Actron CP7838 Professional Fuel Pressure Tester

by Actron

Product Features

• 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
• Features adaptors to fit most domestic and import applications

Product Details

• Product Dimensions: 12.5 x 8.5 x 2.8 inches ; 2.2 pounds
• Shipping Weight: 2.4 pounds (View shipping rates and policies)
• Shipping: This item is also available for shipping to select countries outside the U.S.
• ASIN: B0009XQUKC
• Item model number: CP7838
• Average Customer Review: 4.5 out of 5 stars  See all reviews (40 customer reviews)
• Amazon Best Sellers Rank: #303 in Automotive (See Top 100 in Automotive)
  • #1 in Automotive > Tools & Equipment > Diagnostic & Test Tools > Fuel Pressure Testers

Product Description

This fuel pressure tester diagnoses drivability problems caused by poor fuel pressure. 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.

Customer Reviews

Most Helpful Customer Reviews

20 of 21 people found the following review helpful:

5.0 out of 5 stars Great Moneysaver, January 18, 2007

By 

Peter Hofker (B-town, IN USA) - See all my reviews
(REAL NAME)   

This review is from: Actron CP7838 Professional Fuel Pressure Tester (Misc.)

The modern fuel injection systems are great! Untill something goes wrong. Then you find out that the problem can be caused by any of the many parts involved. In my case, bad start caused by: clogged or leaking injectors, faulty pressure regulator, clogged fuel line and/or filter, fuelpump pressure and more.
I will not write down my experiences with the local stealership, suffice to say that if they touch a vehicle I own ever again I will call de cops!
After eliminating electronic causes I replaced the fuelfilter (cheap, easy and about time anyway). When that didn't do the trick I checked out the carforums online for my model/year and found a host of possible causes for the problem. I also found that the single one thing needed for a proper diagnose of the fuel system was a fuel pressure tester.
Found this one at a price below that of any of the fuel system parts.
It absolutely worked for me. I was able to pinpoint the problem within minutes and after replacing the fuelpump I could see exactly what effect my repair had!
It has saved me a lot of money, time and aggravation!
The tester is certainly worth 5 stars. It does what it is supposed to, is solid enough to last a lifetime and very affordable.
The only negative I can think of is the manual, which gives very limited instructions.
Get a good manual for your model/year vehicle or go online and find what you need to know (or, preferably, do both). Read up!
Remember, you will be working on your cars FUEL system. You need to know what you are doing!!! Knowhow and common sense are absolute musts!!!
So are the proper tools. This is one of them. Be Safe!

15 of 15 people found the following review helpful:

5.0 out of 5 stars Good Guage, September 1, 2010

By 

J. Hey (Mishawaka,IN) - See all my reviews
(REAL NAME)   

Amazon Verified Purchase

This review is from: Actron CP7838 Professional Fuel Pressure Tester (Misc.)

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 rail adapter you need isn't in the kit. My particular vehicle is a Lexus RX300 which is basically a V6 toyota with Lexus decals, this kit came with the proper banjo bolt adapter and sealing washers for me to do the pressure test. The guage is encased in rubber so you can lay it face down on the windshield and check the pressures from inside the vehicle without it sliding down the windshield. The guage also has a pressure relief button which is nice to have when your done with your testing. Two things I would want you to do before using the guage for the first time. 1 remove the black test line atached to the guage and wrap the threads in teflon tape. It's worth 25 seconds of your time to prevent a leak. 2 At the other end of the same black line is a brass fitting, look inside it and you will see a rubber o-ring give it a shot of WD-40. It's worth another 5 seconds of your time. The extra 30 seconds of prep Gave me a leak free test first use. Happy testing.

22 of 24 people found the following review helpful:

4.0 out of 5 stars not bad but be careful, August 20, 2007

By 

P. McDonnell (Fair Oaks, CA USA) - See all my reviews
(REAL NAME)   

This review is from: Actron CP7838 Professional Fuel Pressure Tester (Misc.)

The first one I bought started leaking raw gasoline from the gauge while I was testing the pressure on a running car! Very scary. My son was just coming out into the garage and I yelled to get back in the house while I ran to turn off the engine. Luckily, nothing happened but it could have been a disaster. It may have been a rare manufacturing defect but who knows how good the quality on these things really is? I ended up getting a replacement for free and that one has been just fine. No problems. However, the first experience still haunts me. So when you first use one of these things, have someone in the car ready to kill the engine and keep a very close eye on the tester for at elast the first 10 mins of use.