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Stalling under 1000 rpm when engine is warm

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daz318ti

New Member
Hi,

This is my 1st post, so I will try and keep it short and sweet.

The Vee is cutting out at traffic lights or when slowing down to under 1000rpm. This happens normally after about 10 mins of driving, and the engine temp gauge is reading at halfway. Idle is erratic and to keep her running you are having to keep your foot on the gas. However after doing this, and driving a little further, you can slow down to 1000 rpm or under, and it will then not do it!
I know this sounds like a coil problem, but having replaced all 6 in the last 6 months, as well as changing the plugs, I am hoping this will not be the problem :( !

If anyone has had any advise on this, or has had this problem themselves please can you advise!!!

cheers
 
Hmmm ... not a problem I recall others having reported. How consistent is the problem? Every time you drive it or only sometimes? Once it's righted itself how long is it fine for?

Assume no lights are staying on?
 
Unfortuantly its quite common, this week it has done it twice in 2 days, normally on the way home from work.
No lights stay on, and I have plugged an OBDII reader in to see if any fault codes exist... - Nothing listed.
I am wondering if the engine temp sensor is faulty, and making the ECU overfuel, thus causing the engine to flood, but then again, when you re-start, if fires up 1st time with no problems, only a faint smell of fuel.
Having scoured the forum, no one else seems to have this problem :s
 
Hmmm, this sounds typical of fuel injections symptoms associated with air leaks or the idle control valve/operation ... Another thought could be fuel pressure sensor.

I wouldn't think a faulty temp sensor would cause overfuelling to the extent of impacting idle as you describe. I am not sure if all sensors register fault codes but the main ones certainly should.

I may be able to do some digging later but don't restrict yourself to this forum, try doing some google searching generally around Electronic Fuel Injection and idling issues. The V6 system is Bosch ME-Motronic.

Martin
 
Ok martin,

Thanks for the info, I will have a look round and see what info I can find! :approve:

Cheers

Darrell
 
Having had a good scout on the internet, I have not come up with anything :(
I am reluctant to go to the local main dealer, as from past experience they are rubbish.
Any ideas on anyone local to Woking/Guildford area whom may be able to look into this problem?
 
Hi

I am from Haslemere and normally use the Subaru garage 'Proven' across the road from our fire station. They fixed my V6 recently and done a stirling job. The boys over there are the nuts and very professional. They are used to working on high performance jap cars and even considered my V6 basic and agricultural...so there shouldnt have any probs in diagnosing your prob?

Just an idea?
 
I know where they are! I live in Beacon hill so its not far away!
Might well pop in and have a word with them.
Cheers for the recommendation! :approve:
 
Pop in there Tues and speak to Graham the manager. He knows me and my car.

Its worth a try as its not far away.

Hopefully gonna get my car in there next week for an MOT. Thing is there main electric intake failed last w/e and fried all the equipment and they hope its all gonna get fixed by Tues.

All the best
 
You could try Martins at winchester, i know they are a main dealer [smilie=bunny_4.gif] but they have a Renaultsport technician and quoted me £850 incl vat and bits for a cam change, so they are quite resonable on pricing.

But as already said Proven have a good reputation, and are nearer, good luck and let us know how you get on. [smilie=icon_exclaim.gif]
 
Mine has done this twice now, in very hot weather with aircon on :(

Did you ever find the problem? I have changed the fuel return valve so fingers crossed.
 
I noticed something similiar today, setting back off from either a crawl or standstill. The car stalled twice. Not sure if its idling correctly? It went through a 4 year service on friday [smilie=doubt.gif] wonder if reno tinkered with it
 
Maybe its just the very high temps in the engine bay doing something to the fuel?? mine has been soooo hot today (coolant temp is ok but ambient temp is rediculous)

When I park it in shade it starts and runs fine, leave it in the sun for a while ans starts to play up.
 
I run my car in stop start traffic with 35c heat in Hong Kong but it doesnt stall so its not normal

I have found since my major makeover / engine out that with the aircon the revs are not steady at idle / fluctuate a bit but thats all

Maybe its the fuel vent around the tank which I think is different from the fuel return valve - check with Clarkiev6 he told me this could be a problem before and they can go
 
Is the air con on or off when it does this? Have you noticed your fuel consumption increasing recently? Is the car running hotter than "normal"?
 
Hi, as an update to the problem I had.

I have not really had the problem since putting up the original post! Typical when you are trying to find a fault [smilie=icon_cry.gif]

I`m damned sure its not the coils, as it does not missfire. Heat could be a contributing factor, but mine did it after only a few miles of low speed driving, usually stalling when at idle or just above, maybe after it had just come off autochoke?

The problem never occured with the a/c on, but i believe that when the a/c is on on this will raise the engine rpm.

At the moment it is still a bit of a mystery, as really cannot diagnose without the problem occuring all the time! :(
 
Just a quick update.

I have removed the throttle body, which was coked up really badly, cleaned thoroughly with carb cleaner, and replaced.
What a difference!! She runs a1 again, with no stalling or loss of power :)

Apparently, if coked up, the throttle butterfly will not work efficiently and will cause running problems, so cleaning up seems to have solved the problem.
 
We checked the plugs. They are ok. Only changed them about 4k ago, and are still clean- thank goodness, didn`t fancy shelling out for another set!
 
Ah yes I'd forgot to mention that earlier. Had the same problem with mine, Piper X filter was clogged and so was the throttle body. Cleaned them up and was all good again.

Alot of people have aftermarket filters BMC / Piper but dont realise you have to clean and oil them annually or else you'll get these problems.

Check my post on this / other tips from before

viewtopic.php?f=13&t=8555&p=73065
 
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