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Re: 1994 ford e-150 idles too high. smells like gas too....
First thing i would do is clean out the throttle body a lot of time carbon build up can cause the linkage to stick causing a high idle any carb cleaner works fine good luck
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White smoke is water vapor and in this cold climate it is normal. Strong gas smell is not normal although you may smell some while engine is warming up. Bad cat converter can produce smells, but usually more like rotten eggs. If engine is running rough and seems rich, check coolant temp sensor. Bad converter can cause stalling too. Otherwise, idle speed is controlled by idle air contol motor which can get dirty and stick. Any codes set?
Is the Exhaust Converter from 1994 & broken inside, rattles when you tap on it,& blocking the exhaust Replace it !! Gas filter not more than 5 years old & fuel pressure correct on a gauge read at the motor
i have a 1994 gmc jimmy 4.3l cpi. i could not pass the emission test.hard to start, spuddered, and smell of gas was strong. long story short, i replaced my spider injectors, good to go. $278 brand new from auto zone.
Check fuel pressure regulator by removing the vacuum hose. If idle does not change or fuel comes out of regulator replace it. Otherwise check your injectors one at a time while car is running. If idle does not change replace it.
I would check sparkplugs, plug wires, vacuum hoses to map sensor, check to see if exhaust is strong out pipe, may be a catalytic convertor stopped up , bad O2 sensor will cause starting and idling problems.
Here is the most common cause of surges and stalls and low idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
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