when my1993 s-10 warms up and i cut it off it will not start back..for some reason the fuel is not pumping when it is warm...it will not cut off riding down the road..only when trying to restart when warm do i have a problem......i have replaced the fuel pump, the complete throttle body, mapp sensor, pick-up coil, ignition coil, all fuel filters temperature sensor and various others...any ideas would be greatly appreciated..ps...i was going to change oth the ecm or ecu next...could this be the problem
2007-02-28 13:19:42 · 5 answers · asked by bryan m 1 in Cars & Transportation ➔ Maintenance & Repairs
You didn't say what engine and fuel system you have. It would also help to know what you mean by the fuel not pumping. Have you checked the fuel pressure with a guage while cranking especially when it will not start. I think you need to start over in your diagnosis. Get the truck in the no start condition and find out what you have and do not have.
You need fuel at the correct pressure, spark at the proper time and strong enough, and compression. For instance: if you have a 4.3 Liter engine with CFI injection you will need at least 55 psi fuel pressure durng cranking or you will not start. If yours is TBI injected you must achieve 13 psi or you will have start problems.
2007-02-28 14:07:12 · answer #1 · answered by Anonymous · 0⤊ 0⤋
The ECU/ECM could be the problem, but i doubt it, I am not real knowledgable with the GMs. But I think there is a sensor with engine temp linked to the throttle body. It sounds like your problem is there. Check it out. Also you could try replacing the throttle position sensor.
Best of Luck!
2007-02-28 13:24:47 · answer #2 · answered by Tweendasheetz 3 · 0⤊ 0⤋
i own a shop,and the only time i ever seen one do this was when the coil would get hot on it and after it cooled off it would start back,on one other occasion i did see a fuel pump relay going bad and it would do this because of the heat around it,other than that i don't know what else to tell you to try,good luck,i hope this help,s.
2007-02-28 13:25:26 · answer #3 · answered by dodge man 7 · 0⤊ 0⤋
it could be that the starter is getting too hot,especially the solenoid.i dont know if they sell them anymore,but at 1 time,you could get a heat shield that goes on the solenoid,to keep the heat away from it.
2007-02-28 14:47:11 · answer #4 · answered by Anonymous · 0⤊ 0⤋
there is a circuit that inject,s fuel on start up........other than your cold start circuit........the problem could be in the wiring or the ecm..........have this checked out.
2007-02-28 13:59:08 · answer #5 · answered by slipstream 7 · 0⤊ 0⤋