New head lumpy ruff idle

[woodysjw]

Can anyone help?

Just had the head changed on my 2.5 due to it being cracked,
its all back together now and drives ok, but on idle it chugs and u can smell fuel real bad. it idles at the right speed just very lumpy but as soon as u give it some revs its fine.

[Brianmoooore]

If the ECU has been disconnected from the battery, then it will take 100miles to learn idle settings again.
If this isn't it, try getting it on a gas analyser and setting up the AFM bypass.

[Demlotcrew]

TPS? Also were the clearances on the rockers adjusted?

Andrew

[GDBN]

I would also check the valve clearances first.
Happened on mine.

G

[woodysjw]

Yes did valve clearences and also what is AFM bypass

[woodysjw]

also when driving if u back right off the throttle you can here it pop and its a bit lumpy at low speeds too.

[Chris-W]

And you're 100% that it's timed up right?

[woodysjw]

no idear i didnt do it

[kirils]

i'm pretty sure it's the timing. i have experienced the same problem... when it's idling rough and you stamp on the gas hard can you hear the valves knocking or something like that?

[woodysjw]

I didnt think u could alter the timing on an E30

[Chris-W]

You can get the timing belt on wrong!

[woodysjw]

would it run with the belt in the wrong place

[Chris-W]

I'm afraid so...and some of the symptoms you've described would suggest this.

If you're lucky, it'll just be a matter of timing it up.

[woodysjw]

right cleaned everything with 2 cans of carb cleaner, still no joy,
spoke to person who did the job and he said he set the rocker gap to 0.20 insted of 0.25
as it was warm when he did it.

[Chris-W]

Eh? Should be a greater clearance when the engine is warm, ie 0.3mm.

[woodysjw]

??? could this be the problem

[jonbuoy]

When cold: 0.25mm
When hot: 0.30mm


Hi mate, you got it done then
I've got the same thing with mine but it does'nt seem to effect it when i'm drifting

[woodysjw]

Hello mate long time no see. still drifting then mate. Mine is bugging the Shit out of me.

[Adammcf]

Valve clearances were what I was going to say as well.

[jonbuoy]

I need to do my valve clearance's, the 2.5 that i put in has had a new/reckon head and they need adjusting now so hopefully that will sort it out, same for you mate


You'll have to come out Saturday geese, your missing out!!

[woodysjw]

Will come down dude PM me ya number i will give you a bell.

[Dan318-is]

the backfire upon configues to me its running rich hence backfiring/burning excess fuel

a guy i sold an engine too had similar idlie problems and it turned out to be valve clearances that were way out. if the car was timed wrong surely it would run a lot worse than on idle and let off

start with simple, basic things first before considering drastic stuff

[woodysjw]

Nice one mate will check them in the morning

[woodysjw]

right adjusterd the tappets its a bit better sort of goes better anyway but still just lumpy at idle makes the whole car shake?????

[cliffybabe]

My timing belt was out on my e30 and it had some of these issue's listed, I got Stuartgallafant to do my belt and tensioner and it run so much better since, It feels like a different car and more responce

[Chris-W]

Might be something as simple as being one tooth out. Not hard to check.

[woodysjw]

out with the spanners again tomorrow