1988stangGT5.0

I am reposting because I have learned some more since my last post and I did not want any confusion.

Hard Start/No Start after the car is hot (warmed up - hard start like dead battery)

New Battery/Alternator tests fine/Starter Tests Fine/ICM tested fine when hot

I was thinking a heat soaked starter - but after warming to running temp, she wants to stall at stop signs (rpms waiver between600 and back up to around 1100) nothing to do with a starter right?

Any other thoughts out there? Can a relay cause a hard start at all after running the car?

HELP

Dan

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nitrous_bob

thats a tuf fissue, good tuners sometimes grind a pin to eliminate that.

because they cannot cure it any other ways.

call alternative auto in clinton twp mi and ask them for advice.

just google them you'll get a number

mjr46

sounds like you have two seperate issues for the stalling?? check for vaccum leaks, run a koer test, and check Iac motor and or clean it and TB.....for starter issue..you may have a bad cell in the battery..if it's not a maintenence free battery, check each individual cell with a hydrometer = 1265 for each cell and if you have headers wrapping around the starter then heat soak may be an issue or just plain bad contacts in the starter

uedlose

check to see if you are getting a voltage drop on your cables Pos and Neg. most people will over look this and start throwing parts at it. put a test light on one end of the cable that you are testing then put the other end on the same cable you are testing and have some one crank the car if the test light lights you need cablescheap easy and beats throwing parts atit if it is whats wrong with it. Learned that one from a Electrical Engineer.

FoxGT

Next time it's hot try using a pretty thick wire to jump between the two large terminals on the starter solenoid. Make sure the car is out of gear & key is in the on position. It may or may not cause the car to start. Basically what we're wanting to see here is if the problem is with the contacts of the solenoid. Do this when the car is warm & see if it starts any easier.

3 things come to my mind for what's wrong.

1. The starter is going bad. I know you said you had it checked, but it can check out good & still be going bad. My starter on my '89 did the same thing, didn't want to start after the car was warm, but the starter tested as good.

2. Bad starter ground. This you can check by running a wire from either of the starter bolts to the - side of the battery.

3. Bad connection with the starter power wire. Could be the wire itself & the heat is making it harder to get power to the starter. This one's the least likely, but a possibility. I'd check it last.

I'm leaning more toward #1 if bypassing the solenoid doesn't work. The other two have a slim chance of that being the problem, but they can be checked before spending money to replace the starter.