3B wot problem

[lynx]

Hi,

Actually it' s my friends audi 200, but still 3b engine, so maybe someone could help.

He bought car without engine 2 years ago and now tried to start the car with "new" engine.

Main problem is WOT. When I press WOT, engine going to "choke", in any rpms and going to lose rpms. Looks like ingnition is retarded, because in this time turbo starts to spool, even rpms goint to drop.

When I trie to play with throttle, all seems to ok, no matter what rpms but as soon as I make pedal to medal, problem there (no matter, if car idles or running).

So far tested:

Another ECU/TPS/MAF,nothing.

what may cause this thing?

thanks,
marek

[Rusty]

Check the ECU grounding is correct on the engine, same for the coil packs. BTDT.

[Knight Rider S4]

Hot or cold ...does the fault happen?

[lynx]

Check the ECU grounding is correct on the engine, same for the coil packs. BTDT.

Ground OK, 3b have only one coil

Hot or cold ...does the fault happen?

No matter

thanks,
marek

[20Vcqdriver]

Maf

Sounds exactly like the issue I had a few weeks back, turned out to be the MAF faulty.

[newsh]

Yes, MAF or a boost leak.

[lynx]

as I said before, we have tested another MAF (with is working perfectly other car), and tested boost leaks, nothing.

what else could I check?

thanks,
marek

[20Vcqdriver]

Can you hear the throttle switch working? If its still in idle mode it will cause same issue.
Best to get VAG-COM attached and see what codes come up.

[s2driveruk]

boost leak if it feels like its 'bubbly' at wide open throttle IMO

[lynx]

Can you hear the throttle switch working? If its still in idle mode it will cause same issue.
Best to get VAG-COM attached and see what codes come up.

I have changed TPS, witch also working just fine with other car

Vag - com doesn' t see any problem with the engine - no any fault code.

boost leak if it feels like its 'bubbly' at wide open throttle IMO

We tested yesterday intake and with 1,5bar and there was zero leak.

thanks,
marek

[tgriff]

check what plugs you have my 3b did similar at wot ,turned out to be crap champion plugs fitted by previous owner

[anton]

i thought at wot these cars went to set map, as in only maf and hall sender have input? have you checked hall sender? also could be anything ignition related, i had a faulty hT lead but only ever misfired on full throttle. lack of a good spark can feel like 'choking'

Ant

[urquattro-island]

sounds

like the problem i had, and it turned out to be, one of the little hoses at rear of IM. check them was just a little hole.. and after it was fine

[lynx]

thanks all who tried to help, it was broken maf wire

thanks,
marek