The ol stang runs good when it's cold .
when it's hot she has problems , after driving it till hot if I shut her down for a minuite and start it up again it turns over slow but still starts fairly easy in addition to this my rpm's are slightly lower and when accellerating it gives sort of a stumble or a miss and a very noticable but un steady knock coming from what sounds like the rear of the car.
after a couple of minuites it quits missing but has the knock after the initial load while accellerating seems to lose 15-20 hp from it's colder running state. car is all stock with new exhst front to back, battery, alt, fule filter,and I run premium gas.
check engine light is on with codes 32 and 82 extracted passed e-test.
any info would be a big help,I'm a chevy guy trying to have faith in an old ford. hope it don't see the boneyard any time soon.
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Re: fixer uper 89 lx 5.0 trouble when hot
That could be coming from a couple of places. first thing I would do if it is an automatic tranny, replace the tranny filter and flush the fluid. If that is not it, check the intake/exhaust manifold gaskets. One of these could have rotten out from old age. Finally, if once the engine heats up, if the oil pressure drops dramatically once the engine is warmed up, rod bearings and main bearings have gone out on it.
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How do you know it gets hot? Are you going by the temperature gauge on the dash? Or have you checked under the hood and found out the engine really is running hot? ...Reason I ask is, something just doesn't sound right in your description. After just 5 minutes from starting and driving away, the engine would not yet be at normal operating temperature. That would explain the heater not yet warm. But the temp. gauge says hot? If so, I would replace the temperature sending unit on the engine. the one for the dash gauge, and see if that was the problem-not reading the temp. accurately. Couple of other things: Are you sure you got all the air out of the coolant system? Start the car with the radiator cap off and let it run until the engine is warmed up fully, then shut it off and install the cap. Does your reservoir tank stay about half full where it should be, between the full-hot and full-cold marks? If your problem persists. I would have the coolant system pressure tested, and see if you could get a true temperature reading of the coolant when it seems to be running hot. Good luck.
do you mean wont crank over and start till it cools off? if thats the case it sounds like you got a bad crankshaft position sensor,,thge sensor is fine when its cold and warm but when it gets hot it goes open and the cars computer cant see the rpm and shuts the engine off,and then when it cools off the sensor works again and the car starts and is ok till it gets hot again,if thats the case thats what it is,,,hope this helps,,,about $100 for the part