Code 34 issue

[Dahlgaard95]

Hello i have a MK3 from 1990 with an automatic gearbox.

But when i am making a hard pull, and when it changes gear or i let off the gas at high rpm the engine stalls.

The only code i am getting is code 34.

I have just re torqued my intercooler piping, its a 2,5'' intercooler system with a 3'' thick core.

I have installed a manual boost controller (oem turbosmart) which right now is set to the lowest due to the engine codes.

Also i have is a original turbosmart dual port blow off which is recirculating, but i dont know if the spring is too hard or soft?

Have tried with another afm sensor with no luck.

No connection between afm and turbo is loose.


What could be my issue?


I am only boosting 6 psi.

 

[GC89]

Do you have an aftermarket boost gauge or are you guessing 6 psi off of the stock one?

Could be hitting fuel cut.

 

[Dahlgaard95]

Do you have an aftermarket boost gauge or are you guessing 6 psi off of the stock one?

Could be hitting fuel cut.

Yes aftermarket boost gauge, and i do not have shims behind the wastegate, so i think its true.
Sounds crazy to me if it is hitting fuel cut with stock boost and the following mods, 3 inch dp with testpipe, and bigger intercooler with 2,5'' hardpipes, also a k&n.

 

[f00g00]

Check all vac lines for connections and splits and cracks.

 

[Rollus]

Same as f00g00 plus:

I have installed a manual boost controller (oem turbosmart) which right now is set to the lowest due to the engine codes.

Check you MBC installation

 

[hvyman]

Perform a boost leak test. That will tell you.