Question about 2002 Dodge Caravan
I have a 2002 Dodge caravan 2.4 L 41te. Van was idling fine, then when stopped at light would hesitate on take off. Then started running rough all the time. Put vacuum gauge on EGR valve would bleed down, replaced it seemed to help a little bit, but still hesitated on take off. Put scanner on it showed no faults, got aggravated unplugged ISC to make it throw a fault, it did'nt. But of all things engine ran smoother and when I put it in gear would not hesitate one bit. With ISC plugged in engine rpm was 850-956 unplugged, it was roughly 950 1050 rpm. TPS was 16.8 closed 76.8 wide open. Why does'nt it throw a fault with ISC unplugged, and why is it running better with Isc unplugged. This is rather confusing to me.
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Posted on Jan 02, 2017
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Sep 03, 2013 | 2004 Dodge Neon
Here are the most common causes of idle surge, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue 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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