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Discussion Starter · #1 ·
Hello, Well I am just wondering what fuel pressure testers are used on our 7.3's. The reason I ask is because I bought a actron model cp7838. It says never us on a diesel. Now I understand that I will not be connecting to a actual fuel rail like on my 302, but the gauge I have is up to 100 psi and our fuel systems stock should be around 50-55 psi. I guess I am missing something here. Any thoughts. Jeremy
 

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It will work but you need to flush it on a gas engine or the diesel will eat it up. You can take the hose off it to utilize the end and then attach it to a longer hose that will reach up to the driver's window so you can test it going down the road. Attach other end to a hydraulic pressure gauge like ones used on spraying equipment.
 

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Diesel is essentially a thin oil. I think most of us use oil pressure gauges to test fuel pressure on these trucks. You can get an oil pressure gauge for less than half what that Actron setup cost.
 

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I think the one he is talking about is in the $20s but has that end that goes into the Schrader valve and can be used on a gasser. RT. Is correct oil pressure gauges can be had cheap. I use one for spray equipment, is glycerine filled and was less than $20. I got it a Napa and believe it's a SprayPro
 

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Discussion Starter · #5 ·
Fuel pressure tester

Thank you, Maryland dieselnick and RT for the info. I will look into getting the oi pressure gauge set up. I guess I should have asked about this before I spent 47 dollars on the actron gauge though.
 
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