Q: 1992 Plymouth Grand Caravan 3.3 V-6 Heavy off idle miss. Smooths out at higher rpm.
Engine starts OK. Idles for a minute or so until stalls. Noted heavy modulation of IAC to maintain idle. As throttle is opened off of idle, heavy stumble /heavy missing occurs. Intake popping indicative of lean out condition. Engine struggles to gain any RPM just above idle. IF the engine RPM does manage to get above about 2000 RPM then engine misfire instantly and completely disappears. Above aprox 2000 RPM, Engine readily revs up and responds normally to throttle opening. 2 junk yard MAP sensors swapped in -No change, 2 junk yard ECMs swapped in -No change. NEW TPS swapped in -No Change. NO EGR provision on this particular engine, as from factory.
My car has 240000 miles.
My car has an automatic transmission.
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