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I have a 1986 ranger2.9 runs good until it gets hot then shuts off

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This problem is one i dealt with a long time. It is caused by the idle air bypass valve located on the passenger side of the intake manifold. They run about 30 to 60 dollars but trust me i wish i would have replaced it before all the rest of the stuff i tried. I have the 2.9 ltr also bronco ii. If you want to test this before buying a new one you can take the one off and clean it out good with carb cleaner but be aware there is a gasket you will need to either cut out a new one or something to seal it back up. Anyways after doing this drive it and see if it stalls. If not spend the money to get a new one or this will continue to happen when it gets dirty again and much more often than if u get new one

Posted on Apr 11, 2015

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Check fuel @ the rail when it cuts-off if there check for spark,if the spark isn't there U might need to get a new ignition control module that cld fail @ high temperature.If fuel isn't there u might need to check the fuel pump or relay....if al the above is ok then further diagnostics must be done

Posted on Apr 11, 2015

  • Naiton Apr 11, 2015


    check fuel @ the rail when it cuts-off if there check for spark,if the spark isn't there U might need to get a new ignition control module that cld fail @ high temperature.If fuel isn't there u might need to check the fuel pump or relay....if al the above is ok then further diagnostics must be done

  • Naiton Apr 11, 2015


    check fuel @ the rail when it cuts-off if there check for spark,if the spark isn't there U might need to get a new ignition control module that cld fail @ high temperature.If fuel isn't there u might need to check the fuel pump or relay....if al the above is ok then further diagnostics must be done

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Check the preheated air intake, it may be stuck open to hot air. it's the tube that is between the intake pre filtered and exhaust manifold. there is a valve that switches between hot and fresh air.

Posted on Apr 11, 2015

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Posted on Jan 02, 2017

honeymokey
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SOURCE: buick-lesabre 1986 dies on a hot day

Try a crank sensor. Next time it stops pour or spray water on it and see if it will start. If it does you will know what you need.

Posted on Jul 08, 2009

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SOURCE: 2000 silvarado 5.3 vortech runs good for awhile

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

Posted on Oct 07, 2009

teds_repairs
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SOURCE: my daughter has a 94 mustang it runs good until it gets hot then it shuts off if you wait about 15 min.it will crank back up and runs until it gets hot again any ideas?

check the coolant temp sensor . it is telling the computer it is too hot

Posted on Dec 10, 2012

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Runs fine until it gets warm or hot then cuts off then cools and will recrank


Does it crank over when the engine is hot. If it does sounds like your maybe loosing fuel if so check fuel pressure if t is good check for spark could be a bad crank sensor or bad distributor.

Jan 19, 2013 | 1994 GMC Jimmy

1 Answer

1986 Subaru GL 4 Door Sedan problem: Shuts down after fifteen minutes of driving. Let sit for 1hr restarts normal for another 15 min.Temp. Normal gas meter always at more thn half Opinions heard Fuel...


Fuel pump heats up and malfunctions??? HaHa that's a good one. Tell the dope that told you that, I said the fuel pump is only going to get as hot as the fuel it is sitting in....or at least, lets hope so, unless you like to see bombs go off!

The best advice I can give you is this:
1. Check to see if there are any fault codes in your computer. (On an '86 Subaru, the computer might not be very smart, but check it anyway.)

2. If there are no codes, run the engine untill it stalls, then pull one of the spark plugs and see if there is any spark when you try to start it.

3. If it has spark, then you should check to see if it is getting fuel.

You have to find out which system is failing (Spark or Fuel) before you can even guess what is causing the problem.

Feb 05, 2011 | 1986 Subaru Gl 2 Door

1 Answer

Runs great untill it get hot then i sounds like it is running out of gas and will not start until it cools off


I would check the pick up coil and/or the ignition control module on the distributor.

Oct 18, 2010 | 1986 Ford Bronco II

1 Answer

My 1986 Ford F-150 5.0 EFI runs good, but when I start it it revs to 1700 rpm untill I give it a little gas then it drops to normal rpm. How do I stop it from the high revs when started?


Does it rev high when started cold or hot? If it does it either hot or cold, check the throttle position sensor on throttle body. If that is not bad, then check the automatic choke sensor.

Jul 03, 2010 | 1986 Ford F150 SuperCab

1 Answer

Is there a thermostat shut off switch . car runs


The amount that it gets hot is a clue but theres no shut off switch. It's possible that the car is over heating and the temp gauge does'nt have enought water over it to report the problem. once the cooling system is cleared as it's full circulating and the fan will come on when it's hot ( disconnect the temp. switch on the therostate cover on the top of the transmission, ( the stat is in the lower hose ) with it disconnected and the key on the fan should be on and connected f till it's real hot. The crank senser or distrubutor module can can too hot and shut down too

May 13, 2010 | 1997 Toyota Corolla

1 Answer

1986 ford econoline ignition failure


It could be your catalytic converter which is clogged, when the car is cold.. you are getting enough exhaust escaping allowing the car to run, but it will be very restrictive, once this is hot is so restricted that it will not allow the car to restart.
This can be a serious condition and if parked over dry grass or trash could actually start a fire. Take you vehicle to a respectable exhaust specialist.

Mar 25, 2010 | 1986 Ford Econoline

1 Answer

Buick-lesabre 1986 dies on a hot day


Try a crank sensor. Next time it stops pour or spray water on it and see if it will start. If it does you will know what you need.

Jul 07, 2009 | 1986 Buick LeSabre

1 Answer

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.

Jun 14, 2009 | 1993 Ford F150 SuperCab

1 Answer

Intermitant temperature


Check to make sure your thermostat works right by monitoring the warming up of your engine. With a completely cold engine, start and run the engine for a few minutes, then put your hand on the top radiator hose to monitor if and when it gets warm as the thermostat opens more and more and note the gauge reading( if it works) the top radiator hose should be unbearably hot within 5-8 minutes. If the therm. opens right it should close right aswell, staying open a little while eventhough the radiator may have cooled may be what you are experiencing causing the rapid cooling and is nothing to worry about. The Hose should not get warm very soon after starting the engine. Regarding you gauge, lets take one step at a time, verify proper op. or the therm.

Jan 20, 2009 | 1986 Toyota 4Runner

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