Omega Owners Forum - Erratic Tickover

DeRangeRC

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Taking it on one job at
a time.

Posts: 16
The Peak District (mostly)
Gender: male

Drives: 1999 Omega GLS 2.0 Auto

Erratic Tickover - Hunting.
22. Jul 2011 at 10:19

Sorry if this has been covered before in here but work means I only get a few minutes to look !! Roll Eyes

After cleaning out the IACV and all relevant breathers last night (found a very good guide on here) I took her for a test run up to temp and when I pulled up on the drive the tickover fluctuates and hunts between 1000rpm & 2000 ish rpm Embarrassed

What are the steps to diagnosis ? What would be the next thing to check ?

Good news is cleaning the IACV has stopped the intermittent stalling !!

Need to do some miles in her from Thurs next week and at the moment I dont trust it to the bottom of the road!!

??????

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If its rusty cut it out.
If its dry, oil it.
If its dull, shine it.
If its stuck.......smack it with a hammer of course !!

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Shelby Intermediate Member Offline Posts: 277 Sleaford, Lincolnshire Gender: Drives: Mini facelift, 1999 2.0l CDX	Re: Erratic Tickover - Hunting. Reply #1 - 22. Jul 2011 at 10:27 Did you do right down to and including the breather jet (not just breather hoses)? I had exactly the same problem on mine and after doing all the breather hoses and jet it made a world of difference. Never stalled again and idles solidly at around 6-700 rpm.
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RobG

Omega Lord

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I might have a link, pic
or part number for that

Posts: 7968
Bristol
Gender: male

Drives: 53 plate 2.2 CD auto

Re: Erratic Tickover - Hunting.
Reply #2 - 22. Jul 2011 at 10:39

DeRangeRC wrote on 22. Jul 2011 at 10:19:

Sorry if this has been covered before in here but work means I only get a few minutes to look !! Roll Eyes

After cleaning out the IACV and all relevant breathers last night (found a very good guide on here) I took her for a test run up to temp and when I pulled up on the drive the tickover fluctuates and hunts between 1000rpm & 2000 ish rpm Embarrassed

What are the steps to diagnosis ? What would be the next thing to check ?

Good news is cleaning the IACV has stopped the intermittent stalling !!

Need to do some miles in her from Thurs next week and at the moment I dont trust it to the bottom of the road!!

??????

Check for air leaks

Back to top

TC Holder Maxscan GS500 OBDII code reader/EML resetter available..

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DeRangeRC

Newbie

Offline

Taking it on one job at
a time.

Posts: 16
The Peak District (mostly)
Gender: male

Drives: 1999 Omega GLS 2.0 Auto

Re: Erratic Tickover - Hunting.
Reply #3 - 22. Jul 2011 at 11:11

Shelby wrote on 22. Jul 2011 at 10:27:

Did you do right down to and including the breather jet (not just breather hoses)?

I had exactly the same problem on mine and after doing all the breather hoses and jet it made a world of difference. Never stalled again and idles solidly at around 6-700 rpm.

Yeh, cleaned out IACV and the breather jet at the base of the carb.....was solid with gunk !! ??

Back to top

If its rusty cut it out.
If its dry, oil it.
If its dull, shine it.
If its stuck.......smack it with a hammer of course !!

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DeRangeRC

Newbie

Offline

Taking it on one job at
a time.

Posts: 16
The Peak District (mostly)
Gender: male

Drives: 1999 Omega GLS 2.0 Auto

Re: Erratic Tickover - Hunting.
Reply #4 - 22. Jul 2011 at 11:13

RobG wrote on 22. Jul 2011 at 10:39:

DeRangeRC wrote on 22. Jul 2011 at 10:19:

Sorry if this has been covered before in here but work means I only get a few minutes to look !! Roll Eyes

After cleaning out the IACV and all relevant breathers last night (found a very good guide on here) I took her for a test run up to temp and when I pulled up on the drive the tickover fluctuates and hunts between 1000rpm & 2000 ish rpm Embarrassed

What are the steps to diagnosis ? What would be the next thing to check ?

Good news is cleaning the IACV has stopped the intermittent stalling !!

Need to do some miles in her from Thurs next week and at the moment I dont trust it to the bottom of the road!!

??????

Check for air leaks

You mean on the breather hoses ?

Back to top

If its rusty cut it out.
If its dry, oil it.
If its dull, shine it.
If its stuck.......smack it with a hammer of course !!

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Shelby

Intermediate Member

Offline

Posts: 277
Sleaford, Lincolnshire
Gender: male

Drives: Mini facelift, 1999 2.0l CDX

Re: Erratic Tickover - Hunting.
Reply #5 - 22. Jul 2011 at 11:23

I would check all the main trunking is intact and connected securely. Check the breather hoses are connected securely and have no splits, cracks etc.

Did you put a new IACV gasket on it (and throttle body gasket if you took that off) or put the old ones back on?

I am not expert Tongue

just comparing to what I did with mine. I have a split in my intake trunking on the throttle body, have had to patch it up with a ton of insulting tape at the moment until I can get it replaced.

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Entwood

Omega King

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Quietly Confident

Posts: 13708
North Wiltshire
Gender: male

Drives: 3.2 Elite (with LPG)

Re: Erratic Tickover - Hunting.
Reply #6 - 22. Jul 2011 at 11:24

DeRangeRC wrote on 22. Jul 2011 at 11:13:

RobG wrote on 22. Jul 2011 at 10:39:

DeRangeRC wrote on 22. Jul 2011 at 10:19:

Sorry if this has been covered before in here but work means I only get a few minutes to look !! Roll Eyes

After cleaning out the IACV and all relevant breathers last night (found a very good guide on here) I took her for a test run up to temp and when I pulled up on the drive the tickover fluctuates and hunts between 1000rpm & 2000 ish rpm Embarrassed

What are the steps to diagnosis ? What would be the next thing to check ?

Good news is cleaning the IACV has stopped the intermittent stalling !!

Need to do some miles in her from Thurs next week and at the moment I dont trust it to the bottom of the road!!

??????

Check for air leaks

You mean on the breather hoses ?

Everywhere !!!

Spray around lightly with carb cleaner whilst the engine is running, especialy vac lines and plenum... if/when the engine note suddenly changes thats the air leak .. the carb cleaner has been sucked in as unmetered fuel and the engine note changes.

Fix leak, wipe with paper towel .. result ... engine runs properly and is nice and clean to boot ..

Back to top

« Last Edit: 22. Jul 2011 at 11:25 by Entwood »

V6 Cam locking/setting kit, Maxscan GS500 OBDII code reader/EML resetter available. Click for some Pictures

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DeRangeRC

Newbie

Offline

Taking it on one job at
a time.

Posts: 16
The Peak District (mostly)
Gender: male

Drives: 1999 Omega GLS 2.0 Auto

Re: Erratic Tickover - Hunting.
Reply #7 - 22. Jul 2011 at 11:30

Shelby wrote on 22. Jul 2011 at 11:23:

I would check all the main trunking is intact and connected securely. Check the breather hoses are connected securely and have no splits, cracks etc.

Did you put a new IACV gasket on it (and throttle body gasket if you took that off) or put the old ones back on?

I am not expert Tongue

just comparing to what I did with mine. I have a split in my intake trunking on the throttle body, have had to patch it up with a ton of insulting tape at the moment until I can get it replaced.

Yeh new IACV gasket, didnt have the throttle body off. ?? Will be checking the Air intake now though...."where is me tape"

Back to top

If its rusty cut it out.
If its dry, oil it.
If its dull, shine it.
If its stuck.......smack it with a hammer of course !!

IP Logged

DeRangeRC

Newbie

Offline

Taking it on one job at
a time.

Posts: 16
The Peak District (mostly)
Gender: male

Drives: 1999 Omega GLS 2.0 Auto

Re: Erratic Tickover - Hunting.
Reply #8 - 22. Jul 2011 at 11:33

Entwood wrote on 22. Jul 2011 at 11:24:

DeRangeRC wrote on 22. Jul 2011 at 11:13:

RobG wrote on 22. Jul 2011 at 10:39:

DeRangeRC wrote on 22. Jul 2011 at 10:19:

Sorry if this has been covered before in here but work means I only get a few minutes to look !! Roll Eyes

After cleaning out the IACV and all relevant breathers last night (found a very good guide on here) I took her for a test run up to temp and when I pulled up on the drive the tickover fluctuates and hunts between 1000rpm & 2000 ish rpm Embarrassed

What are the steps to diagnosis ? What would be the next thing to check ?

Good news is cleaning the IACV has stopped the intermittent stalling !!

Need to do some miles in her from Thurs next week and at the moment I dont trust it to the bottom of the road!!

??????

Check for air leaks

You mean on the breather hoses ?

Everywhere !!!

Spray around lightly with carb cleaner whilst the engine is running, especialy vac lines and plenum... if/when the engine note suddenly changes thats the air leak .. the carb cleaner has been sucked in as unmetered fuel and the engine note changes.

Fix leak, wipe with paper towel .. result ... engine runs properly and is nice and clean to boot ..

Cheers Entwood, Will try all that later...... and if this doesnt work what would be next ? Need to know worst case Sad

Cam cover gasket ? Undecided

Back to top

If its rusty cut it out.
If its dry, oil it.
If its dull, shine it.
If its stuck.......smack it with a hammer of course !!

IP Logged

Entwood

Omega King

Offline

Quietly Confident

Posts: 13708
North Wiltshire
Gender: male

Drives: 3.2 Elite (with LPG)

Re: Erratic Tickover - Hunting.
Reply #9 - 22. Jul 2011 at 12:18

DeRangeRC wrote on 22. Jul 2011 at 11:33:

Entwood wrote on 22. Jul 2011 at 11:24:

DeRangeRC wrote on 22. Jul 2011 at 11:13:

RobG wrote on 22. Jul 2011 at 10:39:

DeRangeRC wrote on 22. Jul 2011 at 10:19:

Sorry if this has been covered before in here but work means I only get a few minutes to look !! Roll Eyes

After cleaning out the IACV and all relevant breathers last night (found a very good guide on here) I took her for a test run up to temp and when I pulled up on the drive the tickover fluctuates and hunts between 1000rpm & 2000 ish rpm Embarrassed

What are the steps to diagnosis ? What would be the next thing to check ?

Good news is cleaning the IACV has stopped the intermittent stalling !!

Need to do some miles in her from Thurs next week and at the moment I dont trust it to the bottom of the road!!

??????

Check for air leaks

You mean on the breather hoses ?

Everywhere !!!

Spray around lightly with carb cleaner whilst the engine is running, especialy vac lines and plenum... if/when the engine note suddenly changes thats the air leak .. the carb cleaner has been sucked in as unmetered fuel and the engine note changes.

Fix leak, wipe with paper towel .. result ... engine runs properly and is nice and clean to boot ..

Cheers Entwood, Will try all that later...... and if this doesnt work what would be next ? Need to know worst case Sad

Cam cover gasket ? Undecided

Not a chance .. that will give you an oil leak outwards .not an airleak inwards.

You have disturbed a pipe/seal somewhere that is giving you an airleak. THAT is what causes hunting/erratic idling .. nowt else ..

Back to top

V6 Cam locking/setting kit, Maxscan GS500 OBDII code reader/EML resetter available. Click for some Pictures

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DeRangeRC

Newbie

Offline

Taking it on one job at
a time.

Posts: 16
The Peak District (mostly)
Gender: male

Drives: 1999 Omega GLS 2.0 Auto

Re: Erratic Tickover - Hunting.
Reply #10 - 22. Jul 2011 at 13:09

Entwood wrote on 22. Jul 2011 at 12:18:

DeRangeRC wrote on 22. Jul 2011 at 11:33:

Entwood wrote on 22. Jul 2011 at 11:24:

DeRangeRC wrote on 22. Jul 2011 at 11:13:

RobG wrote on 22. Jul 2011 at 10:39:

DeRangeRC wrote on 22. Jul 2011 at 10:19:

Sorry if this has been covered before in here but work means I only get a few minutes to look !! Roll Eyes

After cleaning out the IACV and all relevant breathers last night (found a very good guide on here) I took her for a test run up to temp and when I pulled up on the drive the tickover fluctuates and hunts between 1000rpm & 2000 ish rpm Embarrassed

What are the steps to diagnosis ? What would be the next thing to check ?

Good news is cleaning the IACV has stopped the intermittent stalling !!

Need to do some miles in her from Thurs next week and at the moment I dont trust it to the bottom of the road!!

??????

Check for air leaks

You mean on the breather hoses ?

Everywhere !!!

Spray around lightly with carb cleaner whilst the engine is running, especialy vac lines and plenum... if/when the engine note suddenly changes thats the air leak .. the carb cleaner has been sucked in as unmetered fuel and the engine note changes.

Fix leak, wipe with paper towel .. result ... engine runs properly and is nice and clean to boot ..

Cheers Entwood, Will try all that later...... and if this doesnt work what would be next ? Need to know worst case Sad

Cam cover gasket ? Undecided

Not a chance .. that will give you an oil leak outwards .not an airleak inwards.

You have disturbed a pipe/seal somewhere that is giving you an airleak. THAT is what causes hunting/erratic idling .. nowt else ..

Phew.... thats good news !!

Will pop out with my carb cleaner and paper towel this evening and find that leak.

OOF rules Cool

Back to top

If its rusty cut it out.
If its dry, oil it.
If its dull, shine it.
If its stuck.......smack it with a hammer of course !!

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