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Re: BOOST PROBLEMS
Posted by Craig [Email] (more from Craig) on Sat, 23 Mar 2002 22:23:59
In Reply to: BOOST PROBLEMS, 9000 t driver, Sat, 23 Mar 2002 22:05:47
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I assume it's just surging, not completely cutting off and then going again. If the latter you are probably hitting the fuel pump cut off (which is pretty dramatic.) If the former then, yes, you probably are getting some knock. Are you running premium fuel? It sounds like you are also still using the stock FPR (fuel pressure regulator.) You can't get very far into the red with the stock 2.5bar fpr before running lean and likely getting some detonation. There are several ways to diagnose this (from hooking up a multimeter or air/fuel gauge to the O2 sensor to hooking an LED to the APC box) but I'd just go ahead and get a cheap used 3.0bar FPR and give it a shot.
Craig
posted by 152.16.2...
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