mifire/backfire at 4000rpm ..ish

[G20RG B]

Looking for some help guys,

I recently changed the fuel rail on my Cerbera, I went out for a quick spin and got a misfire around 3500-4500 rpm, came back and checked engine and noticed that one of the O rings had been damaged on the injector when re-fitting the fuel rail and fuel was leaking from it. I removed the fuel rail and fitted new O rings to the injectors, went for a spin this morning and thought everything was ok, but after being sat in traffic for a few minutes when I tried to give it some throttle at 3500-4000 rpm it backfired and misfired again. There is no leak from the fuel rail and all the HT leads are well connected at the head and the coil pack.
The car drives fine up to 3500 then the MIL light flashes and misfires/backfires. I'll change the HT leads first in case one has got damaged as I also removed the Cam Cover for powder coating recently.
Is it worth buying the magnacours HT leads there about double the price of the normal ones?.

Then I guess I'll do the coil pack then plugs but they only have 3k miles on them since changed at the last service.

Any ideas guys?!!

Edited to say, checked all manifold with a plastic tie-wrap and they are all up to temperature.

Edited by G20RG B on Saturday 26th February 14:18

[G20RG B]

Just in case anyone else has the same issue one day, A new set of HT leads cured the misfire and the car is going fantastic!!

[PetrolHeadPete]

Thats good news and thanks for sharing

[nrick]

Which leads did you go for, I have the same dilemma

Std - 49.99
Magnecore blue - £75
Magnecore red - £121

Any views?

[Targarama]

nrick said:

Which leads did you go for, I have the same dilemma

Std - 49.99
Magnecore blue - £75
Magnecore red - £121

Any views?

If it helps, Magnecor didn't last as long as factory originals on my car.

[G20RG B]

I went for the standard ones at £49.99. The current ones have lasted since 2003 and 30k miles so that's good enough for me..

[nrick]

Thanks, that'll be a standard set then.