1995 Chevy Suburban fuel pressure danger

SEADIVER

MEMBER
1995 CHEVROLET SUBURBAN

Engine Performance problem
1995 Chevy Suburban V8 Four Wheel Drive Automatic

Re trying to change my fuel filter: My book warns of high pressure if I have the MFI fuel injection, and that it is very high even with the engine off (it gives the technical procedure for relieving the pressure if you do). But how can I figure out if I have that system? Is it enough just to take off the gas cap and have a rag around the fittings?
Thanks for any advice.

3 Replies

JDL

MECHANIC
16,098 POSTS

Usually if the vehicle sits overnight without being cranked or started, the fuel system shouldn't have much pressure on it. But, you do need to be careful. My info shows you have TBI, not much pressure. Use a rag over the connection and break it loose slowly. You could kill the fuel pump, then start the vehicle, let it run till it dies.

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Sunday, March 8th, 2009 AT 12:09 PM

SEADIVER

MEMBER
2 POSTS

JDL, thanks for your reply. After loosening the fittings I lost about 1/4 cup of fuel, but my towel absorbed it and I got the new one in, so all is well. Still don't know how to find out what kind of fuel system I have. I'll take your word for it that its TBI but how did you know?

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Tuesday, March 10th, 2009 AT 6:34 PM

JDL

MECHANIC
16,098 POSTS

https://www.2carpros.com/articles/mitchell1eautorepair-car-repair-manuals

You can look it up in a database. Autozone has a lot of vehicle information, wiring diagrams, in their vehicle repair guides. Large libraries usually carry automotive databases.

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Wednesday, March 11th, 2009 AT 8:11 AM