Judder and low rpm

[Oddesy]

Hi, I've had a persistent problem with my car, on a cold start, if I bring the revs up to 1800-2000rpm the engine judders quite badly and when I drive it holds back around those revs, but above and below those revs its fine. Once it's up to temperature, it's completely fine.

I've changed:
- Coil pack
- Leads
- Swapped the cat for a sports cat
- Lambda sensors
- Upper inlet gaskets
- Upper engine mout
- Dog bone mount

It's still doing it, I'm starting to think this is just something my car does

Any clue what could be causing it?

 

[bozothenutter]

how is fuel consumption?
because only when cold i'm still thinking lambda.

injectors
sparkplugs

don't just throw parts at it mate (good excuse to spruce it up a bit though...?)

 

[Oddesy]

Fuel consumption is fine, I can get 46mpg on the motorway

It's got new spark plugs as well, fo got to mention that, not changed the injectors.

Nah I've been swapping stuff gradually anyways, pretty much all that stuff needed replacing, a lot of it had been on the car for 16 years

 

[Landyman]

I had a similar problem and it turned out the cam timing was out, from last time the belts were changed.
But it did it all the time although worse when cold.

 

[Simon998]

Mine's exactly the same. I've only driven two 172's but both of them did it on cold start. The engine runs on a different map (or something) for 2 minutes after you start the engine. After that, it's smooth as.

If you remap it, or load the RStuner map it supposedly gets rid of the stutter.

 

[Oddesy]

Remap was my next thought

 

[Simon998]

If you do a search, all 1*2's do it when they're cold. It's a cold map and it limits the rpm to 5k or something. I thought it was broken at first but I've just learned to live with it.

(First link that came up on google - https://www.cliosport.net/threads/182-stuttering-from-cold.58946/ )

 

[Darren S]

You'll know if it's an injector - you get the EML occasionally staying on and your little Clio will sound like a Scooby - with about three-quarters less of the power.

And it stays that way regardless of engine temp.

 

[bloke]

You'll know if it's an injector - you get the EML occasionally staying on and your little Clio will sound like a Scooby - with about three-quarters less of the power.

And it stays that way regardless of engine temp.

They don't always throw an eml for an injector.

 

[Oddesy]

Never had an EML, I've lived with it for like a year and a half, just more curious to what it was more than anything, seems like its nothing to worry about though

 

[Landyman]

Mine doesn’t do it hot or cold now. But it is remapped.