engine missfire on idle, cambelt picture request.

[04kendalld]

Hi everyone.

Ive started getting a misfire on idle, goes away with slight hessitation under load.

Ive tried many parts which usually cause missfire (spark, inlet, injectors, tdc sensor, air leaks, o2 sensors ) so think the timing maybe out.

My request is...

one your opinions one the issue?

two could someone that has had the engine out and taken a picture of the cambelt on and timed ready to go back in upload the picture so I can check the markings against mine?

Many thanks

 

[W M Autos]

your timing won't just change.. It's probably the coil pack or the ignition leads.

 

[Dan@SJM]

Hi everyone.

Ive started getting a misfire on idle, goes away with slight hessitation under load.

Ive tried many parts which usually cause missfire (spark, inlet, injectors, tdc sensor, air leaks, o2 sensors ) so think the timing maybe out.

My request is...

one your opinions one the issue?

two could someone that has had the engine out and taken a picture of the cambelt on and timed ready to go back in upload the picture so I can check the markings against mine?

Many thanks

You won't be able to tell visually.

 

[Dan@SJM]

your timing won't just change.. It's probably the coil pack or the ignition leads.

You mean to say that cambelt timing hasn't slipped in the past? I've seen it on cars with the cambelt done poorly.

 

[W M Autos]

I'm not saying it's not possible but I would find it more likely to be an ignition issue as he says it clears. I would expect it to be an ignition lead breaking down before cambelt. Don't understand why everyone is so quick to assume cambelt when the car was working fine before. I would only suspect the belt assembly if it's been changed recently.

You mean to say that cambelt timing hasn't slipped in the past? I've seen it on cars with the cambelt done poorly.

 

[04kendalld]

I've checked the plugs and give a good spark, if it was it was the leads or coil pack surely it wouldn't spark properly.

I wanted to know what cam marks to look for st tdc

 

[W M Autos]

Timing belt is set and checked with locking tools. Seriously try a set of leads I've seen plenty in my time that have given the exact problem you're having. Arcing in the plug bore or generally not working properly at low revs.

 

[04kendalld]

Ok mate ill give them a try tomorrow, my girlfriend has a 1.4 would they work for testing or do I need them for the 2.0?

 

[Dan@SJM]

The locking pin is different on the 2.0

 

[lemonnobby]

You need another 172/182 to swap the leads and coil pack.

 

[Dan@SJM]

As above really. Also what spark plugs is it running?

 

[04kendalld]

Not sure they were ones that renault supplied but we're only about 5 months old.. I've got a tdc pin for the 2.0.

When the car at what marking should I look for on the pullys?

 

[Dan@SJM]

There is no marking on the pulleys. The tool locks the cams.

 

[04kendalld]

I noticed on the dephaser pully there was a marker on it, when at tdc should the mark be pointing in a certain position?

 

[Dan@SJM]

Ffs. No. There is NO MARKS.

 

[105e]

Checking timing is whole lotta agro, explore every other avenue first.