The Boy

My MY99 Turbo has been idleing very rough, drinking loads of optimax and have seen a drop in performance. Has been suggested that car was in "safe mode" and dealer said that even though no errors had appeared on Select Monitor they thought the air flow meter had gone and was causing the problem so gave them £100 and they replaced it.

Still got problems. Booked back in but anyone got any ideas...

mega_stream

Have you got a boost gauge?
Any mods?

Access to someone with a deltadash?

dhorwich

O2 sensor...???

Dan

UkLegacyT

mine was idling rough, it was the side of a piston missing due to det.
do a compression test just to be sure. i got 25psi from the offending one

just an idea, ian.

shunty

Dan - what makes you say the O2 sensor ??

shunty

dhorwich

His car was using loads of petrol, and was not idling well...

Increased fuel consumtion can be related to a broken o2 sensor, and poor idle control...

See here:

http://www.bondauto.com/templates/sc...?article_id=20


What Can Go Wrong:

"The result is poor driveability, manifested by one or more of the following symptoms: decreased fuel economy, hesitation on acceleration, stalling, surging, rough idle, and increased tailpipe emissions (with a likely failure of emissions tests, where mandated)."

Dark Blue Mark

I had this on MY 99, they won't see it on the Select unless they are very switched on. Mine had the same symptoms. Replaced the O2 and after a few days it sorted itself. Fit a new one and ECU reset.

MB

Bob Rawle

Agreed, lambda (O2) sensor is the best bet here.

AJbaseBloke

<nod nod> O2 sensor.

Some dealers over here miss it too sometimes (not mine thankfully).

shunty

dhorwich, thanks for the explanation

I see that it goes into the exhaust right near the turbo, thought I would go have a look as I am trying to learn a bit.

shunty

[Edited by shunty - 9/20/2002 8:00:51 AM]

The Boy

Thanks for all the help guys.

Going in tomorrow morning so will ask them about the O2 sensor.

I did have the 02 sensor replaced about 5 months ago. Looks like this is going to be a regular expense

Andy

The Boy

By the way the car is compleatly standard at present but will be going for a PE PowerPack 1 in the next couple of months.

Thanks again

The Boy

Had O2 sensor replaced on saturday and the symtoms went for a bit but are now back.

Anymore ideas guys..........

bioforger

iTrader: (1)

You gave them £100 for the MAF? Theyre usually £300 to replace. U sure they fixed it properly? Or maybe they just replaced the sensors?

SiPie

'1,000,000 to one long shot' but could be 'throttle position sensor'.

Had same problem with mine ater MAF sensor replaced and O2 sensor replaced. Stil idled between 200 and 1000rpm but was constantly searching so took the car for a long (70 mile) drive with as much driving as possible being done at very low revs in 5th gear to help help the ECU readjust to what was going on....

Sorted the prob completely

northernmadbugger

Hey boy - I think you know the answer here upgrade to a nice P1 and let the good times roll.

I hear your in for a good month !!

The Boy

Bioforger-

Sorry. As you said was'nt MAF just sensor/s

SiPie-

Thanks for that i'll give it a try

Northernmadbugger-

Go find me a P1 then you muppet

shocker

do you live in scotland by any chance
shocker

northernmadbugger

No mate exciled to the south but you never forget your roots.....