89 spider hot start issue, fixed!
My 89, very reliable for the last 5 years has developed a serious hot start issue.
It started a few months ago when it woudl take 10" of cranking to start when hot. Then it woudl fire and run fine with a slight fuel smell initially , whcih would clear right away
It got worst. Now after a run (20' or more) it will not restart unless it has cooled for 45 minutes. It cranks fine, tries to fire up and missfire badly as if running on two cyl. Needs a lot of throttle to keep running. After about 30' of sitting hood open it will run a little better, like on 3 cyl, but still undrivable.... another 15/20' and it will start and run fine. Plenty of power, runs great
So far, I have thrown the following parts of the problem.
Coil, crank position sensor, external fuel pump, fuel filter. No luck
What could it be? The Heat part of the issue makes me believe it's something in the engine compartment and not the in tank fuel pump. What could be affected by hear? Air flow sensor?
I don't see vapor lock as the problem as after some rough running it seems like fresh fuel woudl be forced thru and the problem woudl clear up
Thanks for any leads
My 89, very reliable for the last 5 years has developed a serious hot start issue.
It started a few months ago when it woudl take 10" of cranking to start when hot. Then it woudl fire and run fine with a slight fuel smell initially , whcih would clear right away
It got worst. Now after a run (20' or more) it will not restart unless it has cooled for 45 minutes. It cranks fine, tries to fire up and missfire badly as if running on two cyl. Needs a lot of throttle to keep running. After about 30' of sitting hood open it will run a little better, like on 3 cyl, but still undrivable.... another 15/20' and it will start and run fine. Plenty of power, runs great
So far, I have thrown the following parts of the problem.
Coil, crank position sensor, external fuel pump, fuel filter. No luck
What could it be? The Heat part of the issue makes me believe it's something in the engine compartment and not the in tank fuel pump. What could be affected by hear? Air flow sensor?
I don't see vapor lock as the problem as after some rough running it seems like fresh fuel woudl be forced thru and the problem woudl clear up
Thanks for any leads