1G rev limiter or fuel cut?

[leathaltsi]

I have a 90 awd my tach dont work. I have a 16g and 2.5 turbo back exhaust and a mbc set at 15psi. my reves jump so fast when i hit boost it hits the rev limiter before i have a chance to shift. the power band doesnt drop off it feels like i have alot more left 1st gear runs up to 25, 2nd 45, 3rd 65 is this normal i figured 3rd went farther than that are fwd geared different than awd

 

[rarson]

I have personally had a clutch that was slipping. You could not tell it on the highway.

When the clutch slips, the car slows its rate of acceleration and you can hear the revs increase. It's very obvious. If you don't notice it while you're driving, you're not paying attention to your car.

You said "If you hit fuel cut, you'd most likely be checking your rear view for transmission parts."

All he was saying is that fuel cut is very jarring. There's no way to mistake fuel cut for a rev limiter, because fuel cut feels like you broke something.

Why don't you guys try going up to the rev limiter not at WOT? Give it 1/4 throttle and see how high it goes. It's possible maybe you're just getting ignition breakup. I would suggest checking the spark plug gaps first. Personally, if my plugs are gapped .029" or above, then my spark gets blown out under full boost and I get WOT misfires (makes a lot of popping, but it's not a brick wall feeling like fuel cut).

 

[rarson]

OP I just looked at your profile and it says you are using a maf-t. Are you no longer using the 1g maf? If you are no longer using the 1g maf and are actually using the maf-t and a gm maf then I would not say your problem is fuel cut. I could forsee a possibly lean condition but not fuel cut.

This is wrong. A MAFT simply translates the output of the GM MAF to the same output as a DSM MAF. It's possible that you could lean the signal out with the MAFT and avoid fuel cut, but if the MAFT is setup correctly, and you're still using a stock ECU, the GM MAF will cause fuel cut at the exact same amount of airflow as the stock MAF.

What the MAFT helps eliminate is MAF overrun, which has nothing to do with fuel cut (you can't eliminate fuel cut without changing the ECU).