Whats causing it to cut out??! help!

[dylansword]

I have an 87 turbo. It has after market IC and piping. Translator pro maf elimator, and fulll 3 in exhaust. My problem it, when I hit 3500-4000 rpm the engine cuts out and dies till I take my foot out ot the throttle. It has a new tps, spark plugs and wires and fuel filter. I set my boost controller for 7psi. Anyone have any ideas of what it may be? Thanks

 

[Wildfire007]

Its probably stupid to ask but do you have an Air Filter? lol My 88 did the exact same thing until I bought an adapter and managed to fit an Air Filter to it. Granted I still have the AFM.

 

[Turbo Habanero]

He's running a maft pro but sounds like its not setup wrong.. sounds like your car is still wanting that AFM.

Make sure you got the right TPS sensor also there are alot of different one's for our cars and Autozone/Checkers likes to give people the wrong one's. and since yours is a 89 there are 2 that where for that year late model and early model.

I think in the Future you might want to put this in the 7m Tech area

 

[TurboStreetCar]

Is your boost going above 7 psi?

Can you use the maf translator to monitor the AFM Signal frequency? If its going above 1500 its likely fuel cut.

If you have a Wideband and your going very rich it would be another way to tell.

When i had the MAFTgen 2 i would hit fuel cut at 11psi and i was pulling fuel. If your not pulling any fuel with the translator you may be hitting fuel cut. Do you have an aftermarket boost gauge or just the stocker?

 

[Turbo Habanero]

Can you use the maf translator to monitor the AFM Signal frequency?

I thought he was saying he used the maf to eliminate the AFM

 

[dylansword]

It does not have a mss air flow sensor. That is what the translator is for.

I don't have a wideband, I plan to get one. As far as the tps, I am not sure, the guy I bougt it from just replaced it, so I will check it.

The highest the boost ever goes is 9.5. The boost controller is set at 7 psi right now. I am suspecting that it is hitting fuel cut prematurily, or the fuel pump is weak. So I am going to check the pressure when I get home.

Anything else it could be?

 

[Turbo Habanero]

My problem is, when I hit 3500-4000 rpm the engine cuts out and dies till I take my foot out ot the throttle.

this makes it sound to me that the ecu is not seeing the afm signal. if i unplug my afm same thing will happen to me when i drive. so maybe there is a problem with you MAF setup.

from my experience fuel cut won't make the car decell it just jerks really hard

 

[dylansword]

I'm sure its not the maf. When I bought the car, the guy thought it was the maf and bought the translator from his friend. It did this before and after I installed the translator.

 

[Turbo Habanero]

I'm sure its not the maf. When I bought the car, the guy thought it was the maf and bought the translator from his friend. It did this before and after I installed the translator.

hmm then i would think it would be the TPS if your sure did you check engine codes? cause if 34 does not pop up your not hitting fuel cut

 

[TurboStreetCar]

I thought he was saying he used the maf to eliminate the AFM

It does not have a mss air flow sensor. That is what the translator is for.

I don't have a wideband, I plan to get one. As far as the tps, I am not sure, the guy I bougt it from just replaced it, so I will check it.

The highest the boost ever goes is 9.5. The boost controller is set at 7 psi right now. I am suspecting that it is hitting fuel cut prematurily, or the fuel pump is weak. So I am going to check the pressure when I get home.

Anything else it could be?

I understand that he's using a translator. No matter what piggy back you use there's still an AFM signal in the form of a frequency bieng input into the stock tccs.

The maft translates either a speed density signal or gm airflow signal to the stock signal. That's why it's a translator.

Either the signal wire into the stock computer is not connected properly. Or the frequency output to the stock computer is going over approx 1500hz and causing fuel cut.

 

[Turbo Habanero]

I understand that he's using a translator. No matter what piggy back you use there's still an AFM signal in the for of a frequency bieng input into the stock tccs.

The maft translates either a speed density signal or gm airflow signal to the stock signal. That's why it's a translator.

Either the signal wire into the stock computer is not connected properly. Or the frequency output to the stock computer is going over approx 1500hz and causing fuel cut.

oh ok got ya.