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
The engine and automatic transmission in this vehicles drive train are fully electronically controlled by a computer called the PCM and TCM (Power Train Control Module, Transmission Control Module). When a problem like this or other drive-ability related problems occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM
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