Odd Idle
06-04-2003, 08:16 AM
#15
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Join Date: Jan 2003
Location: London, Ontario
Posts: 2,871
Revs up and down like you are blipping the throttle?
If so, I would say a vacuum leak or your idle screw is not closed enough. 1.2 K idle is too high. Mine would do the 1 -1.5K bounce then settle around 1.2K after adjusting the idle screw as far as it would go to compensate for a very rich idle (too much fuel pressure from manual FPR). It would also bounce like that if the PCV hose blew off under boost.
If so, I would say a vacuum leak or your idle screw is not closed enough. 1.2 K idle is too high. Mine would do the 1 -1.5K bounce then settle around 1.2K after adjusting the idle screw as far as it would go to compensate for a very rich idle (too much fuel pressure from manual FPR). It would also bounce like that if the PCV hose blew off under boost.
06-04-2003, 08:20 AM
#17
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Join Date: Nov 2002
Location: Orlando
Posts: 517
Originally Posted by TYSON' date='Jun 4 2003, 05:16 AM
Revs up and down like you are blipping the throttle?
If so, I would say a vacuum leak or your idle screw is not closed enough. 1.2 K idle is too high. Mine would do the 1 -1.5K bounce then settle around 1.2K after adjusting the idle screw as far as it would go to compensate for a very rich idle (too much fuel pressure from manual FPR). It would also bounce like that if the PCV hose blew off under boost.
If so, I would say a vacuum leak or your idle screw is not closed enough. 1.2 K idle is too high. Mine would do the 1 -1.5K bounce then settle around 1.2K after adjusting the idle screw as far as it would go to compensate for a very rich idle (too much fuel pressure from manual FPR). It would also bounce like that if the PCV hose blew off under boost.
06-04-2003, 08:08 PM
#18
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Thread Starter
Join Date: Dec 2002
Location: Mystic, CT
Posts: 126
Originally Posted by TYSON' date='Jun 4 2003, 05:16 AM
Revs up and down like you are blipping the throttle?
If so, I would say a vacuum leak or your idle screw is not closed enough. 1.2 K idle is too high. Mine would do the 1 -1.5K bounce then settle around 1.2K after adjusting the idle screw as far as it would go to compensate for a very rich idle (too much fuel pressure from manual FPR). It would also bounce like that if the PCV hose blew off under boost.
If so, I would say a vacuum leak or your idle screw is not closed enough. 1.2 K idle is too high. Mine would do the 1 -1.5K bounce then settle around 1.2K after adjusting the idle screw as far as it would go to compensate for a very rich idle (too much fuel pressure from manual FPR). It would also bounce like that if the PCV hose blew off under boost.
06-04-2003, 10:07 PM
#19
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Join Date: Jan 2003
Location: London, Ontario
Posts: 2,871
Originally Posted by rbrtech' date='Jun 4 2003, 09:20 AM
[quote name='TYSON' date='Jun 4 2003, 05:16 AM'] Revs up and down like you are blipping the throttle?
If so, I would say a vacuum leak or your idle screw is not closed enough. 1.2 K idle is too high. Mine would do the 1 -1.5K bounce then settle around 1.2K after adjusting the idle screw as far as it would go to compensate for a very rich idle (too much fuel pressure from manual FPR). It would also bounce like that if the PCV hose blew off under boost.
If so, I would say a vacuum leak or your idle screw is not closed enough. 1.2 K idle is too high. Mine would do the 1 -1.5K bounce then settle around 1.2K after adjusting the idle screw as far as it would go to compensate for a very rich idle (too much fuel pressure from manual FPR). It would also bounce like that if the PCV hose blew off under boost.
It would take a massive vacuum leak to bleed off that much pressure. You may need to do the whole vacuum hose job. Your problem may be a combination of vacuum leak and solenoid trouble?
06-04-2003, 10:16 PM
#20
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Join Date: Jan 2003
Location: London, Ontario
Posts: 2,871
Originally Posted by 94boosted' date='Jun 4 2003, 09:08 PM
[quote name='TYSON' date='Jun 4 2003, 05:16 AM'] Revs up and down like you are blipping the throttle?
If so, I would say a vacuum leak or your idle screw is not closed enough. 1.2 K idle is too high. Mine would do the 1 -1.5K bounce then settle around 1.2K after adjusting the idle screw as far as it would go to compensate for a very rich idle (too much fuel pressure from manual FPR). It would also bounce like that if the PCV hose blew off under boost.
If so, I would say a vacuum leak or your idle screw is not closed enough. 1.2 K idle is too high. Mine would do the 1 -1.5K bounce then settle around 1.2K after adjusting the idle screw as far as it would go to compensate for a very rich idle (too much fuel pressure from manual FPR). It would also bounce like that if the PCV hose blew off under boost.
Well, as long as you are ABSOLUTELY sure you have no vacuum leaks, you can adjust the idle screw. Check for leaks first. You can hear if the PCV valve blew off 6 feet away!
The idle screw is on the underside of the throttle body. You can adjust your idle from 1.2K down to 800. CHECK FOR LEAKS FIRST!!