l98 idle surging
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Joined: Jan 2008
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From: Salt Lake City UT
l98 idle surging
i have developed a new problem with my car. my engine begins to surge after it becomes warm. also if i have the car in drive and am at a stop with the brake on dose not surge as bad if at all. from what i have found on the search there many different things to look for. i have checked TPS - good, i did not find any obvious vacuum leaks or borken tubes. i have replaced MAP and o2 previously. last year did complete tune, plugs, wires, rotor, cap, fuel filter. i have pulled IAC, was really nasty, im thinking i should pull it again and clean it, bu not sure that is the problem, how can i test the IAC for function? thanks for any help.
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Joined: Jul 2011
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i have developed a new problem with my car. my engine begins to surge after it becomes warm. also if i have the car in drive and am at a stop with the brake on dose not surge as bad if at all. from what i have found on the search there many different things to look for. i have checked TPS - good, i did not find any obvious vacuum leaks or borken tubes. i have replaced MAP and o2 previously. last year did complete tune, plugs, wires, rotor, cap, fuel filter. i have pulled IAC, was really nasty, im thinking i should pull it again and clean it, bu not sure that is the problem, how can i test the IAC for function? thanks for any help.
Thanks!
-Terry
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Joined: Jul 2004
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From: Hartford WI
Got a scanner?
Pro
Joined: Apr 2000
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From: Jenkintown PA
i have developed a new problem with my car. my engine begins to surge after it becomes warm. also if i have the car in drive and am at a stop with the brake on dose not surge as bad if at all. from what i have found on the search there many different things to look for. i have checked TPS - good, i did not find any obvious vacuum leaks or borken tubes. i have replaced MAP and o2 previously. last year did complete tune, plugs, wires, rotor, cap, fuel filter. i have pulled IAC, was really nasty, im thinking i should pull it again and clean it, bu not sure that is the problem, how can i test the IAC for function? thanks for any help.
SAVE THE WAVE
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Joined: Jul 2004
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From: Hartford WI
I had a similar problem yrs ago with my '91. I checked the injectors (resistance) and several were out of spec.....replaced them and corrected the problem. IF you have originals still in place they are known to cause these types of issues and need to be replaced. Their is a vendor on the forum that many have used. I can not remember his name (John???)
SAVE THE WAVE
SAVE THE WAVE
Pro
Joined: Dec 2010
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From: Shillington PA
I have a similar problem, only its the reverse of the OPs. My L98 surges until it warms up. Once up to temp, it appears to smooth out.
Have not looked into it since its not affecting driveablitly, however Im assuming it has something to do with the car going from open to closed loop.... since it disapears with temp. Maybe the Ops is opposite....
Have not looked into it since its not affecting driveablitly, however Im assuming it has something to do with the car going from open to closed loop.... since it disapears with temp. Maybe the Ops is opposite....
Team Owner
Joined: Jul 2004
Posts: 28,523
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From: Hartford WI
I have a similar problem, only its the reverse of the OPs. My L98 surges until it warms up. Once up to temp, it appears to smooth out.
Have not looked into it since its not affecting driveablitly, however Im assuming it has something to do with the car going from open to closed loop.... since it disapears with temp. Maybe the Ops is opposite....
Have not looked into it since its not affecting driveablitly, however Im assuming it has something to do with the car going from open to closed loop.... since it disapears with temp. Maybe the Ops is opposite....
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From: Hartford WI
That is the old Jenna Jameson. Too bad she doesn't look like that anymore.
Pro
Joined: Dec 2010
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From: Shillington PA
Both of you. What it means is that it is outside the parameters of the open loop program but when it is at closed loop, it still has adjustment capability. Sooner or later, it might fall out of that adjustment window
That is the old Jenna Jameson. Too bad she doesn't look like that anymore.
That is the old Jenna Jameson. Too bad she doesn't look like that anymore.
and ok..... Unfortunately, Im the guy who does not worry about fixing stuff till its broke, so till then..... lol
Team Owner
Joined: Jul 2004
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From: Hartford WI
Then you are also the guy that will spend more later on in general. Remember, when something goes, it rarely goes by itself. It usually tries to take something else out with it.
Pro
Joined: Dec 2010
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From: Shillington PA
