Currently unavailable.
We don't know when or if this item will be back in stock.
Select delivery location

Actron CP7838 Professional Fuel Pressure Tester

4.5 4.5 out of 5 stars 693 ratings
Currently unavailable.
We don't know when or if this item will be back in stock.
  • This Fuel Pressure Tester is designed for fuel injected systems
  • Measures the available fuel pressure with engine running on or off
  • Features 6-ft hose to aid reaching any test point
  • Handy pouch for storing gauge and adapters and features adaptors to fit most domestic and import applications
  • 2½" gauge with 0-100 psi/0-700 kPa scales for accurate measurements
› See more product details

From the manufacturer

Actron Diagnostic Scan Tools Tool Code Reader Fuel Vacuum Timing Light Automotive
Actron Diagnostic Scan Tools Mechanical Tester Electronic Electrical Fuel Vacuum Timing Light

Actron Diagnostic Tools and Equipment Help You Solve Problems Fast

Scan Tools, Mechanical Testers, Electrical Testers... We have your tools.

Actron's broad range of diagnostic tools and test equipment is designed for ease of use, consistent performance, and superior accuracy. Whether using one of our robustly featured diagnostic scan tools to diagnose a wide variety of engine, transmission, ABS, and airbag issues, or one of our mechanical or electronic testers to verify pressures, temperatures, timing or electrical conductivity, Actron tools deliver the consistent, repeatable results that make modern or vintage vehicle diagnostics simple for both DIYers and professional technicians alike.

  • OBD I & II Diagnostic Scan Tools
  • Battery Load Testers
  • Brake Bleed Kits
  • Fuel Pressure & Vacuum Testers
  • Multimeters & Electrical Testers
  • Non-contact Thermometers
  • Timing Lights
  • Video Inspection Scopes
Actron Diagnostic Scan Tool CP3125-C CP9600 CP9670 CP9660 CP9680 CP 9690 CP9695 OBD II ABS CAN SRS
Actron Digital Multimeters circuit testers logic battery load infrared thermometers timing lights
Actron Mechanical Tester Compression Fuel Pressure Vacuum Brake Bleed Kit Diagnostic

Product Description

This fuel pressure tester diagnoses drivability problems caused by poor fuel pressure. It is designed for fuel injected systems. It features a relief button and 6-ft hose to safely dispose of gasoline without disconnecting the gauge. It also works on the throttle body injection with a threaded connection at fuel filter or throttle body. It is 2½" gauge with 0-100 psi/0-700 kPa scales for accurate measurements. The gauge resolution is not optimal for carburetor applications and it does not include any carburetor adapters. To test fuel pressure on carbureted engines, Actron CP7803 Vacuum and Fuel Pressure Tester Kit can be used.

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.

Feedback

Actron CP7838 Professional Fuel Pressure Tester

Actron CP7838 Professional Fuel Pressure Tester

Found a lower price? Let us know. Although we can't match every price reported, we'll use your feedback to ensure that our prices remain competitive.

Where did you see a lower price?

Fields with an asterisk * are required
/
/
/
/
Please sign in to provide feedback.

Looking for specific info?

Customer reviews

4.5 out of 5 stars
4.5 out of 5
693 global ratings

Customers say

Customers like the quality, value, and adapters of the auto accessory. They mention it's a great tester, it gets the job done, and is well worth the money spent. They appreciate the multiple fittings and the ease of use. However, some customers are mixed on fuel pressure, accuracy, and leakage.

AI-generated from the text of customer reviews

310 customers mention272 positive38 negative

Customers like the quality of the auto accessory. They say it's a great tester, works well, and is well made. Some say it gets the job done and is a useful tool for home mechanics.

"...Thus the entire pack is a great deal and it works amazingly well. I very happy to have added this new tool to my collection...." Read more

"...Trust me spend the extra $20 and buy this one. it has good quaility, it will last and it is a necessity for any do it yourselfer...." Read more

"Used to test fuel pressure on a 2006 f250 6.0 diesel. Worked great but had to buy the adaptor that screwed into the port on the upper fuel filter..." Read more

"I bought this a few months ago and used it only once. Overall, it worked well and seemed to be a decent tool...." Read more

83 customers mention83 positive0 negative

Customers appreciate the value of the auto accessory. They say it's well worth the money spent, a good test setup for the money, and an affordable pressure gauge.

"...It works and is a great value for the price." Read more

"...This is easy to read and has a nice long hose. Nice price as well. My only complaint would be that it does not come in a hard-shell case...." Read more

"...Overall, this is an excellent kit at an excellent price for the home mechanic that only occasionally needs to measure fuel pressure." Read more

"...(I'm guessing here), so no heartburn there, and it *was* a relatively inexpensive tool that gets you up and going right out of the box...." Read more

51 customers mention49 positive2 negative

Customers are satisfied with the adaptor. They mention that it comes with a good variety of adapters and instructions for just about any vehicle out there. Some appreciate the multiple fittings and value of the product.

"...helps with basic trouble shooting of older vehicles and the included adapters are great." Read more

"This is a good guage for the home mechanic. Kit has adapters for just about any vehicle out, you can even splice into a rubber fuel line if the fuel..." Read more

"...I managed to test my fuel pressure and it was nice that it came with extra attachments for other vehicles...." Read more

"...the relief tube will last long, but everything else the kit comes with is very universal and is an essential tool for the average DIY'er...." Read more

39 customers mention36 positive3 negative

Customers find the auto accessory easy to use. They say the instructions are minimal but understandable. They also say it gets the job done with ease, is easy to attach and read, and comes in a nice pouch to put all the fittings in. Customers also say the adapters are useful and versatile. They mention the product is great for quickly determining whether your problem is fuel or ignition.

"...I like these fuel pressure testers, quick and easy to use, especially if you have easy access to your fuel system by way of a Schrader valve up on..." Read more

"...There is a mini-instructions book included, and a storage bag.Fast delivery.Update (2017.02.11): Still working out with no problem...." Read more

"...The gauge is well constructed and easy to use...." Read more

"...Nice pouch for storage too! Has complete instructions, though they're hardly necessary." Read more

30 customers mention24 positive6 negative

Customers like the hose length of the auto accessory. They mention that it has a decent length connection hose and pressure relief hose. The long hose is great for diagosing fuel pressure as you drive, and it's handy.

"...This is easy to read and has a nice long hose. Nice price as well. My only complaint would be that it does not come in a hard-shell case...." Read more

"...I'm glad I did. The gauge is well built and has a decent length connection hose and pressure relief hose, contains several heavy duty brass..." Read more

"...I do like the long hose and the rubber around the gauge. I was able to read the pressure easily inside my vehicle...." Read more

"...Hose is too short for testing WOT. That's a shame because if it was at least 16/20 inches longer it would be perfect...." Read more

41 customers mention28 positive13 negative

Customers have mixed opinions about the fuel pressure of the auto accessory. Some mention that it helped them to check fuel pressure after a fuel pump change, and is a great product. They appreciate the pressure relief feature, and the adapter fittings are nice. Others however, say that it lost pressure and that they cannot check fuel Pressure for a variety of different vehicles.

"...The guage also has a pressure relief button which is nice to have when your done with your testing...." Read more

"...gauge is well built and has a decent length connection hose and pressure relief hose, contains several heavy duty brass adapters, including the..." Read more

"...When the truck would drop below a quarter tank of fuel it would lose pressure." Read more

"Handy automotive diagnostic equipment right here. I like these fuel pressure testers, quick and easy to use, especially if you have easy access to..." Read more

37 customers mention22 positive15 negative

Customers are mixed about the accuracy of the auto accessory. Some mention that it's very accurate, easy to read, and has served them well. However, others say that it gave erratic readings and was giving false readings.

"So far this gauge has served me very well...." Read more

"...So now the gauge is not usable...." Read more

"As far as value it is a good gauge and has a nice long hose...." Read more

"...The loaner leaked no matter what I tried and was giving me false readings. This is easy to read and has a nice long hose. Nice price as well...." Read more

34 customers mention12 positive22 negative

Customers have mixed opinions about the leakage of the auto accessory. Some mention that it's accurate and easy to use with no leaks, while others say that it leaked fuel and the gauge is stuck at 5 psi. The relief valve started leaking, the bleed button leaks fuel when you press it, and the pressure relief switch sometimes leaks gas when depressed to release it.

"...It connected easily to the fuel inlet test port. Some fuel leaked out while installing it, but there were no leaks once the connector was tightened..." Read more

"...I used it to check the fuel pressure of a friend's car yesterday. Zero leaks." Read more

"...Leaked. Put some teflon tape. Second try I was able to diagnose a bad fuel pump...." Read more

"...& hooked the fitting on & the gauge worked as it should but the release valve leaks. Other than that it did what it was suppose to do." Read more

Seems OK, Maybe I Received a Defective Unit?
4 Stars
Seems OK, Maybe I Received a Defective Unit?
I bought this a few months ago and used it only once. Overall, it worked well and seemed to be a decent tool. When I recently took it out to use it a second time, I noticed that the piece in gauge's connector which presses down the valve pin when you attach it to the Schrader valve had fallen out and went missing. So now the gauge is not usable. It could just be that I got a defective unit, so I e-mailed Actron customer support to see if they will replace it under warranty. If I get a positive response from them, I will update this review.Update Dec. 30th, 2016Apparently, Actron is owned by OTC, which is owned by Bosch. I received the following initial response:Loss of components is not covered under any type of warranty. The pieces missing are considered consumable pieces and would need to be replaced on a regular interval to keep the tool working properly and to keep the tool from leaking on the vehicle. Both items( seal and depressor) are available in a kit which includes 5 each of the items. The kit can be purchased as part number 1000-001-5586. The kit can be ordered from our Customer Service by calling 1-800-228-7667.Best regards / Mit freundlichen GrüßenGeraldBosch Automotive Service Solutions LLCACTRON TECHNICAL SUPPORTBosch Automotive Service SolutionsNow I don't know if this is their final answer, as I called the technical support line at 18005336127 #3#3 and someone named Terry answered me from OTC technical support, and said he would check into sending me the replacement parts free of charge. Currently, I'm waiting to hear back from Terry, and then I will update this review again.Update Jan. 4th 2017So I'm updating my review to four stars, since they approved the replacement parts and are shipping them to me free of charge, even though I live outside the United States. I would recommend that if you have a similar warranty related problem, you call them at the number above and not e-mail them.Update Jan. 8th 2017The replacement part arrived, and I've added some pictures of it.
Hide
Thank you for your feedback
Sorry, there was an error
Sorry we couldn't load the review

Top reviews from the United States

Erich V.
5.0 out of 5 stars Great tool to add to my tool collection
Reviewed in the United States on April 11, 2013
Verified Purchase
I have a 1991 Toyota Land Cruiser that I recently inherited from my brother. The first thing I started to do when I got it was to start tuning it up. In the process of performing an overall tune up and inspecting systems that had wear and tear. I needed to restart the engine after having reset the timing while adjusting the valves. In the process I had made a minor oversight in the TDC adjustment. I had set TDC to the exhaust stroke as opposed to the required compression stroke. Consequently I experience a no start situation that sent me on an investigation to rule out 3 key areas that could cause a no start - spark, air, and fuel. Spark is a simple test that you can use a 5 dollar spark test tool or with out it use a simple stunt of turning over the engine and grounding the spark plug to the block to see if there is spark at the plug. After you have observed the spark and shocked yourself you with a major jolt of electricity you can conclude the distributer and the plugs are flowing with current. Next you need to check to make sure that there are no blockages of air coming in through the air box, air cleaner, mass flow sensor and throttle body. Also need to check your vacuum hoses for correct connections, cracks, leaks at connections etc. Now the last part is fuel. Checking fuel will tell me if my fuel pump is working, or if I have a blockage or leak in the system that need to be investigated. Now, you need to check your fuel pressure in the fuel line connecting to the fuel filter leading into the fuel injectors. Farther down stream on the intake manifold you need to check the fuel pressure at the cold start fuel injector. Since my Truck is a Toyota I specifically need the special "M12 X 1.25 Banjo Adapter" provided in the Actron CP7838 Professional Fuel Pressure Tester kit. I used it to pick up the pressure reading at the cold start fuel injector. I could have been easily blocked at that point if it were not for that adapter that many other kits do not provide. You need this adapter to connect to Asian, European and some domestic vehicles equipped with fuel Banjo Bolt Connections. Without this part I could have been running all of the local metro area trying to find one tiny part. The cost in gas and time and frustration to locate that part alone could have easily rivaled the cost of the "Actron CP7838 fuel pressure tester" that I just purchased. The small adapter can be found on the web for around $10 to $12 plus the $5 dollars for shipping and handling. Thus the entire pack is a great deal and it works amazingly well. I very happy to have added this new tool to my collection. It does everything I need it to do for my Land Cruiser. It works and is a great value for the price.
One person found this helpful
Helpful
 Report
illustrious campbell
5.0 out of 5 stars Full review below. Dont wait! Buy this now!! OMG wish i would have bought it sooner!!
Reviewed in the United States on February 16, 2014
Verified Purchase
Thank you God! I have several Cars that need maintenance and that needed to be trouble shot. I like to drag race import cars. I have been having a hell of a time figuring out what was wrong with my race car, my work truck (toyota) and my daily driver. on the these cars i did every thing, Compression test, changed injectors, vacuum test, timing, replace fuel filter, fuel pressure regulator, spark plugs, wires, throttle body, FPR sensor, O2 sensors and the list continues. I just knew that it couldn't be the fuel pump because the fuel pump was less than 2 years old with less than 100 miles and it was Walbro racing pump. Plus I could hear the fuel pump kick on, and i the car/truck would run for a while before it cut off. Well with in 5 minutes of hooking up the Fuel pressure tester i figured out what the problem was! Guess what it was in both my race car and my work truck? yeah the fuel pump! LOL I felt so silly! I had completely rebuilt my race car's engine, transmission, and upgraded damn near every componet on the car, a year and a half project! By the time i figgured out what was wrong over half the race season was over. Plus it helped me to rule out the fuel pump on my daily driver. It turns out my timing belt tensioner failed on my daily driver, that is now fixed also.
This tool has paid for its self 10x over. I use it to help trouble shoot other vehicles. Very Helpful. i also use it to help tune my race car. i leave it hooked up and position the gauge on the windshield so i can see it while i am driving an make adjustments. It is hooked up on my car right now. its great because it has quick disconnect fttings so that i can remove it quickly if necessary.
i shopped around and looked at other brands before i bought this one. there were some out there for less money but their quaility was crap. Trust me spend the extra $20 and buy this one. it has good quaility, it will last and it is a necessity for any do it yourselfer. I hope this helps.
One person found this helpful
Helpful
 Report
Obi Wun Kanobi
5.0 out of 5 stars Worked good
Reviewed in the United States on June 14, 2023
Verified Purchase
Used to test fuel pressure on a 2006 f250 6.0 diesel. Worked great but had to buy the adaptor that screwed into the port on the upper fuel filter housing. This tool did help me find my problem which was the boot on the pick up tube in the fuel tank had broken off. When the truck would drop below a quarter tank of fuel it would lose pressure.
Helpful
 Report

Top reviews from other countries

Darryl B.
5.0 out of 5 stars The hose on the guage as equipped is a good length for viewing from inside the cab.
Reviewed in Canada on January 12, 2020
Verified Purchase
The guage works great and the long hose is convenient for diagnostics.
Report
Jesper Hougaard
3.0 out of 5 stars Missing part
Reviewed in India on July 15, 2020
Verified Purchase
It worked fine for a couple of times until the valve disappeared - now can't attach to Schraeder valve. How to get replacement?
Customer image
Jesper Hougaard
3.0 out of 5 stars Missing part
Reviewed in India on July 15, 2020
It worked fine for a couple of times until the valve disappeared - now can't attach to Schraeder valve. How to get replacement?
Images in this review
Customer image
Customer image
Report
Clayton
5.0 out of 5 stars ... several makes and models of cars and trucks worked perfect
Reviewed in Canada on January 29, 2017
Verified Purchase
used it several times on several makes and models of cars and trucks worked perfect everytime
Report
BRoss
5.0 out of 5 stars Five Stars
Reviewed in Canada on December 8, 2017
Verified Purchase
Better than buying your overpriced part store alterantive
Report
Betty Price
5.0 out of 5 stars Actron ACTCP7838 Professional Fuel Pressure Tester Kit
Reviewed in Canada on May 20, 2013
Verified Purchase
It did everything that I expected and solve my problem in our 2008 truck. This review is getting ridiculous
requiring so many words. This is not a school project.
3 people found this helpful
 Report