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[Gorezilla]

I have recently bought a 94 xr2 turbo, Its a great car to drive but if I floor it sometimes the rev warning beeper, beeps prematurely and the acceleration cuts in and out I have my foot down. Any ideas? happens sometimes when i floor it in 3rd but also in 5th gear its doing it at low revs, 4k sometimes

[Rocketman]

Sounds like you have boost creep issues. Do you have an aftermarket exhaust? Running a boost controller?

There is no rev beep, it sounds like you're hitting overboost and the buzzer is sounding.

[Gorezilla]

I don't know much bout turbo set-ups. The previous owner said the was a rev warning, could be bull!@# for all I know. But there's a beeping noise that sounds when the revs get high signalling that you should shift up into the next gear. Most of the time this is seems accurate.

I think the exhaust is stock, there is a boost controller on there but a friend says that its a pretty cheap one, I don't think it has a beeper on it. I'm pretty clueless when it comes to that sort of stuff though.

[Rocketman]

If you remove the boost controller you'll stop hitting the boost cut.

[Gus Kelley]

Hey Gore! You're focusing on RPM, but what does the boost gauge show at these points? That is one additional clue we need to possibly help you.  Gus

[Gorezilla]

The boost gauge on the dash seems a bit out of whack, even when the turbo isn't going and i'm puttin' along, it reads at about a quarter on the gauge and on boost goes way off the gauge. over boosting could definitely be the problem. but its hard to tell when the gauge isnt reading correctly

[Gorezilla]

Thanks alot by the way for trying to help, its much appreciated

[Gus Kelley]

Hey Gore!  From what you're saying, it sounds like the boost cut-off is coming on. It is a solenoid on the fire-wall with a two wire lead. Just un-plug it and the jumping will stop. Now the mystery begins as to why it's engaging. You'll need to adjust the controller. You don't want to boost above 10lbs with a modified ECU. The boost limit comes on at approximately 11lbs. With-out a rocket-chip in place, you could likely start to burn pistons when above 11lbs. The stock ECU only handles proper fuel Air Fuel Ratios (AFR) up to 11lbs. The Rocket-chip ECU handles to 19lbs approx. and jumps the red-line higher to approx 7000rpm.  Gus

[CapriTypeR]

Correct me if I'm wrong, Rocket, but can't you adjust the red-line per user specs?  I know the Rocketchip I have is good for 7500 RPM! Don't ask me how I know...........  :cool:  

--Russ

[Phillip]

Don't unplug anything! If you don't find the problem you could trash the motor.
It sounds like a bad vacuume hose to the boost controler to me. If it's a cheap controler that could be the problem Rocket is right delete the controler and re hose the system. The problem should go away.

[Rocketman]

Yes, dont go unplugging the boost cut until you find out whats causing the overboost. I'm guessing the controller is set just a bit too high and it keeps cutting out on you.

[Gorezilla]

ok thanks alot ill try it and get back too you.