Hi I have priviouse posts of this subject , this engine serge's only when warm or I think when thermostat opens , and only above 2000rpm port side injector cuts out but Not long enough to log a code on ECM , ok I've put new manifold risers , new low and high pressure fuel pumps , clean fuel and lines , new ECM new oil senders , water senders , new dicey cap , plugs leads , rotor in distributor , 2 new water pumps , cleaned grounds, new alternator , batteries , rebuilt tbi unit , good compression,new oil and fuel filters , new map sencor ,new throttle position sencer , new air sencer , would a leaking riser gasget couse serging deose anyone know ?and it's still doing it any help please ????????
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