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1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 02-08-2009, 06:14 PM   #1
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1st post here guys
91 Bonneville se 150,000 miles wife'* car
today i added about a quart of ATF to the trans wife took the car shopping she called and said she was having trouble keeping it running. i did find a vacuum line that was bad and replaced it. is there a chance the that the Modulator is bad? still won't idle right after i replace the line
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Old 02-08-2009, 06:17 PM   #2
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Just adding some trans fluid shouldn't effect the idle like that. Something else is al play here. Did she drive threw any water? What is the idle doing? Is it just running slow? Or is it jumping around?
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Old 02-08-2009, 07:46 PM   #3
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it just shuts off in park or drive. it will stay running if i keep my foot on the gas. kinda sounds like egr valve to me. where do the 2 vacuum lines go that come off the modulator?
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Old 02-08-2009, 07:50 PM   #4
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Yes, check the EGR for vacuum leaks, one tube comes from the rear exhaust mainfold and the other goes to the LIM. If no leak then check for a stuck pintle in the EGR. Another thing to check is the PCV valve.
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Old 02-08-2009, 07:58 PM   #5
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AAAAH the pcv didn't think of that
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Old 02-08-2009, 08:00 PM   #6
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BTW Dan my wife would love to own your car!!!!!
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Old 02-08-2009, 08:01 PM   #7
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My baby?
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Old 02-08-2009, 08:28 PM   #8
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this is my baby
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Old 02-08-2009, 08:32 PM   #9
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Nice. But that do so good in the snow.
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Old 02-08-2009, 08:36 PM   #10
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no but this does
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