spit and sputter


Old 09-15-03, 04:16 PM
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spit and sputter

I have a 1990 Chevy Lumina APV minivan with a v6. At idle the engine sounds really rough and at acceleration there is hesitation. It runs rough till up to speed then runs fine.
The check engine soon light comes and goes. Changed plugs and also changed the air temp control module on carb. cover.
Any ideas before I take it to the shop. Thanks for the help.
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Old 09-15-03, 04:19 PM
Join Date: Dec 2002
Location: Connetisuck
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How are the plug wires?
Old 09-15-03, 04:24 PM
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sorry about that--changed plug wires too
Old 09-15-03, 06:57 PM
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Join Date: May 2003
Location: USA
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Have you put a scan tool on it to see if there are any stored codes? This would be the first place to start.
Hope this helps ya,
Old 09-15-03, 08:40 PM
Join Date: Mar 2002
Location: Louisiana
Posts: 438
Sounds like MAP Sensor vacuum leaking but could be a number of things. Go to AutoZone and they'll read your codes for free. You may want to post reading before you start buying parts. A lot of these sensors affect each other's performance and coding. 1990 ECM trouble codes are not nearly as detailed as the newer autos.
Old 09-16-03, 03:55 AM
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Thumbs up

All posters are correct.

Start with my "The Basics" below,and using autolibrary to guide you (If you don't have a shop manual and you should....) to test parts before throwing more parts at the problem (which won't do anything but drain your wallet and leave you with a still broken vehicle).

Pull your codes first as Billy said and we'll go from there.
Old 10-05-03, 07:28 AM
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problem solved

Took the van to the shop--problem was the EGR sensor. Thanks for the advice everyone. Van runs like a dream again.
Old 10-05-03, 07:42 AM
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Glad it's fixed.

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