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Re: bucking and whining (long)
Posted by JohnK (more from JohnK) on Tue, 13 Mar 2001 10:26:55
In Reply to: bucking and whining (long), Josh, Mon, 12 Mar 2001 10:22:37
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The first problem could be anumber of things as Keith describes. Your description makes me think that you might be hitting the knock sensor under full boost conditions. Are you running 93 octane fuel? Try a bottle of 104 octane boost and see if it goes away. Low quality gas will do it. But if you always run premium anyway, then you need to track down the knock cause. Could be that your base timing is off. You might also have a cracked vacuum hose leading to your distributor that is not bad enough to screw up regular driving, but is enough to weaken the boost timing retard function. if the hesitation is not full turbo boost related, then your air mass meter might be starting to go,and the best way to check this is to pop in a known good one.
Re the heating control problem, in addition to Keith's ideas, you might have a hose off the control switch. You can pull the radio and the DIN sleeve that it sits in, and take a look at the back of the air distribution control switch. It's best to pull the dash panel to sort out the vacuum hoses if you see one that is broken or loose. A snap for the technician to check out.
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