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[pops]

hi all...
wonder if any one can help me....

my n reg 3 ltr V6 elite auto, has an intermittant fault....

starts fine every time when cold, but at times after doing about 5 to 6 miles or just as the temp is getting up to about 90+ deg, she will cut out as i slow right down for a junction etc... mainley after the revs drop below 1 to 1.5k. from this point its hard to start and when it does start you have to hold the revs up above 1.5k to keep it going, normally no missfire etc apart from yesterday i could feel it slighty missing now and then...in the last 3 days its cut out 3 times on a 15 mile run but normally just goes away, it stopped once at a round about today then fine after...bloody strange if you ask me...

any ideas

tnx pops

[cfcdoc]

had the same on an old golf, it appeared it was the temp sensor that resulted in overfuelling and cutting out as the mix was too rich.

[Marks DTM Calib]

Can you flash out any fault codes (search on here to find out how to) as its is either crank sensor or a sticking idle valve I would say.

[Dazzler]

My moneies on the ICV.... Has your fuel consumption dropped?

[davlad22]

had the same on an old golf

An old golf is not the same as a 3.0 V6 Omega elite though!  

Just out of interest Mark, do you (or anyone else) happen to know the price on each of these parts? I know the ICV can be cleaned but seems like such a common problem and would be interesting to know how much for a proper replacements.

[Andy B]

Just out of interest Mark, do you (or anyone else) happen to know the price on each of these parts? I know the ICV can be cleaned but seems like such a common problem and would be interesting to know how much for a proper replacements.

A lot I would think. They were something lik £150 for a MkII Cavalier. Buy a can of carb cleaner

[Marks DTM Calib]

Unlike the 4 pots, the V6 idle valve is VERY robust and hence cleaning 99% of the time restores the unit to servicable condition.

The part new is £167+Vat Retail....

Yes, the old golfs were very basic injection setups much the same as the Mk1 Astra, V8 rovers etc.....basicaly Lucas L-Jet and hence not closed loop control. They got even worse when VAG tossed about and wrote there own Digifart operating system for the Bosch setups.

[davlad22]

Digifart!

£150 for a MKII cavalier!   That's twice the value of the car

[Martin_1962]

SOunds like how my crank sensor started to go

[pops]

tnx for the info guys...
trying the ICV first as its the easiest...cleaned it out with carb cleaner..a more positive return on the spring as much as you can tell....it was'nt caked but some carbon or simalar build up on the slide/port
run it up to hot this morning and running fine but not tryed it on the run...

cant find info of how to find the fault codes, so no input on that.....
mpg..seems much the same, 22/23mpg..as local lanes and driving around reading and basingstoke is not much of a help...it did drop a bit but that was me hitting the go peddle to clear it as has worked for a while in past, i would like to run it for a while a speed but want to keep my licence

so will let you know how it performs at a later date after testing it...

tnx mark..

[TheBoy]

tnx for the info guys...
trying the ICV first as its the easiest...cleaned it out with carb cleaner..a more positive return on the spring as much as you can tell....it was'nt caked but some carbon or simalar build up on the slide/port
run it up to hot this morning and running fine but not tryed it on the run...

cant find info of how to find the fault codes, so no input on that.....
mpg..seems much the same, 22/23mpg..as local lanes and driving around reading and basingstoke is not much of a help...it did drop a bit but that was me hitting the go peddle to clear it as has worked for a while in past, i would like to run it for a while a speed but want to keep my licence

so will let you know how it performs at a later date after testing it...

tnx mark..

Hopefully the cleaner ICV will resolve

Paperclip test, see http://www.omegaowners.com/forum/YaBB.pl?num=1152601768

[pops]

yep the carb cleaner in the ICV seems to have done the trick...
even the mpg has gone up, dam near getting 27 mpg

so tnx to all...

mark

[ians]

Another member in Berkshire. Welcome mate!

[pops]

just to let you know, it did not cure the problem in the long term. flashed out the codes and nothing. so just changed the crank sensor this morning (interesting little job, as it did not want to come out!.) took it for a short test drive of about 12 miles around local roads. reset the mpg to zero and it dropped into the 20's then came back into the 30's more than once!!!! never seen 30 mpg on local roads before. so its looking very positive at the minute.

so fingers crossed i might have fixed it at last.

cheers mark

[pops]

still playing up....
the bits i have changed have made it better but not 100% right...

missfires around 2.5k...cuts out and does not like starting when its hot or cold at times...get it to catch and wind the revs up to the limiter some times cures it or it will do this 3-4 times..then booting it will clear...

did it today and managed to get some fault codes in a strange order...
flashing 12 (ok) do that 2-3 times then (13 and then 5? if i picked the revs up to the problem area of 1-2.5k while missfiring/lumpy) again 2-3 times and ...deffinate gap between the 13 and the 5 though! as the revs went back to tick over back to 12 only... :-?

moved trapped wires on co2 sensor but not tested, as cleared again now!

so if any one wants a challenge or is bored you can work that one out for me

off drag racing this weekend with the van on tow....well thats if it makes it!...so look back in next week..

also mpg does seem to drop at times...but then i guess it would.

cheers mark...