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surging under load...

923 views 0 replies 1 participant last post by  mountainredneck 
#1 ·
89 300e. under heavy load the engine has what feels like a systimatic surging. is it some kind of timing issue? i have cleaned throttle body. i have no known vaccum leaks. it is only noticable under hard acceleration. again, it is rythmic, not random.
 
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