This is topic 90 5.0 Stalls? in forum Tech Talk at Northern California Ford Owners .
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Posted by Tony Montana (Member # 8288) on
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My 90 mustang 5.0 with hci 5 speed seems to die after its warmed up when i stop for a while then start the car back up it will just cut off completely and all guages zero out. I can start the car right back up floor it and usually it wont do this again until i get home and need to park. Then when switching from neutral to drive the car will die out again.Im thinking a possible tfi or ground wire problem. Any other ideas? Just some background info cant be maf has done this with two different units, has 24 lb injectors also did it back when i had 19s. Thanks for the info ahead of time.
Posted by Tony Montana (Member # 8288) on
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TTT
Posted by Blind (Member # 3052) on
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a bad tfi wouldn't let you start it back up right away.
what is your timing at, and how much vacuum do you have at idle? Have you checked for vacuum leaks?
Posted by FOXX5.0 (Member # 9094) on
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My car was acting the same It would want to turn off only when it was at normal temp and it won't turn back on and i would have to wait for it to cool down and it would start up no prob it ended up being my distributor
Posted by Tony Montana (Member # 8288) on
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So I scanned the car doing a self test i pulled
34 Egr(EVp) Closed Valve Signal Too High
34Egr (Evp) Closed valve signal low circuit
66 Airflow (MAF/Vaf) Signal Low Circuit Ground
96 Fuel Pump Circuit Open -Battery to Eca
First thing ive down is cleaned out the egr it was full of soot car seems to burn alot clean now i will think of replacing this anyway soon, car is still equipped with all emissions euipment and has a a bbk catted h pipe.
I now notice after some testing this weekend the car sometimes dies after i get on it and dump the clutch in neutral to come to a stop. Im thinking this may be fuel related issue so i am planning on getting a fuel guage to test it next. I will also get out the dmm and test voltage for each component. I do notice that the car will die once i disconnect the air filter or the mass air connector it self.
Posted by Blind (Member # 3052) on
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if it dies while coming to a stop, a lot of times that is just the VSS (speed sensor) on the tranny is unplugged or the wires are messed up. Does your cruise control work?
It has no bearing on the speedometer working as that is mechanical, but the VSS is the sensor that the speedo cable attaches to and it gives the ECU a speed signal to keep the idle bumped while rolling in neutral (clutch in).
Posted by Tony Montana (Member # 8288) on
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Yea ill check that. idle air control also came to my mind so im gona inspect that too. Its just funny cus when it runs i feel nothing holding it back it runs like a beast. i just hate looking like a rookie when my car just dies out and i feel bad when i smoke up the people standing at the corner going sideways just to keep the car on.
Posted by wilber650 (Member # 10360) on
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HAve you looked for vacumm leaks?
Posted by ISLDOUT (Member # 5960) on
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Has this problem been solved? I've got a similar problem that happens every so often.
Posted by Tony Montana (Member # 8288) on
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Still searching for the problem im looking for a vacuum and fuel gauge so i can test for in depth. Also looking for my timing light to adjust that some. Its weird because it happens when getting off the freeway too some times check engine light comes on and car just dies i can pop it back in gear to start it back up after.
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