Z3 99 2.8 Idle / Power Issues
Back looking for help with this persistant problem...
Rough idle at cold start...spitter / sputter & no throttle response. Restart car a few times and issue clears up. Once on the road, throttle response is poor with much hesitation on the top end (drop a gear and the car will take off as it should) and, after cruising along at highway speed, all power is lost & no throttle response (car will not stall out) period. Pull over, turn off car and restart immeditely, everything returns to normal and the process begins again.
Codes are indictating misfires & O2 sensors.
I have replaced / performed the following...
Precat O2 sensors...fuel injectors...intake manifold rubbers...crankcase vent valve and hoses...fuel filter...rebuilt the dual vanos...cleaned the throttle body...cleaned the MAF x 2...new plugs.
Costs are climbing without any changes...greatly appreciate any assistance offered.
Last edited by PEIZ3; 08-25-2011 at 10:22 AM.