Misfire in high gear 1750/2000rpm...

phoenixcsl · 03-06-2014, 06:16 PM

After 4 months of being without Cecil, he finally came home on Saturday...

Had my Schrick Cams fitted and a few other bits done such as a service, and had the front end re-sprayed from stone chips and the wheel arches, looks amazing.

So, when talking to ML they noticed a misfire approx 1750/2000 rpm, on the test drive it was hard to reproduce, so I took the car, said i'll run around in it for a few days and if it comes back will bring it back to get sorted.

Figured out that if the car is at the rev range and say i'm in 6th (normally i'd be in say 3rd so wouldn't notice), and then you go to WOT, there is a noticeable misfire, annoyingly, drop the gears and all is fine, no EML or warning lights, though the misfire is recorded on Cylinder 3 in the fault code.

They have fitted a new coil pack to the car, and new plugs, but neither have cured it, the coil packs are all Bosch ones which I replaced the lot last year, but they fitted a brand new Bosch one in just in-case.

What's the next point of call? Injectors? Do these go on CSL's?

Or Vanos solenoid? Though i'm running a Bessian Systems one which I changed last summer.

Any ideas?

03-06-2014, 06:16 PM	#1
phoenixcsl S5, Sport Off, DSC M-track Join Date: Aug 2009 Location: Surrey Posts: 634 Casino cash: $4900	Misfire in high gear 1750/2000rpm... After 4 months of being without Cecil, he finally came home on Saturday... Had my Schrick Cams fitted and a few other bits done such as a service, and had the front end re-sprayed from stone chips and the wheel arches, looks amazing. So, when talking to ML they noticed a misfire approx 1750/2000 rpm, on the test drive it was hard to reproduce, so I took the car, said i'll run around in it for a few days and if it comes back will bring it back to get sorted. Figured out that if the car is at the rev range and say i'm in 6th (normally i'd be in say 3rd so wouldn't notice), and then you go to WOT, there is a noticeable misfire, annoyingly, drop the gears and all is fine, no EML or warning lights, though the misfire is recorded on Cylinder 3 in the fault code. They have fitted a new coil pack to the car, and new plugs, but neither have cured it, the coil packs are all Bosch ones which I replaced the lot last year, but they fitted a brand new Bosch one in just in-case. What's the next point of call? Injectors? Do these go on CSL's? Or Vanos solenoid? Though i'm running a Bessian Systems one which I changed last summer. Any ideas?