Question about 1988 Chevrolet S-10

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88 s-10 PU 2.5 TBI hard to start after sitting overnight. Misses, bucks and kicks like a mule till it finally starts. Runs good after warmup but I also get no heat. Replaced heater core, thermostat, radiator. No leaks,not blowing out steam from tailpipe so head gasket cant be bad. Replaced it anyway 3 months ago. 2 problems need 2 solutions. I suspect maybe EGR valve is not working properly on hard start issue, but the heat issue has me stumped. Any suggestions? Limited cash, so I cant spend too much. Single Dad with too many bills.

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As far as the poor running and hard starting, yes, it could be egr or valves or timing or almost anything. Your heat problem : I suspect the heater core may be air locked. With the engine running, loosen one heater hose with the heat control on hot, and see if you can get any air out of it.
Also, check your water pump. Squeeze your rad hose as tight as you can for a bit. When you release it, you should feel a surge of coolant go through it.
Check your heat control valve to see that it's working.

Posted on Nov 15, 2009


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