Need help - 2001 gtx di

[Papa Jules]

Hello, I need some help.
Spend now hours over the winter after buying a 2001 gtx di in Germany which was dead.
Did lots rework, bought many parts in USA. (Europe you get almost nothing or only overpriced) all runs now.
Only problem I have it won’t go full throttle.
Please hear the sound. By the end of the video it’s full throttle, but it is not going over ~ half.
Like too much air, not enough fuel or the other way.
Would be so glad to get help from experienced people
Thank you so much.

 

[mikidymac]

Ouch, a bad running DI is not a easy thing to fix.

I would say you need to verify you have exactly 107 psi of fuel pressure when running at all rpm's. Very common for the fuel pumps to lack pressure and all of the aftermarket ones are junk.

 

[Papa Jules]

Thank you. So guess would be fuel pump in this case. Any suggestions on which fuel pump to buy on Ebay?

 

[mikidymac]

There are none on ebay, all aftermarket ones are junk. I suggest checking the fuel pressure before you buy a $750 OEM pump.

 

[tkarvelis]

OEM Only. Search the forum on replacing the 3 fuel filters, and cleaning the pump with gas and toluene.
mixture.

 

[Papa Jules]

Ok. You saw and hear video? So all guess goes to low fuel pressure. Either pump or filter/line.