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Runs rough and bogs below 2500 rpm..

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tbird

20+ Year Contributor
170
2
Nov 10, 2002
Hey guys on to the next problem!! I have replaced pretty much every sensor in the car, Maybe I have looked over somthing small..

91 Tsi Auto car, 450cc injecors, 3" exhaust, safc -15% to correct for manual injctors. I set the timing to 5* with the pin grounded. idle around 7-850 ..


Anyways at idle the car almost sonds cammed, runs very rough if I give it gas it bogs out unless I flutter the pedal to keep it running,, when its cold it runs worse than warm.. but if I drive it and get it up to around 2500 rpm it totally smooths out and runs pefect... so really this is only an idle/low rpm problem.....
I am putting in a 2g mas air in the next day or two.. and going to check for more boost leaks but other than tha it I am out of ideas.... any input would be great, I dont have alot of time to search for answers!
 
sounds like a fuel/spark issue...! mine used to do the same thing and had to change the ignition coil, sparkplugs gaped the right way, sparkplug wires, and had my bov vacuum line disconected...!
 
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