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Thread: need help please rough idle

  1. #1

    need help please rough idle

    Ok so I just upgraded to a tvs2300 from a 112 Maggie been on truck for about two weeks since then I have a very unstable idle. by using the bi directional controls in the scanner I can make it run smooth by commanding a 12.0 AFR at idle im thinking I have a vacuum leak but I would think I would see that in my fuel trims but they seem to be equal. I don't know what to do other then pull off blower and change gaskets. Cam is very mild so I know it shouldn't be this hard to dial in. PLEASE look over my tune and tell me if Im missing something in the tune.
    Last edited by blown 04; 08-05-2013 at 05:22 PM.
    03 SS Silverado,tvs2300,ID850,gt2-3,kooks, PRC 317'S,

  2. #2
    motor seems like it runs the best when I command 11.5, moving timing around does not seem to change anything. My map reading goes from 36 at 14.7 to 33 at 11.5. I have tried spaying around lower intake on blower but I haven't found any change in engine while spraying. Any thoughts?
    03 SS Silverado,tvs2300,ID850,gt2-3,kooks, PRC 317'S,

  3. #3
    made a log going to work this morning ''6 miles'' truck also does not start good on the first start of the day or it has to sit about 8 hours. I must overlooking something but I cant figure this out.
    03 SS Silverado,tvs2300,ID850,gt2-3,kooks, PRC 317'S,

  4. #4
    Senior Tuner SultanHassanMasTuning's Avatar
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    whats your injectors?
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  5. #5
    the injectors are what comes with the blower 42lb marine injectors.
    03 SS Silverado,tvs2300,ID850,gt2-3,kooks, PRC 317'S,

  6. #6
    I did another log going home from work. I noticed that when I first start the log the trims were very negative then as I drove they leaned out some, is this due to slow, old o2s 78000 miles or is it the headers and o2 placement. I have searched for any adjustments that need to be made to the o2 tables to correct for the further away placement in the exhaust.What I would like someone to tell me is by looking at these logs does it look like I have a vacuum leak?
    03 SS Silverado,tvs2300,ID850,gt2-3,kooks, PRC 317'S,