1997 k2500 Suburban 5.7L - I have to press fuel pedal to floor before it will start.

Asked by kfreeman39 Feb 06, 2018 at 07:18 PM about the 1997 Chevrolet Suburban K2500 4WD

Question type: General

1997 k2500 Suburban 5.7L - I have to press fuel pedal to floor before it will
start. After it starts - idles and runs great. It will start without pressing pedal to
floor, on cold start up. Reading a lot about people suggesting regulator, but was
fixed by replacing temp senor? Any advice would be great!!

8 Answers

225,385

You should start by checking fuel pressure. Fuel pressure should be 56 to 63 lbs with just the key turned to on. Let it sit once fuel pressure builds up to see if it bleeds down. If it bleeds down then there is a problem in the fuel delivery system.

1 people found this helpful.
40,375

I remember hearing putting the pedal to the floor kills any fuel signal in the event of flooding , maybe from you rowe ?

Fuel pressure holding at 58/59 psi. Issue still- Cold = starts right up. After warm = Engine just cranks until I press pedal to floor, then starts and runs fine with the smell of a gas.

225,385

So fuel pressure is not the problem. Vacuum leak? Check for vacuum leaks along the intake and plenum while the engine is running.

2 people found this helpful.

All vacuum lines are good and check plenum - No issues. Update - I have replaced plenum,spider injection,fuel pump and send unit, new fuel filter, regulator, plugs, distributor, wires and reprogrammed ECM

225,385

Have you checked for any codes? Also another place to look is at the wiring harness that runs to the throttle positioning sensor. Wires like to break up by the TPS. This would not be a visual check as a wire will break inside the insulation.

Yes I hooked up my scan tool-No codes. If there's miscommunication to TPS, that would throw a code?

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