Question about 1985 Ford F150
Truck had been sitting for a year or so
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Posted on Jan 02, 2017
Check to see if there is any vacuum hoses off at the black intake tube, or at the vacuum tee on the left rear of the upper intake manifold. The vacuum
hose(s) on the tee were a common problem, and would come off, creating a lean condition and set the check engine light on.
Posted on Oct 07, 2009
I found this on two 1999 F150 trucks with 5.4L. One was mine. There is a vacuum hose on the back passenger side of the engine that is about the size and length of your thumb. With age, this hose will collapse and then develop a vacuum leak. It can be pretty load if leaking.
Posted on Jun 22, 2010
SOURCE: Ford E-350 2001 V-10 gas.
Check your fuel vapor recovery system, your van has unusual set up, and the effect is RAW fuel gets purged, rather than vapor.
The dead giveaway test is does the issue happen on light acceleration? Does it stop if you let off the throttle? Can you accelerate harder and "get past" the issue?
Posted on Dec 12, 2010
Tips for a great answer:
Jun 20, 2017 | 1998 Buick Skylark
Feb 12, 2011 | 1988 Mitsubishi Galant
Dec 12, 2010 | 2002 Ford E350
Buy a can of throttle valve cleaner (it is made by CRC) from the local auto parts store, spray it into the air intake through the throttle body of the engine until you have used about half the can, you will need to hold the idle up while you do this, it will try to stall, after this shut the engine down and disconnect the Negative (-) battery cable for 5 minutes. The intake is now clean, if you continue to have the idle speed control problems you may need to seek the help of a professional.
Feb 08, 2009 | 1996 Mitsubishi Eclipse
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