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I have a 1989 firebird formula 350 tunned port injected it has a high 6 ignition when it is cold it starts fine when i hits operating temp and i shut the car off and i restart it it just cranks with no start but if i spray starting fluid in it it starts but it has a miss in it
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Does this happen when the engine is at operating temp or cold. If its at operating temp then check the coolant sensor that sends it's signal to the computer. In 88 engines were known to use two sensors, one for the gauge and one for the computer. If its when engine is cold the check the pressure from the fuel pump. Make sure it is pumping at spec.
I'm assuming the engine cranks with the starter but does not start and run.
check the operation of the cold start injector. This is a separate fuel injector that injects fuel into the intake manifold to help richen up the mixture for cold starts. It operates on a timer that is linked to a sensor that measures engine coolant temperature. Once warm or the timer runs out, the cold start injector is turned off. Other things to check:
Fuel pressure too high (floods engine through cold start injector), engine coolant temp sensor or intake air temp sensor is stuck at full hot (doesn't allow enough fuel for cold starts), fuel injectors are leaking (floods engine with fuel).
i have an 89 formula firebird replaced fuel pump this morning and pump only is getting 6 volts instead of twelve. can't hear pump either..what do i do next
Starter Have a friend turn the key to the start position while you tap the starter with a hammer. If the starter is going bad but has not completely failed most of the time it will start when you tap on it.
Ignition switch If the key turnes easily and lights, radio, etc. come on when it is in the on position I don't think it is the switch. Plus if the starter has never been replaced I'd say the chance that is the problem is very high.
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