V-8 throttle body. stalls at or around 4-600 rpm. I tried pouring gas into the throttle body with no results. It only does this when the engine is warm. I must wait for the engine to cool before it will restart. the fuel pump has not been replaced, the fuel filter has. runs fine at higher rpms and can stay running as long as the foot is on the gas at 1000 rpm or more.
I would replace the idle air control valve, or at least check the connector and wiring very carefully. If you have a scanner, go to live data when the engine is warm to see if you can read what the valve is doing. There is a test procedure at the link below.
Repair Guides Fuel Injected Electronic Engine Controls Idle Air Control...
SOURCE: 1988 nissan pickup engine rotates but does'nt start.
it sounds like the injectors are not opening up man.. replace the injectores and this should fix your problem..good luck keith....
SOURCE: Duramax Shuts off at 1000 rpms
I had the same problem and it ended up being the EGR Valve that was sticking.
SOURCE: 99 silverado 4.3 vortec. engine turns over
put a fuel pressure gauge on it. Check my specs because I am doing this from memory but I think it has to have at least 61 psi and anything below about 55 is not enough. I once put a brand new from the dealer on my bravada. Abter it still did not start I replace the "injector spider" to the tune of 400 buck my cost for the part only to find that the brand new feul pump was not getting enough pressure. Section 4 in a haynes manual at the parts store will give you the minimum fuel pressure.
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