New owner - running question

[bullshit]

Hello Everybody

I've just bought a Chimaera (1996 4.0) and I am delighted with it. I have been reading the forum for some weeks now and it has been a great help in the buying experience.
Just one issue though: The car seems to hold back on medium to hard acceleration - worse when cold but still does it when the engine is warm. Once above 3,000 rpm it seems to clear and performs as it should.
I have ordered the bible, but in the mean time any ideas ??

Many thanks

[shnozz]

well I'll say it first - try cleaning the stepper motor. Seems to always cure any rough running on mine.

[M@H]

shnozz said:

well I'll say it first - try cleaning the stepper motor. Seems to always cure any rough running on mine.

exactly what I was going to suggest..

[bullshit]

Thanks Shnozz

I'll do that. Although I'm mechanically minded, I havn't got a clue what the stepper motor is/where it is/or what it does - I hope the bible will enlighten.

By the way, appologies for the author name - it was the first thing that entered my mind when asked by the computer - can't seem to change it now though......

[beano500]

I'm thinking HT leads and plugs....

But then I've recently replaced mine and that made a difference to similar poor running.




(Oh and I'm keeping off the "Ultimate" in favour of "Optimax" too......

which leads me to wonder about dirty fuel?)

[beano500]

bullshit said:

By the way, appologies for the author name - it was the first thing that entered my mind when asked by the computer - can't seem to change it now though......

Go into your profile - I'm sure it's quite easy to change (and confuse everybody). You might try out Ted's limit on rude names....

[cosmoschick]

shnozz said:

well I'll say it first - try cleaning the stepper motor. Seems to always cure any rough running on mine.

Wow! What a rapid response, Phil. I reckon you have some sort of 'stepper motor' alert system in place...

The first time my Chim's stepper motor was cleaned it didn't make any difference to Trev's rough performance. However, the second time it seemed to make a real difference but unfortunately he's slowly gone back to his old ways...'kangarooing' at low speeds

He really does need servicing

[Marcos Maniac]

cosmoschick said:

He really does need servicing

Pick up the phone Ros - Austec are local to you

Lock after Trev or he won't look after you

[chimhunter]

I wouldn't accelerate hard when the engine is cold. Not so good for the longevity of the engine. Let it warm up for a few minutesbefore tanking it properly. Unless you live near a whole buch of people and your car has no silencing. In which case drive it slowly for the first few miles.

Rob

>> Edited by chimhunter on Tuesday 4th May 17:44

[shnozz]

chimhunter said:

Unless you live near a whole buch of people and your car has no silencing. In which case drive it slowly for the first few miles.

with no baffles my neighbours dont speak to me.

[timewind]

To me this sounds like ECU coolant temp sensor (Part No. SNB802). Around £ 20. Easy to fit if you do not have PAS or AC.

Did that on mine lately and now runs smooth like new.

Timewind