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I have a 1990 cutlass supreme. It runs good while da motor is cool but when it gets hot the engine cuts off and will not crank back up until the motor cools off. And then it will start back up.

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  • Cars & Trucks Master
  • 3,519 Answers

Hi Putt:
Bogdan definitely has it covered. I'll try to suggest some trouble shooting to maybe help figure out what the problem is.
Firt off, WORK SAFE! Engine coolant is HOT and we don't want anything cooked as in body parts............
- So, start by making sure that the engine is COLD.
- Put a cloth over the radiator cap and SLOWLY remove it.
- Check the fluid level. If it's visible it should be OK. If you can't see any we need to know how much is gone, and where it went. That should help tell what the problem is.
- Check the oil. If it seems overfull and creamy or has water globs, we're probably dealing with a blown head gasket or intake manifold gasket. If the level is ok, we carry on.
- Check the spark plugs. Keep them organized by cylinder, and look at the sparking pointy ends that thread into the engine. They will "talk" to you and tell you what is going on inside the combustion chamber. In particular, one dirty, wet, fouled looking plug may be an indication of a blown head gasked between the water jacket and a cylinder.
- Check the compression. Low on one or 2 cylinders leads us back to the headgasket theory. High leads us to the manifold gasket (if watery oil) otherwise, we're getting to wondering about the thermostat.
- One of the first considerations if the coolant level was low would have been to look for any obvious coolant leaks around the water pump, radiator, and hoses, and also to check for lots of white steam coming from the exhaust.. If the water pump is leaking, it needs to be replaced. Lots of white water vapour in the exhaust tells you a head gasket is broken.
Now is the time to sift through all of this information, find what is relevant, and see what you can figure out.
I like to think of it as using the symptoms to try to find the problem.
Stay cool, and enjoy.

Posted on Apr 20, 2015

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  • Cars & Trucks Master
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It is overheating ,thermostat,radiator,water pump,coolant sensor,coolant level,temperature sensor?

Posted on Apr 20, 2015

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wyatt1582
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SOURCE: truck cuts off while driving down the road.

Replace the TFI module. Ford back in 1986 thur 1993 had problems like the one you wrote about. TFI module gets hot and shuts car or truck off then when it cools sometmies starts and sometimes not.

Posted on Jun 15, 2009

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SOURCE: truck after engine gets hot starts sputtering

You're getting a condition known as "vapor lock" or hydrostatic lock. This happens when you run your fule lines too close to a heat source (exhaust, engine, etc). You can solve it by re-routing it away from those heat sopurces...this should help.

Posted on Aug 07, 2009

  • 1 Answer

SOURCE: 1990 Olds cutlass supreme 6cyl 3.1 engine; motor starter works ok

1990 OLDSMOBILE 3.1 6 CYLINDER ENGINE I WOULD LIKE TO KNOW LOCATION ON ENGINE WHARE CRANKSHAFT POSITION SENSOR IS LOCATED

Posted on Nov 06, 2009

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SOURCE: 1999 chevy malibu, stalls, no restart after

I had the same problem-my check engine kept coming up with crank sensor(replaced several times- the car would run for 2 days then stall again)finally checked and replaced the wiring harness and the car ran great for awhile. Now I have a whole new problem(abs lights started coming on and the gauges all died while driving at which point the car just stopped and woulkd not restart)thinking alternator(the battery works great in another car)

Posted on Mar 16, 2010

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SOURCE: 1987 Ford F150 with 302 and dual tanks. Engine cutting out problem

My wife's when hers did this, I tried changing mant things, I finally after playing name that part, I found it was the TFI, replaced it and I no longer had the issue. It was the same way in description. She has not had the problem since.

Posted on Jan 02, 2012

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