Question about 1990 Ford F250

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Ford bronco 1988 .351 4x4 c6 trans

Engine starts and runs smooth but as soon as it reaches operating temp the engine starts running like its starving for fuel...kicking bucking the transmission downshifts and upshifts over and over again...when the engine compartment is opened a it smells like really rich running engine...so rich in fact it almost makes ur eyes water. If u dont keep the gas pedal just about floored then the engin will die but as soon as it cools again it will start up fine...it also ran perfectly in below freezing weather and never had a problem...whats the deal...i am stumped and so are my friends any help would be greatly appreciated

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My 83 bronco used to do that too and all it need is the choke adjusted for warmer weather

Posted on Jan 09, 2009

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Posted on Jan 02, 2017

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I have an 91 bronco with an automatic transmission that wont shift on its own. It will shift fine if you run it through the gears automatically,but doesn't shift when its in drive.


91-bronco-automatic-transmission-wont-h3u3bvaxgt5rbqkhjnnyjnme-5-0.jpg
this is the modulator this one is pre-adjusted for A4ld
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this is the other one that is adjustable for the c-6 trans
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E40D trans they are all different and maybe you'll find it now there is 4.9 motor 5.0 5.8 and all can come with A4ld /E40D / or C6 transmission look for broken or disconnected vacuum lines or if the engine is running rough you must correct the running condition because you are loosing vacuum inches and the trans needs vacuum at a certain level to shift if the engine stutters your loosing the vacuum and it will never shift that's what this sounds like to me or that modulator needs adjustment or to be replaced later man! it's party time!

Mar 20, 2015 | 1991 Ford Bronco

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Probably a loose or missing vacuum hose. Check the vacuum diagram under the hood and look for loose or cracked hoses.

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1985 Ford Bronco 2 choke plate not closing


The choke butterfly (choke plate as you call it) can only be partially closed when the engine is cold. It is used to create a low pressure under in the throat of the carby which causes excess fuel into the engine when cranking and early running to help warm up and to prevent the carby icing up. After a few minutes the butterfly will be fully open and remain that way while the engine is at operating temp. As to the engine stopping down the road look for another fault -- Like incorrect fuel cap on tank , blocked fuel filter, dirty air filter If the engine starts easily and runs I doubt that the fault will be in the carby.

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I have 88 fullsize bronco with 351w and c6 trans, when i start it runs fine till i put it into gear it stalls and won't start till it sits for a while, before this happened my engine temp gauge was jumping...


Check all your grounds. Behind the right cylinder head, on right lower front of block and engine to frame. Also check fuse links at starter solenoid.

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Engine stalls oh warm days


change the electronic ignition module.try this as well.go to an electronics parts place and get a can of cold spray.mg chemicals or equivalent. \spray the module the -60 temp will take the heat out and if it runs,that is the problem. the heatsink compound on the back of the module dries out and it overheats.heat sink compound MUST be used when it is replaced .it is a special high heat di electric silicone based compound...

Jun 13, 2009 | 1989 Ford Bronco

1 Answer

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Check the EGR valve, make sure it is working properly

Apr 14, 2009 | 1992 Ford Bronco

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2000 chevy blazer starting issues


swng,
1) Is the service engine soon light ever on when engine is running?
2) Per your description I would look at the ECT sending unit. It sends coolant temperature information the the Engine Control Module for proper fuel delivery for cold engine start. It may have lost its calibration.
Let me know.
Regards,

Feb 24, 2009 | 2001 Chevrolet Blazer

1 Answer

Will a ford c6 tranny bolt on to a 1995 ford 5.0l or 5.8l motor?


From 1990-1996 The C6 was replaced by the E4OD which was modified to include a fourth forward speed and electronic shift controls, replacing the hydraulic control mechanism of the C6.

The C6 works fine in your bronco.. Your friend will need a different transfer case!. i dont have the manual but this is my best guess. FOrd likes to make cars that have interchangeable parts. Like a 1999focus can interchange with 2007. as long as the liter and engine size are the same. In some cases. you will have to use different transfercase.

So you might be better off with a c6 transfer case or c4 for your friend.

Hope this helps

Feb 16, 2009 | 1995 Ford Bronco

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