p0340

The problem: The engine Idles fine however while under load (accelerating) the check engine light flashes and eventually the engine sputters out as if it were only firing on 2 cylinders and was horribly out of timing. Almost a complete loss of power and usually happens over 55 MPH and above 3000...

2001 Jeep Grand Cheerokee Laredo Codes: P1391, P0300, P0301, P0302, P0303, P0304, P0305, P0340, P0320 Runs rough in idle when in drive or park. Runs ok when driving or neutral. Has shut off once in idle. In idle rpms drop down to 500. I don't know where to start. Have had codes P1391, P0300 and...