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Old 03-14-2006, 03:27 AM   #11
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Is it loping because the idle is too low or is it the RPM bouncing?
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Old 03-14-2006, 03:31 AM   #12
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yeah well i don't have a 94 or a 95 but mine does that alot, i wish i knoew what it was...it is very irritating...it will sit at about 800 then go down to 500 then jump to 1200 then drop back to 500 in almost and instant...odd..pls help....
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Old 03-14-2006, 10:53 AM   #13
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If you guys need a couple for testing holler..

cost ya shipping to and from.
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Old 03-14-2006, 11:40 AM   #14
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There are many causes of loping idle. If you keep chipping away at it youll find it.
Vac leak
Moisture in fuel
clogged injectors
Faulting TPS that changes the signal
bad or sticking IAC or dirty MAF
sticking PCV
fuel pressure or regulator
sticking valves
These are some of the more common
coil packs
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Old 03-15-2006, 02:27 AM   #15
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If the idle is jumping around my bet is TPS. It has happend 3 times now with Ryan (2 times on the Bonne, 1 time on his Jeep). The price Ryan has to pay for having such a clean engine bay.
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Old 03-15-2006, 09:26 PM   #16
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Marty, haven't you done a TPS mod? And what did the idle do following that?
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Old 03-16-2006, 03:04 PM   #17
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Quote:
Originally Posted by llBlazin_llLo
Is it loping because the idle is too low or is it the RPM bouncing?
Severe RPM flucuations.

Quote:
There are many causes of loping idle. If you keep chipping away at it youll find it.
Vac leak < - No
Moisture in fuel < - Every tank? No.
clogged injectors < - Cleaned, Rebuilt, and flowmatched in Oct. No.
Faulting TPS that changes the signal < New, Nope.
bad or sticking IAC or dirty MAF < Tried 2 IAC'*, and new MAF. Nope.
sticking PCV < New. Nope.
fuel pressure or regulator < Wouldn't cause this issue.
sticking valves < Possible, but you're prolly gonna hear them.
These are some of the more common
coil packs < New MSD'*. Nope
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Old 03-19-2006, 01:16 AM   #18
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I can honestly say, my old Bonneville and this Bonneville both have never idled perfect.
I have never been able to pin point why either...
I've learned to live with it, annoying as it is
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Old 03-19-2006, 05:13 AM   #19
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Quote:
Originally Posted by SSEimatt93
I can honestly say, my old Bonneville and this Bonneville both have never idled perfect.
I have never been able to pin point why either...
I've learned to live with it, annoying as it is
If you ever get a chance to see my idle....you won't just "live with it"....Ask Marty LOL
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Old 03-19-2006, 10:36 AM   #20
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Quote:
Originally Posted by LakevilleSSEi
Quote:
Originally Posted by SSEimatt93
I can honestly say, my old Bonneville and this Bonneville both have never idled perfect.
I have never been able to pin point why either...
I've learned to live with it, annoying as it is
If you ever get a chance to see my idle....you won't just "live with it"....Ask Marty LOL
Sounds like a heavily cammed big block. Very lumpy compared to what it should sound like.
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