my 99 gsr has all the crap msd, 18g turbo, gears, uberdata, rtp kit, 450cc dsm injectors, any way the rpms bounce at 3250 like a rev limiter but the uberdata has all the stuff set correctly but this rpm issue is driving me mad. any help is great

 

Any codes being thrown? Check the ignitor and make sure it's grounded. I had the same problem for a while on my car and my friend's.

Anyway, what are "gears"? Did you modify your gearing/final drive? Just wondering because the GSR gearing is one of the most efficient for overall acceleration and gas mileage.

 

igniter do you mean coil or what

 

yes there are codes but the car has been converted to obd1 and i have yet to figure out how to get the codes out, the gears are cam gears

 

there is a little plug that you have to jump the two wires and the code will flash on the cel. the plug is located on the passenger side of the dash near the kick panel on most conversions...

 

iacv?

 

I was thinking the IACV, it's free to adjust. So you may want to start there. Then start to check for CEL.

 

tried the plug and the cel just stayed on no blinking

 

how do you adjust the iacv , i have also checked the ignitor and it still did the rpm bounce thing

 

Are u saying that this happens at idle? Or does it happen when ur driving and u just can't rev past 3250 rpms? Also u should jump ur service connector to find out what codes ur getting.

 

it wont rev past 3200, jumping the plug does nothing the cel just stays on

 

found the prob the ecm was bad put a new one in and ran great time for the tune w/ wide band