Flat-No power above 3000rpm

[aloveridge]

Hi,
I was hoping someone could help with advice.

I've got a 2001 subaru WRX which has just had a power engineering engine
tune - exhaust + remap+etc. Very good...
Unfortunately, somethings just failed - it's now undriveable - it will die
if the throttle is pressed when driving - although it's possible to drive
(managed to get home) with vitually no throttle 3rd gear 3000rpm.
Power engineering are unwilling to send anybody out with a laptop (I am
certainly not going to drive it 100miles to London), and I fear my warranty
is now void.

If anybody recognises the problem I would be very grateful for advice - may
be it's something simple like a loose with on a sensor?.....

Best regards,
Adam.

 

[Edward Hayes]

First look to a plugged fuel filter or a very bad load of fuel. eddie

 

[4Banger Blues]

I had the same problem with my '97 and the fuel filter was the fix.

 

[Yousuf Khan]

Hi,
I was hoping someone could help with advice.

I've got a 2001 subaru WRX which has just had a power engineering engine
tune - exhaust + remap+etc. Very good...
Unfortunately, somethings just failed - it's now undriveable - it will die
if the throttle is pressed when driving - although it's possible to drive
(managed to get home) with vitually no throttle 3rd gear 3000rpm.
Power engineering are unwilling to send anybody out with a laptop (I am
certainly not going to drive it 100miles to London), and I fear my warranty
is now void.

If anybody recognises the problem I would be very grateful for advice - may
be it's something simple like a loose with on a sensor?.....

Geez, if you hadn't mentioned that you had your beast modded, we'd probably
have a lot of solutions. I was originally going to suggest making sure that
your air filter was replaced properly. My 2000 OBW had a power drop off
because of an improperly mounted air filter once.

But since you had your car modded, I'd definitely get to London if that's
your only solution.

Yousuf Khan

 

[aloveridge]

Thanks for your help/advice.

I'm attempting to get it done on the warranty, The guy that came out
suggests it either the mass airflow or lamhda sensors. It needs to go to a
dealer - apparently not many people have the right diagnostic gear.
Unfortunately Subaru have closed a lot of dealerships down and everywhere is
quite busy!

Lucky it happened inside 3 years I guess - Would like to read the error
codes from the ECU myself. Does anyone know how to do it with an
oscilloscope? Mind you I see that you can get ISO OBDII interfaces for
$50... Any advice much appreciated.

Regards,
Adam.

 

[aloveridge]

Just to update.

Subaru would not touch it, due to it having a different exhaust and the fact
the codes were showing p0545, p1301,p1544, and two more - the other two were
caused by the truck driver trying to diagnose the problem.

I did some searching and found that the Exhaust temperature sensor could be
at fault and that a 2.2K ohm resistor could cure it. - It did. After 3
journeys the malfunction light dissapeared.

I have since purchased an OBDII reader from the States. I plan to clear the
codes and replace the faulty temperature sensor.

I guess with a decatted up pipe, the sensor life is reduced. - I believe the
sensor must act as warning device as well as an indicator for emission
performance.

Does anybody know how to prolong the life of these sensors?

Regards,
Adam.