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colibry
03-05-10, 21:39
Hello.

Can someone please tell me what could be wrong and what should be checked to fix my accel above 3000-3300rpm. Its like its limited at 3000-3300rpm...

any ideas?
AlfaJack
03-05-10, 23:52
How does it go up to 3300rpm? Is it lumpy and bad to drive and running rich?

I would check the map sensor connection and for any other air leaks from the small bore hoses.

Anything strange in the throttle pedal?

You could also try disconnecting the water temp sensor and see if it makes a difference.
Juan AR155Q4
04-05-10, 13:19
What about boost during rev up? Maybe overboosted by a faulty WG?
colibry
04-05-10, 16:54
Yes. Accel is lumpy and allmost impossible to drive. well u can drive but realy SLOW... :D WG and Turbo are totaly new with 0km. A throtle paddle is cool. nothing suspicious. ill check map sensor connection as alfajack adviced and all hoses for airleaks.

any other ideas?

TnX Ivan
Brul(tm)
04-05-10, 17:43
Yes. Accel is lumpy and allmost impossible to drive. well u can drive but realy SLOW... :D WG and Turbo are totaly new with 0km.

Had the same kind of problem a couple of years ago when I replaced my exhaust manifold and the turbo.
I think you need to check the waste gate if it opens and/or if the hoses from the pier burg valve are conected correctly.

Regards,
Marc
AlfaJack
04-05-10, 17:55
Even with stuck wastegate etc it would not be lumpy and difficult to drive.

This sounds just like an air leak or a disconnected map sensor.
1NRO
04-05-10, 19:21
Crank sensor faulty or the clearance to the trigger wheel is off maybe. If it has a violent jolt at 3500ish it is almost certainly is.
colibry
04-05-10, 22:36
@1NRO : i was given the same info from member axa.. ill check that to.

tnx
kepsus
08-05-10, 07:42
Does you ECU injector light up..IF you have a sensor fail, you ecu would block the rpm to around 3500 (can't remember excact but i can look at the program)
Q4-Dave
09-05-10, 19:35
my behaved similar recently, I found that it was a broken ignitionwire that at certain revs the spark jumped at the middle of the cable to nearest metal instead of giving the spark to the sparkplug..

don?t know if this is of any help..

good luck

David