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I have a 1988 ford 150 truck. it is idling too fast when driving,i have to brake to get it to slow down,it will slow down only when braking

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When you are not driveing and you press the gas pedal do the idles return to normal or not?

Posted on Jul 26, 2008


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1 Answer

1988 ford f-150, 5.0 eng. truck is idling way too fast after it's warmed up. Why???

check emissions controls for leaks.. may have a vacuum leak in the hoses somewhere.

Feb 10, 2013 | 1988 Ford F 150

1 Answer

2000 mercury villager, runs a fast idle. whether cold or warm the idle remains at a high idle speed, it even pulls with the brake applied.

Could be a vac leak, or a dirty throttle body, or a faulty idle air control valve. The computer controls idle speed by regulating the amount of air into the intake. Could also be something pulling on the throttle cable such as the cruise control.

Sep 28, 2012 | 2000 Mercury Villager

2 Answers

I have 1999Chevy suburban with 6.5 turbo diesel idles up and down and when driving the gas pedal is real touchy Wat is the problem and were do i locate the problem

Check the help links related to this problem.Click the link below to go through its troubleshooting procedure :-----Idles rough and quits when gas pedal is pressed less?
Car won't start without hitting the gas pedal?
-------Complete loss of brake pedal then all gets normal?
------Car dies when gas pedal is pressed?
--------Pushing on the gas pedal, but the car slows down? Gas pedal to the floor and the car slows down?


After replacing brake rotors and pads, brake pedal remains on floor?


accelerator pedal sensor?


For rough idle issues and problem troubleshooting,go through the help links provided below :----- van idles rough?

will not idle when cold?

runs lean and idles rough?

Engine stumbles coming off idle when warm?

Erratic idle on car?

Low idle when cold out side?

Idle Air Control (IAC) Valve Replacing?

Engine quits at idle?

Car overheats and Air blows hot at idle?

While stop engine idles like cylinder missing?


This will help.


Mar 01, 2012 | 1999 GMC Suburban

1 Answer

1985 fordf-150 inline6 idles down,shuts off when i hit the breaks

your brake booster is loosing vaccum! [damaged diaghram or the hose or valve to the booster]
Cheers Rob

Sep 14, 2009 | 1985 Ford F150

1 Answer

I have a 1988 f150. I have had to several shops

sounds like you need to adjust your rear brake drums

Jul 12, 2009 | 1988 Ford F 150

1 Answer

Will not drop down from fast idle when first started

It sounds like an automatic choke system. Let it warm up for 5 minutes and then give it gas up to 2000rpm and release.

Nov 19, 2008 | 2007 Ford E-150 XLT Wagon

2 Answers

Too fast idle

what can be happening and is a common issue is that the pedal return spring on the throttle body (linkage) gets weak over the years it happened to mine 2 months ago so u just want to make it tighter by winding it around one more time and lubricate the whole linkage

Jul 25, 2008 | 1988 Ford F 150

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