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The Idle Air Control Valve (IAC) is a device that controls the air to fuel ratio in modern fuel systems. A long shaft, called a pintle extends and retracts on a spring within a housing to control the amount of air around the throttle plate. The Electronic Control Module (ECM) controls the pintle and adjusts it as the engine runs. Over time, the Idle Air Control module can collect gunk and get dirty causing the pintle to not extend all the way into the housing. This can cause the engine to run poorly and stall. Cleaning the IAC
Despite what some will tell you, the Idle Air Control can be cleaned in many cases. It will have to be removed from the engine, but standard carburetor cleaner will often clear out the gunk and allow the pintle to slide freely again. Remove the unit, spray the cleaner into the housing and work a rag into the housing to clear out any remaining dirt and debris. Be sure to wear proper protective eye wear. You may need to let the unit soak in carburetor cleaner for a while. it may just be worth pricing it out before cleaning it some iac are very cheap like 20 bucks not sure how much it will run you. may not be your issue but you can at least inspect your iac. also you can pull out your pcv valve and give it a shake if it rattles your good also give it a visual inspection if it doesnt make noise replace it they are also very cheap
that is called engine stalling
all car when the engine stalled, the braking assest (helper) goes
dead. (loss of engine vacuum is cause, and is normal in all stalls)
we had to learn this in driving school in 1960, due to stalls then
are COMMON as nails, but the brakes still work. and ONLY takes more pressure with your foot ,
top cause of all stalls (and in 1960) is not getting a tuneup
ALL cars do this if you IGNORED basic SERVICE.
The ENGINE light came on
that means "get the car serviced," if you have tools it means
to a real shop SCAN it.
way ask blind web bunnies, this, we can diagnose your car,
or force you go get it serviced,
stalls have over 50 causes, a tuneup is top of list since 1884.
That old car in France sill runs and is serviced,proper.
try not to assume things, like pump or anything on car
can not be intermittent, (in fact assume it can and win)
get the car serviced
the operators guide, open it ? see the CHECK engine lamp page
see what it states........bingo
Finding an intermittent problem will be tough for you or a shop if you can't make it happen on demand. You will have to figure out if it is ignition or fuel related. Could be a relay for the ignition or computer, the module for the coil, the coil, or a list of other things. Is the check engine light on when the truck is running ?
Do you have the 4.0 liter inline 6? The CPS (crankshaft position sensor) can cause this kind of behavior. I've been lucky driving 4.0 powered Jeeps since 1989 and not had a CPS go bad but lots of other Jeep owners have. I would check the CPS first but it could be other things. Solving a stalling problem online is difficult.
sounds like either the sock on your fuel pump might be cloged or something more serius your cracnk shaft position sensor is gone. or the map sensor is not sending the right mixure of gas n air
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