Cause of surging idle on 97 ford aerostar?
From experience I'll tell you,,,Take it to the dealer and have it scanned! It can be anything from bad wire connectors or bad wires to one or more sensors out of range. Unless you're rich with a lot of idle time on your hands, get it to a FORD dealer.
Why is my 1995 kia sportage when revved up slow to return to idle Even when i push on the linkage at the intake manifold to slow it down it responds slowly to return to idle?
What would cause my 91 Ford Aerostar to idle fast backfire and run fuel rich exhaust and how do I fix it?
What may cause a 1996 Ford Escort LX to idle rough and that has stalled a few times while reversing?
Any of factors can effect your idle. Things you can have checked or check yourself, if you feel brave enough are: vacuum leaks, fuel system, egr, pcv, air filter, could be your fuel is not putting out sufficient fuel, head gasket (to my experience, usually not the cause if car properly maintained). Usually this is caused by the fuel system not operating properly.
first you will need to determine if it is surging due to a fuel issue or governor issue. to do this hold the throttle linkage at the carb from moving. slightly higher than at idle. if it stops surging then it is the governor that needs to be reset. if it continues to surge then you have a fuel issue
Most comon cause is a vacuum leak but an idle surge could be caused by a number of issues. Check your tps and map sensors. Check for leaks around the throttle body. An easy but not always accurate way to check for leaks is to spray throttle body cleaner in short bursts on the area of a suspected leak. Any changes in idle should indicate a vacuum leak.
My Haynes repair manual shows : It senses throttle movement and position , then transmits a voltage signal to the PCM . This signal enables the PCM to determine when the throttle is closed , in a cruise position , or wide open . A defective TPS can cause surging , stalling , rough idle and other driveability problems because the PCM thinks the throttle is moving when it is not .
Will coolant temp sensor cause a 1990 Chevrolet Caprice 5.0 to have an erratic idle or to not idle altogether?
No. I would say the surging idle, or not wanting to idle at all would be your tps(throttle position sensor). In some cases you can take them off an clean them an get lucky. other cases there pop rivited in, so by then you mite just as well buy a new one, for there not very expencive. But it has nothing to do with your temp sensor. Best of luck, and hope my information was…
What would cause a 1996 Plymouth Neon 2.0 to keep shutting off while you come to a stop the idle is surging also?
From the sounds of it, the AIC Valve (Air Idle Control Valve) is on the outs!!! Surging is usually the giveaway of this .... stalling is the other. Now .... with that said, there are other reasons for this as well. There could be water in the fuel or you may have a vacuum leak or a few other problems. I would have to suspect the AIC Valve is the culprit though as it's a…