Tbi 5.7 wont start

Asked by Mar 14, 2016 at 11:02 PM about the 1989 Chevrolet Suburban V20 4WD

Question type: Maintenance & Repair

I have a 1989 suburban v2500 with a 5.7 tbi. It ran
good when I bought it and I drove it everywhere for
about 6 months the only issue with it is that if I
drove it for a long time and would stop shut it off
and get to restart it it would take a long time to get
it going and would have to feather the gas to keep
it running them when I wks start driving it again to
would be fine. Now I parked it in front of my house
3 days ago and it will not start. I sprayed starter
fluid and it would go and I wks floor it and it had a
really low idle for a few seconds and would die.
The injectors look like they are spraying fine
I switched The t ps and ingition module. Any
advice would help.

7 Answers


Low fuel pressure,sounds like fuel filter is clogged or the fuel pump is bad.

Could my fuel pressure regulator in the tbi cause this symptom too?




You can check the fuel pressure with a guage to confirm.


The fuel pressure should be 9 to 13 lbs.

Ok I'll see if I can rent a pressure set from autozone should I test it beings the fuel filter?


Make sure an have a new fuel filter installed first for best results. The fuel pressure gauge will hook up by the TBI. Make sure and find the set-up to be able to check fuel pressure for a TBI, there are different configurations of fittings for what you are checking, say like on a Vortec, it has a Schrader valve to hook on to, Yours does not.

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