im having some trouble starting my car. 88 iroc 305 tpi auto. it doesnt start by just turning the key. i have to let it crank for 5-10 seconds while giving it a quick 1/4 pedal tap. after that you can smell the gas in the exhaust so i know its starting rich. when its cold out the car will start like it should as soon as the key is turned no cranking.

ideas of what to check?

 

coolent temp sensor

 

cool thats what i was leaning towards. ummm where is it located on the motor?

 

Depends which motor you have. On the tbi's they are right in the middle of the intake towards the front.

One side note. Theres only one recognized tps signal during startup and thats wot. With the pedal floored the ecm will change the af ratio to about 20:1. Otherwise youll get normal fuel enrichment on startup.

 

i found where it was. replaced the coolant sensor. figured it was $6 so what can i lose. didnt help. any other ideas.

 

Try flooring it while your starting it. If it starts right up you probably have a leaky injector.

 

Sounds like leaky injectors. Get a fuel pressure gage and monitor your fuel pressure after turning the motor off.