PDA

View Full Version : Idle Problem


Northerner
25-04-2008, 13:42
Looks like the Clio that I've just bought is suffering from an idle problem when warm.

When slowing down for junctions/traffic, the engine sometimes stalls. But this only happens when the car is fully warmed up.

I've cleaned the iscv and throttle body and the problem still persists.

Any ideas?
Northerner
25-04-2008, 13:45
Doh - Its a Clio Williams
Northerner
25-04-2008, 22:38
Anyone?
rob-legend
25-04-2008, 23:38
off topic, but whereabouts u from matey?
Tommo
26-04-2008, 00:43
Do a search mate, this has been discussed many times and could be a number of things so best to try them all until the problem is rectified. A new cat seemed to sort my idle issues a few years ago
Bayliss
26-04-2008, 01:20
off topic, but whereabouts u from matey?

don't let Rob touch it mate it'll never work again, lol

could be a broken gasket or a split pipe going into the inlet manifold from the rocker or just a bad fitment on a pipe but if u ask me sounds like an earth fault
Northerner
26-04-2008, 10:12
off topic, but whereabouts u from matey?

Doncaster
rob-legend
26-04-2008, 11:26
off topic, but whereabouts u from matey?

don't let Rob touch it mate it'll never work again, lol

could be a broken gasket or a split pipe going into the inlet manifold from the rocker or just a bad fitment on a pipe but if u ask me sounds like an earth fault


cheeky sod, i was just asking where the guy lived (with the name northerner, i thought he might live near us) gheyboy.
BRUN
26-04-2008, 11:42
could be coolant temp sensor giving wrong reading when hot, but unlikely

how does the car run when hot apart from the idle issue
Northerner
26-04-2008, 13:59
could be coolant temp sensor giving wrong reading when hot, but unlikely

how does the car run when hot apart from the idle issue

The car runs fine, apart from the idle issue.

It appears more prevalent when i'm slowing down from speed...
mikeymikewakey
26-04-2008, 14:17
LAMBDA SENSOR
Northerner
26-04-2008, 14:27
LAMBDA SENSOR

Wouldnt the Lambda sensor affect the idle during cold starts/running?
mikeymikewakey
26-04-2008, 14:56
My experience of dealing with problem lambda sensors was always when the engine had got to temperature.

I never had any problems when it was cold.

The idle dips and dips to around 200-300 and eventually stalls.
BRUN
26-04-2008, 15:24
my lambda problems were the opposite, only cold running problems
Northerner
26-04-2008, 17:21
How much does a new Lambda sensor cost and where do you get one from?
BRUN
26-04-2008, 22:37
about £50 from a factors, get a direct fit one, NOT a universal one

my preference is for an NGK one over a Bosch, they last longer
Northerner
08-05-2008, 19:14
Have changed the Lambda sensor and no change.

Any ideas?
MAXIBOY
08-05-2008, 19:21
does it only do it when warm...
Northerner
08-05-2008, 20:01
Yeah, only when its fully warmed up.
MAXIBOY
08-05-2008, 20:04
could try a coolant temp sensor as suggested above..

have you looked for air leaks..
Northerner
08-05-2008, 20:20
could try a coolant temp sensor as suggested above..

have you looked for air leaks..

Yeah, all the pipework, etc looks in good order.

I'll try a coolant sensor next...
teabag
08-05-2008, 20:23
looks more likely to be the coolant temp sensor then

if its nakered it keeps the ecu on the cold running map so it runs richer
drsmith1979
08-05-2008, 22:51
coolant temp sensor doesn't sound like the culprit here, but its worth a try... i would get the isvc off again and give that a clean, my experience with coolant temp sensor is opposite, it gives shite idle when cold as it can't detect the temp.. then clears up when warm as the lambda will kick in and take over the fueling etc...

So for me it could be the iscv, tps (throttle position sensor) or maybe as suggested a dodgey lambda heating coil. i think its the iscv is either knackered or sticking.
Northerner
09-05-2008, 00:56
I doubt its the Lambda as I have replaced this with a new one.

TPS - If this was faulty, wouldn't it create issues independant of the engine temp?

ISCV - I've cleaned this but the problem remains. Is there a way to test it? Also, how much does a new one cost?
Northerner
11-05-2008, 08:48
Also, would any fault codes be captured by the ecu?
MAXIBOY
11-05-2008, 09:29
not sure mate...think they used to use an rx25 but not sure what it was capable of
drsmith1979
11-05-2008, 23:49
i guess you could borrow one from a friend or buy one from a scrappy? not sure on new price, but i don't think they are cheap
Northerner
14-05-2008, 08:09
Its booked into a Renault specialists tomorrow to be hooked up to the Renault diagnostic machine.

I'll post up the outcome...
Northerner
09-06-2008, 21:31
Sorry for the delay in posting an update, but I've been fixing my track prepped R5GTTand subjected to repeated decorating jobs set by the wife.

Anyway, the diagnostic check didn't pick up anything and I was duly advised to change the ISCV which hasn't made any difference.

When the car is fully warmed up and the issue becomes prevalent, the throttle becomes like a switch and is unable to be initially modulated.

I'm starting to think that the TPS may be the culprit - Any ideas?

Also, how much would a new TPS cost?
Wobba
09-06-2008, 22:09
Looks like the Clio that I've just bought is suffering from an idle problem when warm.

When slowing down for junctions/traffic, the engine sometimes stalls. But this only happens when the car is fully warmed up.

I've cleaned the iscv and throttle body and the problem still persists.

Any ideas?

Brake master cylinder thingy? Leaking vaccum possibly...