1990 Audi Quattro

Engine Performance problem
1990 Audi Quattro V8 All Wheel Drive Automatic 160000 miles

upon hard acceleration engine seem to momentarily stall then resume acceleration. Once car is warm transmission sometimes goes into limp mode upon deceleration. Witch can be remedied by shifting to neutral turning ignition off momentarily immediately restarting and returning to drive. Changed fuel filter. Made no difference. Ecu has been swapped with known good ecu. Made no difference.
January 18, 2009.

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