Guest 88gl Posted July 19, 2002 Share Posted July 19, 2002 Whenever I extend the throttle past a certain point, my vent controls switch to Max A/C. I know that the vent control system is run off of the vacuum system - what's going on?? It may be coincidence, but going past the same throttle position seems to produce a hesitation when the engine is cold also.....?????? Any help would be great. Thanks!! Quote Link to comment Share on other sites More sharing options...
Guest Skip Posted July 19, 2002 Share Posted July 19, 2002 would help to know what engine we are asking about. But my quess is the white vacuum canister on the shelf behind the pass side sturt tower has a bad check valve. EZ test Quote Link to comment Share on other sites More sharing options...
Guest 88gl Posted July 22, 2002 Share Posted July 22, 2002 It's an 88 GL Wagon - 1.8 SPFI Quote Link to comment Share on other sites More sharing options...
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