stumble at higher RPMs
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Joined: Jun 2002
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stumble at higher RPMs
Hope someone can help me with this one. Just got my car back from the shop. Got MSD coil, 8.5mm wires, and Delco Rapidfire plugs. I've been noticing that sometimes around 2800 rpms the whole car shakes a bit then straigtens itself out. Doesn't always happen, but enough that I have noticed it. It is a manual transmission, 5.0 TPI. Not sure if it is a result of the work done, but just wanted to get input. Thank you.
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From: Nashville TN
Car: 1989 Trans Am
Engine: 355 HSR
Transmission: Pro-Built 700r4 w/ 3400 converter
Axle/Gears: 10 bolt w/ 3.42 gears
is it under part throttle or WOT?
maybe too much timing at that RPM... had that happen to mine when i bumped the initial timing up too much!!
maybe too much timing at that RPM... had that happen to mine when i bumped the initial timing up too much!!
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Joined: Dec 2001
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How confident are you in those rapid fire plugs? I havent had much luck with them. I've done a couple tunes with them, per my friends requests and got terrible performance. Stumbling, terrible throttle response, and such. 
Hope ya fix it!
- Tom
Hope ya fix it! - Tom
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Joined: Jun 2002
Posts: 3,331
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From: Welland, Ontario, Canada
Car: 85 Monte Carlo SS...
Engine: T.P.I L98.
Transmission: TH350
Axle/Gears: 3:73 Posi
For TPI engine, there is only one type of spark plug to use...Original Ac Delco plugs. This will help.
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