Question about Ford F-150

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I have a 1990 ford F150 4X4 5.0 A/T it dies when I put it in Reverse and I have cleaned the intake air control valve and replaced the TPS other words it runs perfect in drive and in park just when I put it in Reverse it dies sometime please help me I don't know what it can be,I have also givin it a full tune up new plugs cap rotor wires fuel filter so I am at the end of my rope and don't know what it is

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Hi! You may start checking on the following:
- Check the automatic transmission fluid level, add some if lacking
- Check the fluid filter if damaged, you will need to replace it
- Check the reverse clutch if its burnt or worn, you will need to replace this or see a nearby mechanic for its gonna be a painful job
Hope this helps and good luck! Have a nice day!

Posted on May 12, 2010

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Posted on Jan 02, 2017

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How to replace a intake plenum gasket


Well basically, you remove the intake plenum and replace the gasket and reinstall the plenum. Here are the steps:

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.
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Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

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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
  1. Disconnect battery ground cable (14301). Refer to Section 14-01 .
  1. Disconnect the engine control sensor wiring (12A581) from the idle air control valve (IAC valve) (9F715) at the idle air control valve electrical connector.
  1. Remove the two idle air control valve retaining bolts.
  1. Remove the idle air control valve and idle air control valve gasket.
Installation
  1. NOTE: If scraping is necessary, be careful not to damage idle air control valve gasket surfaces, or drop material into intake manifold (9424) or throttle body (9E926) (depending upon application).

    Clean idle air control valve gasket mating surfaces.
  1. To install idle air control valve, reverse Removal procedure.
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Those Fords Have Problems With The IAC(Idle Air Control Valve) On Top Of Intake By Throttle Body. It Might Even Be Making Some Weird Noises? If Not Check Timing, And Fuel Preasure.....Check For Vacumme Leaks. Good Luck

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Do this.
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1 Answer

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