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My 95 chevy blazer 4.3 2wd wont start unless i spray starting fluid into the throttle body then it stays running and drives good...when shutting the blazer off and restarting it it only spins over and not fire
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Maybe a problem in the fuel pump circuit. Check fuel pressure with engine off, and key turned to on, not start. If no pressure, diagnose the pump circuit at the fuel pump relay. One terminal for the relay would be the power feed for the pump. The engine computer signals the relay on for 2 seconds with key on to prime the system, also signals during engine cranking.
I'm following another issue like this on a 1996 Jimmy. This engine requires 60psi or more fuel pressure to run. You need to have someone check the fuel pressure at the rail- throttle body with a gauge.
It drops when it is turned off through the return the pump might be getting weak If you keep using the starting fluid you will blow the intake off of it or it will get hooked on it and won't start without it.
What about the fuel filter????? Have you changed it out??? If you can spary something like a started fluid, that means it is a fuel problem. My last check, it has to be above 50-psi on the fuel pressure to make it run right. I had 35psi, but whould not get over 30mph or down hill maybe 45mph. Check both filter & pressure, but check pressure with a New fule filter!!!!
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