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Home -> Forums -> Engines -> Rallye Idle Saga Continued

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Author Subject: Rallye Idle Saga Continued
scott8629

Regular

Location: Hull

Registered: 11 Feb 2006

Posts: 275

Status: Offline
Post #1
I have changed the stepper motor last night, the motor looked slightly different but I fitted it anyway and reset the ECU all seemed well on the drive home. I started it this morning and the revs were bouncing between 1k-2k RPM, not good.

So I am thinking lambda sensor or throttle position sensor?

I have checked for air leaks and there seems to be none.

I think my manifold is leaking slightly so could that be a problem.

I may disconnect the lambda sensor....

Any ideas lads, im starting to get dis-hartend with the Rallye
Posted 8th Sep 2009 at 13:12
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jcphat

Seasoned Pro

Location: In the day room, Nurse!

Registered: 22 Feb 2008

Posts: 1,061

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Post #2
"I think my manifold is leaking slightly so could that be a problem"
Yes Indeedee!!
No amount of sensor work will resolve the situation if there is air getting in after the TB!

________________________________________

New Forum same high quality intellectual debate!
Team Zimmer™
Posted 8th Sep 2009 at 14:29
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scott8629

Regular

Location: Hull

Registered: 11 Feb 2006

Posts: 275

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Post #3
Damn! Thats going to be expensive.

But before I splash the cash I will try the sensors, as after an ECU reset the car behaves itself, I am thinking if it was the Manifold it would be reving between 1-2k RPM all the time.

Does anyone have a picture/locations of all the sensors, Power steering, Lambda and TPS?
Posted 8th Sep 2009 at 14:41
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xsi-in-stealth

Junior User

Location: carshalton

Registered: 08 Aug 2009

Posts: 84

Status: Offline
Post #4
Inlet manifold? or exhaust manifold? if its the Inlet manifold you can pick them up for around

________________________________________

16V-XSi
Posted 8th Sep 2009 at 16:20
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scott8629

Regular

Location: Hull

Registered: 11 Feb 2006

Posts: 275

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Post #5
Exhaust manifold
Posted 8th Sep 2009 at 16:48
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scott8629

Regular

Location: Hull

Registered: 11 Feb 2006

Posts: 275

Status: Offline
Post #6
Disconnected the steering sensor, seems to be behaving now!
Posted 9th Sep 2009 at 00:41
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bigbadbowen

Seasoned Pro

Location: Winchester

Registered: 21 Nov 2003

Posts: 13,753

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Post #7
Power steering sensor is a good culprit for dodgy idle now adays Wink
Posted 9th Sep 2009 at 05:01
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scott8629

Regular

Location: Hull

Registered: 11 Feb 2006

Posts: 275

Status: Offline
Post #8
anyone have a spare power steering sensor?
Posted 9th Sep 2009 at 13:22
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scott8629

Regular

Location: Hull

Registered: 11 Feb 2006

Posts: 275

Status: Offline
Post #9
Oh dear!!! Its started again.

However it seems to be ok if I switch the ignition on for 15 seconds and then start the car.

Very puzzled. Any ideas.
Posted 10th Sep 2009 at 14:27
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scott8629

Regular

Location: Hull

Registered: 11 Feb 2006

Posts: 275

Status: Offline
Post #10
UPDATE

This has been getting steadily worse.

Sometimes when I turn the engine on it will rev hard, but the dashboard will be have no reading what so ever on any gauge, then gradually indicate 4K RPM, then as you pull off the revs will bounce from 1k-2k

I have been taking the battery off for 10 mins or so and doing an ECU reset and this seems to cure it for a day, then back in the morning (cold temps?) it will repeat the 4kRMP and no dash dead for a few seconds etc.

I did change the stepper motor but it looked slightly different to the one previously installed (shorter head).

Just so I can test the sensors can anyone point me in the direction of what resistance readings the CTS and TPS (and the TPS location) should be.

TIA

Scott
Posted 9th Oct 2009 at 13:35
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roland rat

Yeeeah Rat fans!

Location: Swansea

Registered: 29 Nov 2006

Posts: 22,284

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Post #11
Hey Scott theres and FAQ with all the sensor info you need Thumbs up
Posted 9th Oct 2009 at 14:22
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scott8629

Regular

Location: Hull

Registered: 11 Feb 2006

Posts: 275

Status: Offline
Post #12
roland rat wrote:
Hey Scott theres and FAQ with all the sensor info you need Thumbs up


Thanks found it!

Does anyone know the location of the TPS?
Posted 9th Oct 2009 at 16:24
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adam b

Seasoned Pro

Location: The Nam

Registered: 24 Jan 2006

Posts: 12,828

Status: Offline
Post #13
Yes under the throttle body butterfly. Generally these don't feck up the idle though - they make the car run crap and give you a huge lag on the accelerator.

________________________________________

Nothing to see here
Posted 9th Oct 2009 at 16:44
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gti6girl

Seasoned Pro

Location: Dartford

Registered: 19 Feb 2007

Posts: 2,692

Status: Offline
Post #14
Whip the inlet manifold off and check the gasket. They are a couple of pound from pug
Posted 9th Oct 2009 at 17:10
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scott8629

Regular

Location: Hull

Registered: 11 Feb 2006

Posts: 275

Status: Offline
Post #15
Another thing,

I have just drove from Rotterdam to Hamburg (@90mph) and then to work and back 3 times, I think I will get around 420 miles+ from a brimmed tank.

Good fuel economy!
Posted 9th Oct 2009 at 21:37
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