car_crazy_dude Posted January 24, 2009 Report Share Posted January 24, 2009 Hey guys, I'm having a weird problem with my 87' corolla and if you could offer some advice that would be great. The corolla runs a 4ac, which due to rough running recently got a carb rebuild. I am now tuning it and the idle was a bit erratic. So I disconnected the EGR system for now and that seems to have fixed the problem. When I went to set the timing the engine revs would jump incredibly when approaching the recommended 5 degrees, even after backing the idle speed, and fast idle speed right off. There is no troubleshooting description of this in the manual and I am quite stumped. :) Quote Link to comment Share on other sites More sharing options...
slapper Posted January 24, 2009 Report Share Posted January 24, 2009 Only thing I can think of is maybe check the cam belt hasn't slipped a notch. cheers, slapper Quote Link to comment Share on other sites More sharing options...
car_crazy_dude Posted January 24, 2009 Author Report Share Posted January 24, 2009 alrighty ill look into it. Thanks. Quote Link to comment Share on other sites More sharing options...
car_crazy_dude Posted January 27, 2009 Author Report Share Posted January 27, 2009 Okay, I had a look and thats no problem. Though I forgot to mention one other symptom - when I try and rev the engine the revs rise and stay at a point. Even if the accelerator is lifted off completely. I'm at the point where I'm thinking of just either letting a mechanic have it, or just buying a newer, better car! Hehe. Your thoughts? Quote Link to comment Share on other sites More sharing options...
slapper Posted January 28, 2009 Report Share Posted January 28, 2009 given the recent "carb-job", I'd be looking for an air leak. That would tally with the distributor twist peaking as well. cheers, Slappe Quote Link to comment Share on other sites More sharing options...
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