I have a 1994 Intrepid that stalls out after about an hour of driving. If I let it cool off for about a half hour I can drive it for another hour before it stalls again. It only stalls when I am slowing or have come to a complete stop. Sometimes it does drive for a little more than an hour but then if I happen to park and shut of the car somewhere it won't start until I let it cool down. The engine does turn over but won't actually start.

I took it to a mechanic who hooked it up to his diagnostic machine and told me no error codes came up and he couldn't find any issue with it. (useful!!)

I had a friend who is fairly car handy take a look at it and he said that my alternator puts out 12 volts when it should be 13-14 but he said it doesn't make sense that the car would only stall when it heats up, other than that he couldn't find anything.

I am wondering if anyone else has had this issue or can help me troubleshoot through this. I'll be happy to answer any questions you may have.

EDIT: I should mention that my fluid levels are okay.

 

I should add that today I checked to see if I could get an error code on the dash and today I got 11-12-55.

 

12- Problem with stand-by memory circuit. Direct battery input to controller disconnected within the last 50 ignition key-ons.
13- Indicates a problem with the MAP sensor pneumatic system.
14- MAP sensor voltage too low or too high.
15- A problem with the vehicle speed sensor signal. No speed sensor signal detected during driving conditions.
16- Loss of battery voltage
17- Engine coolant temperature indicating engine temperature cold too long.
21- Oxygen sensor voltage not fluctuating.
22- Coolant sensor voltage too high or too low.
23- Throttle body temp sensor below acceptable parameters.
24- Throttle position sensor voltage too high or too low.
25- Automatic Idle Speed motor detects a shorted condition in one or more circuits
26- Peak Injector current has not been reached.
27- One of the injector control circuit output drivers does not respond properly to the control signal.
31- Problem with the canister purge solenoid circuit
32- An open or shorted condition detected in the EGR transducer circuit.
33- Air conditioning clutch relay circuit open or shorted.
34- Open or shorted condition found in the speed control vacuum or vent solenoid circuit.
35- Radiator fan relay circuit open or shorted.
36- Problem with the air switching solenoid circuit.
37- Open or shorted condition detected in the torque converter unlock solenoid circuit.
41- Problem with charging system. Voltage below 11.75.
42- ASD (Automatic ShutDown) relay control open or shorted.
43- Engine misfire in one or more cylinders.
44- Ambient/Battery Temperature too high or too low.
45- Transmission temp sensor not indicating warm condition.
46- Charging system voltage too high.
47- Charging system voltage too low.
51- Oxygen sensor signal indicates a lean condition.
52- Oxygen sensor signal indicates a rich condition.
53- Internal PCM failure.
54- No cam signal to PCM.
55- End of code message.
62- Unsuccessful attempt to update EMR mileage in the controller EEPROM.
63- PCM failure. EEPROM write denied.

 

Could be overheating also check and might replace air idle control sensor and throtle position sensor.

 

11 is a bad crank sensor...your problem. 12 standard fault ( I always see it. %% just lets you know end of test. Sorry, I've been away