Odd one today

[73CSL]

Had an odd one today ....accelerating hard to overtake, I Accidentally hit the Rev limiter in 3rd , changed into 4 th and the engine warning light came on and car was misfiring ( felt like the limiter) . Coasted along on a light throttle at 70 for about a mile misfiring all the way ( was on the motorway so couldn't immediately pull over) and up the slip road. Slowed to a near stop, changing down through the gears ..... Then light went out and misfire gone .

Car then fine for the rest of my 15 mile journey incl some full throttle pulls all the way through the Rev range.

any ideas ? Rev limiter stuck on ( is that possible ) , coil pack threw a wobbly ?

[Neil M]

Sounds like one or more of the coils is on its way out. Have they ever been changed.

[73CSL]

not sure if the coil packs have been changed .. car clicked over 67K miles yesterday ( I bought it at 59K ).

Trying to understand why the rev limiter reining back the ignition would cause a coil pack to temp fail ?

Will a diagnostic show what happened and to which coil pack ?


£21 for a coil pack good ?

http://www.eurocarparts.com/ecp/c/BM...6cfef9b&000197

[giraffe]

Originally Posted by 73CSL

not sure if the coil packs have been changed .. car clicked over 67K miles yesterday ( I bought it at 59K ).

Trying to understand why the rev limiter reining back the ignition would cause a coil pack to temp fail ?

Will a diagnostic show what happened and to which coil pack ?


£21 for a coil pack good ?

http://www.eurocarparts.com/ecp/c/BM...6cfef9b&000197

Diagnosis will show faults stored in DME could well be coil starting to break down under the heat and load of full throttle .

[73CSL]

thanks Gareth

Not quite sure what a single coil misfiring would feel like, but in this instance when you tried to accelerate it wouldn't , felt like all the ignition was being held back

I'll swap over all the coils and see

Are the bosch coils in the link I posted the correct ones ?

[giraffe]

Originally Posted by 73CSL

thanks Gareth

Not quite sure what a single coil misfiring would feel like, but in this instance when you tried to accelerate it wouldn't , felt like all the ignition was being held back

I'll swap over all the coils and see

Are the bosch coils in the link I posted the correct ones ?

Yes mate

[Neil M]

Give Martin at MS Motorsport a shout first, see if he can match the price
Coils are: Bosch Part No. 0 221 504 464 and don't forget the plugs: NGK Part No. DCPR8EIX while you're at it!

[billyboysm3]

Originally Posted by 73CSL

thanks Gareth

Not quite sure what a single coil misfiring would feel like, but in this instance when you tried to accelerate it wouldn't , felt like all the ignition was being held back

I'll swap over all the coils and see

Are the bosch coils in the link I posted the correct ones ?

Yeah, Euro also do those spark plugs but not online.

[73CSL]

spark plugs were done at the inspection 2 , 6000 miles ago, by gareth when he was @ elms

Neil, I'd already ordered the coil packs from euro ( went through cashback.com & got another 5% off ) before I saw your post .

Out of interest, would coil packs be covered by the warranty ? ( not relevant for me as I have a £250 excess )

[Neil M]

Originally Posted by 73CSL

Out of interest, would coil packs be covered by the warranty ? (not relevant for me as I have a £250 excess )

No, They are a service item, fair wear and tear is the get out clause. just like tyres.