Question about Ford F-150

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1990 Ford F150 5.0 it dies when in reverse and I cleaned the intake air control valve abd have installed a new TPS but it only dies sometimes not all the time just when I put it right into reverse someties if I let it just run for alittle while sometimes it won't dies but sometimes it does can you please help me

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  • davepart3100 May 12, 2010

    ok so that is two that say the same thing so tomorrow I will change the filter

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First thing off if it only dies in reverse then you have a trani problem, not an engine problem...
so I would start with the cheapest solution, the home made trani flush...
Drop the trani pan and filter and replace the filter. then take the trani cooler line loose at teh cooler ( the one that flows out of the trani ) and put it into a large bucket. put 8 qt of trani fluid in the trani and start the engine you should have trani fluid flowing into your bucket at this point pour another 6 qt of fluid into the trani while its running. once you get all the fluid into the trani shut the engine down. reconnect the line and top off your trani fluid. this might free up your the check ball and should make it run better in rev.

Posted on May 12, 2010

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I have 1990 ford f150 5.8 liter it idles high when in park and idles about 1200 rpm when in gear and sometimes surges up and down. i have clean the idle control and check showing 12.5 ohms still won&#


One common problem is a vac leak or a sticking throttle plate.
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How to replace a intake plenum gasket


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1. Disconnect the negative battery cable from the remote jumper terminal located at the right strut tower.
2. Remove the air inlet resonator and tube.
3. Remove the throttle actuator cables from the throttle arm and bracket.
4. Disconnect Secondary Runner Valve (SRV), Manifold Tuning Valve (MTV), Throttle Position Sensor (TPS), Idle Air Control (IAC) motor electrical connectors.
5. Remove the electrical connector and the Intake Air Temperature/Manifold Absolute Pressure (TMAP) sensor.
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I have a 1990 olds 88 royale 3.8 Just replaced the fuel pump, and both fuel filter. A week later coming to a stop the car dies. It's seems every time I approach a stop and get under 25 mph it dies....


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may just need cleaning with carb cleaner.

here is 1996, oldest I have:

Section 03-14: Engine Controls, Electronic 1996 Taurus, Sable Workshop Manual
REMOVAL AND INSTALLATION Idle Air Control (IAC) Valve Removal
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Installation
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    Clean idle air control valve gasket mating surfaces.
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1991 ford probe


duck tape on the air intake. I just fixed mine. There is a crack on the intake that lets too much air in when you put it in drive that makes the car stall. Try it it works.

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