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Discussion Starter · #1 ·
Ok I'm having a recurring problem with my 99 Sable with a Tec. Whenever I come up to a stoplight, the car chugs while I'm just sitting there. It does it in park, reverse, neutral and drive so I know its not a transmission problem. I just replaced a vacuum hose and PCV valve. I dont know what else it could be and its annoying! It doesnt die anymore like it use to but it will drop 100-200 rpms and go back to normal and repeats this in short intervals. No codes from this. Any ideas?
 

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Maybe clean iac, maf, tb and/or check for another vac. leak? Lotsa possibilities between the uim and firewall.
 

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Discussion Starter · #3 ·
Maybe clean iac, maf, tb and/or check for another vac. leak? Lotsa possibilities between the uim and firewall.
The MAF is the one off my taurus so I know its still good. I also cleaned it before i installed it. IAC looked fine when I last took it off to fix the bad vacuum line.
 
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