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2nd Generation
need help. engine stumbles.
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<blockquote data-quote="p5.0" data-source="post: 11248182" data-attributes="member: 78811"><p>Hi All,</p><p></p><p>1st off here are my mods. </p><p>4lb lower pulley</p><p>CAI</p><p>Flowmaster exhaust </p><p>Mafia</p><p>SCT tune...</p><p></p><p>its on 01 L</p><p></p><p>My symptoms are:</p><p>idle seems fine </p><p>no CEL</p><p>my truck under boost and at 2500rpm starts to stumble and hesitate. I can reach up to 70mph but with out getting on the gas. i dont know if its missing or detination. (dont know the difference)</p><p></p><p>this is what i have done.</p><p>cleaned mass air and filter</p><p>changed spark plugs and coils packs seemed fine. </p><p>tired reseting the tune </p><p>looked for air leaks had 2 from rubber elbows (fixed)</p><p>reset mafia</p><p></p><p>i tried changing out the IAC and when i did that when i reved the engine up the intake made some wierd honing/howling sound. i felt the mass air it was shaking wierd. iunno but when i put back the old IAC it didnt do that. </p><p></p><p>now im stuck i need help. suggestions. </p><p></p><p>I was gonna chance my 02 sensors but my CEL has not came on. </p><p></p><p>thanks</p></blockquote><p></p>
[QUOTE="p5.0, post: 11248182, member: 78811"] Hi All, 1st off here are my mods. 4lb lower pulley CAI Flowmaster exhaust Mafia SCT tune... its on 01 L My symptoms are: idle seems fine no CEL my truck under boost and at 2500rpm starts to stumble and hesitate. I can reach up to 70mph but with out getting on the gas. i dont know if its missing or detination. (dont know the difference) this is what i have done. cleaned mass air and filter changed spark plugs and coils packs seemed fine. tired reseting the tune looked for air leaks had 2 from rubber elbows (fixed) reset mafia i tried changing out the IAC and when i did that when i reved the engine up the intake made some wierd honing/howling sound. i felt the mass air it was shaking wierd. iunno but when i put back the old IAC it didnt do that. now im stuck i need help. suggestions. I was gonna chance my 02 sensors but my CEL has not came on. thanks [/QUOTE]
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