replaced ETM with a BBA remain one, replaced all coil packs, spark plugs, accelerator pedal and MAF, all gen parts used and new.
Symptoms are:
erratic idle 500-1200rpm, stuttering on pick up, previously boosted to 9psi without boost cut now will only boost to 4psi and get boost cut, very loud dump of the boost when it cuts and finally intermittent misfire. Only code stored is still P0121.
All vac pipes replaced and all boost pipes checked and seem to be ok
Anyone got any ideas?
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