uneven running

[Christhurlow61]

my chimaera suddenly started running rough it does/nt sound like its running on all cylinders what could it be(plugs leads etc) what plugs would be good for 93 4.0 chimaera

[Bassfiend]

My first check would be that the extenders are still firmly attached to the plugs - I find they tend to come lose quite easily!

Phil

[Christhurlow61]

thanks i,ll try that

[chris1972]

My Chim was doing the same.

I started by changing the dizzy cap and rotor arm as they looked worn and were cheap to do. This made is slight improvement, but not much. I then changed the old HT leads with a 8mm Magnecore set and replaced the worn extenders with a second hand set in better condition. It ticks over beautifully now, even when cold.

What condition are the leads, plugs and extenders in?

[Twistygit]

mine also was a bit rough and was going to replace the leads, with expensive magncore but off a thread on here a few months ago I bought some standard lucas ones for about 20 english pounds and it ran like a dream. even though I had a receipt from a previous owner had replaced them 18 months earlier.

[blitzracing]

If you are going down the Magnecore route Id suggest you go for the black ones as these have better spike control than the blue and red types- (Im sure these are pushed as the profit margins are so high for the dealers) and you dont gain anything by fitting "race leads" apart from a much lighter wallet. I like the stock Bosch leads myself.

[chris1972]

To be fair, I got a very good deal on my Magnecores and extenders; however, I would have gone for a stock set or something similar:

http://www.clever-trevor.net/TVR/Parts_details/E02...

http://www.clever-trevor.net/TVR/Parts_details/035...

[Barkychoc]

It's a bh to get to the two under the plenum but just pop the injector connectors off one at a time to see if you have a cylinder down.
Push the wire clip and they lift off easily.
If you pop one off and there is no difference you found it.

[chris1972]

Barkychoc said:

It's a bh to get to the two under the plenum but just pop the injector connectors off one at a time to see if you have a cylinder down.
Push the wire clip and they lift off easily.
If you pop one off and there is no difference you found it.