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Six cyl high idle. already replaced tps

High idle on 1996 ford f150 six cyl. already replaced tps

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  • apeacock5 Apr 15, 2009

    no. was looking for any possible sensor probs 1st. all else says possible intake leak also

  • apeacock5 Apr 15, 2009

    i will check for a leak in the manifold . if that doesnt work, i will check maf sensor

  • apeacock5 Apr 15, 2009

    what do i check manifold leak with & how?

  • apeacock5 Apr 15, 2009

    will check tomorrow with spray. Thanx for the help.

  • yadayada
    yadayada May 11, 2010

    use carburetor spray cleaner, if you spray a leak the engine idle will change allot, spray where the manifold bolts to the head..

  • yadayada
    yadayada May 11, 2010

    I am a Ford factory trained tech, check what I said.

  • yadayada
    yadayada May 11, 2010

    The only real cause of high idle on these engines is a vacuum leak at the intake manifold, have u tested the intake for leaks?

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The problem could also be caused by a bad mass airflow sensor. you may be able to get one cheap at a junk yard.

Posted on Apr 15, 2009

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I have a 2004 Jeep grand cherokee straight six. I replaced the TPS sensor & IAC sensor. recently experienced high idle while in park, lack of power, and engine light came on with a code of P0121? ...
Depending on the system, P0121 is Throttle/pedal position sensor/switch A circuit range/ performance problem.

Did the TPS have slotted mounting holes? If so it may need to be adjusted.

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Considering the regulator has no effect on starting lets save that for later. You are surely getting too much fuel. Try unplugging the TPS (hot, cold, and startup). The computer will substitute a default value and you will notice a difference if it's as bad as you say.

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I have a revving sound on the engine when I shift gears. The rpms are not high so I am baffled. This is a ford f-150 6 cylinder 4.2l , man trans. It idles normal
Sounds like you may need to replace the TPS (throttle position sensor), that will cause the idle not to fall in between shifts.

Mar 10, 2011 | 2000 Ford F150 Flareside SuperCab

1 Answer

I have a1990 f150 4.9 cyl. my truck turn on but, the idleing is high for a few seconds then it low and turns off
change your tps sensor this is call a throttle positioning sensor. this controls your throttle idle and increases and decreases your revs as you need them good luck.

Aug 31, 2010 | 1990 Ford F150

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I have a 2000 ford f150 4.2 six and the overdrive transmission wants to downshift when coasting or gas is depressed at 55 and 60 mile per hour. works good all other times. the down shift is in and out many...
Start with checking the TPS, A bad TPS will cause this type of problem. Make sure that the wire harness is good and if it is, then good chance that the TPS will need to be replaced.

Feb 22, 2010 | 2000 Ford F150 Flareside SuperCab

1 Answer

P0102 code on 1996 f-150 302 replaced MAF will not run shuts down if you put in drive and try to excelerate, cold will start obtains high idle, put in gear shut off, will sometimes start if accelerator...
maf senser a tps senser are linked ,by they both sense the load on the engine ,one does it throttle opening and the other by air density u may check the tps and also for excessive air leaks around induction system

Jan 31, 2010 | 1996 Ford F150 Regular Cab

1 Answer

Idles bad
Sounds like you may have an upper intake manifold leak. Typically the gasket between the Plenum and the lower intake dries up and gets sucked into the intake a little causing a leak and a high idle issue. The repair requires the removal of the plenum and replacement of the gasket. NOTE: there is a torx bolt hidden between the center plenum runners and can only be seen by looking straight down at the top of the plenum and it may be covered in dirt. If you have to use a bar to pry off the plenum you probably have missed a bolt. Typically it is the one noted above. Best of luck.

Mar 22, 2009 | 1991 Ford F150

1 Answer

4.9 liter will idle but wont accelerate have to start with ether
yes checked fuel pressure and replaced the fuel filter, checked the mapp sensor,tested throttle position sensor, has strong spark, 50psi fuel pressure, fresh tune up, runs real rich and rough idle but wont rev up like fuel injectors arent speeding up, also checked exhaust. thanks julius

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1992 ford f150
Possiable IAC valve sticking or faulty TPS.

Jul 04, 2008 | 1992 Ford F150 SuperCab

1 Answer

Missfiring ford
maybe you replaced them wrong

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