Fuel Pressure Testing
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Member
Joined: Apr 2003
Posts: 135
Likes: 2
From: Midland, Texas
Car: 92 Camaro RS
Engine: 305
Transmission: 700R4
Fuel Pressure Testing
I am going to be testing the pressure on a 1992 305 engine with TBI. If it is out of spec (to high or low) how do I know if I have a bad regulator or pump problem. I don't want to replace the wrong item.
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Joined: Jan 2007
Posts: 1,873
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From: OC CA
Car: 75 Beast
Engine: 383 +EBL Flash
Transmission: 700R4
Axle/Gears: 4.11 with 33"
Re: Fuel Pressure Testing
Kaupca
You can perform a 'deadhead' test on FP by pinching off return line. If the fuel pump is healthy observed fuel pressure will zoom past 13 PSI to about 20+ for a stock pump. If you do not see fuel pressure jump then it is Fuel pump time - the least favorite job of my. If you're getting very low fuel pressure otherwise and deadhead test shows healthy pressure jump than get the FPR spring and diaphragm replaced.
//RF
You can perform a 'deadhead' test on FP by pinching off return line. If the fuel pump is healthy observed fuel pressure will zoom past 13 PSI to about 20+ for a stock pump. If you do not see fuel pressure jump then it is Fuel pump time - the least favorite job of my. If you're getting very low fuel pressure otherwise and deadhead test shows healthy pressure jump than get the FPR spring and diaphragm replaced.
//RF
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