Runs rough after sitting in hot weather
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Join Date: Feb 2009
Location: Meridian, MS
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Car: 1992 RS 25th anniv convertible
Engine: 5.0 TBI
Transmission: Auto
Runs rough after sitting in hot weather
OK, maybe someone can help. I have a '92 RS 305 TBI that runs really well most of the time. The problem arises when I crank it up at the end of the work day - only in really hot weather. If the car has been sitting in 90+ degree MS heat all day while I am working, it misses, stumbles on acceleration and generally runs like crap all the way home. After shutdown it will resume normal smoothness after it has been cooling in the garage for 20-30 mins. This situation never happens in winter, fall or spring, only in the hot deep south summer. Unfortunate because the car is a convertible and I need it to run nice in hot weather. Does anyone know what sensor or (?) may be causing this?
#3
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Join Date: Feb 2009
Location: Meridian, MS
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Car: 1992 RS 25th anniv convertible
Engine: 5.0 TBI
Transmission: Auto
Re: Runs rough after sitting in hot weather
It is absolutely 100% stock, very well taken care of, low mileage, I am the second owner. I replaced the fuel pump 2 years ago and the alternator/belt last year; everything else is original. It has been doing this for about a year but remember, only when it gets really hot. I sort of forget the issue during the other parts of the year. Nowadays, when I crank it after sitting in the sun all day, it immediately runs up to 1500+ rpm, stays there and runs rough all the way home. 15 minutes after shutting it down in the garage I can crank it and it runs just fine. Any suggestions would be greatly appreciated...
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