k series running on 3 cylinders when hot?

[fergus]

I've got a DVA'd k series which after various sessions at the 'Ring this weekend, seemed as if it was running on 3 cylinders after it was started up following a period of hard use. When started from cold the symptom wasn't there.

Any ideas as to what this could be? Impending HGF? Plugs and HT leads OK. recently mapped at Emerald with a new K3 ECU.... Not done comp/leakdown test yet.

[rdodger]

Plug, HT lead, coil pack?

[fergus]

fergus said:

Plugs and HT leads OK.

[Steve_T]

A possible is that the coil pack/packs are starting to break down.

[rdodger]

rdodger said:

Plug, HT lead, coil pack?

Oh yeah, should have read that

Coilpack?

[fergus]

suppose I'd better let caterham relieve me of more cash then. Any thoughts on impending HGF or other internal worries?

I think a DVA refresh is on the cards, as the engine spends most of its life around 8k over the past 2 years......

the problem only manifests itself when the engine is either hot, or is started soon after a solid thrashing....

[MikeGF]

Stupid newbie question - What does DVA stand for?

Cheers
MikeGF

[fergus]

MikeGF said:

Stupid newbie question - What does DVA stand for?

Cheers
MikeGF

Dave Andrews - K series guru. Great engine tuner, and a very inteligent man, who I *believe* has 2 PhDs and used to lecture in computer science. *Very* thorough in his appraoch to things. A classic no BS sort of guy.

www.dvapower.co.uk/

worth reading if you have a K series engine:

http://members.aol.com/DVAndrews/kengine.htm

[OJ]

I'd say coil pack too

[fergus]

Can anyone recommend a cheaper alternative to Caterham's £105 coil pack. I presume the part is the same as per a freelander, etc?

[sam919]

had same problem a few weeks ago, it was posted on here. Coil pack!! lucas part with bracket etc, 36 quid or so if i remember correctly.I think youll be in the right direction with the freelender, we just looked through the lucas book till we matched it.

[fergus]

sam919 said:

had same problem a few weeks ago, it was posted on here. Coil pack!! lucas part with bracket etc, 36 quid or so if i remember correctly.I think youll be in the right direction with the freelender, we just looked through the lucas book till we matched it.

cheers Sam, don't suppose you know the part number do you?!

[jeremyc]

fergus said:

sam919 said:

had same problem a few weeks ago, it was posted on here. Coil pack!! lucas part with bracket etc, 36 quid or so if i remember correctly.I think youll be in the right direction with the freelender, we just looked through the lucas book till we matched it.

cheers Sam, don't suppose you know the part number do you?!

The Intermotor pattern part number is INT12707.

I just walked into a motor factors and asked for a coil for a K series engined Rover and checked it matched the (suspected) broken one. £32.99 inclusive.

ETA: see here

Intermotor Part Finder said:

Replaces
Bremi 11935
Lucas DMB202
Rover NEC100630
Sagem 2526073A

Edited by jeremyc on Thursday 9th October 12:35

[sam919]

Thats the daddy, the problem was a right drama, compression tests re-wired the injector loom, plugs etc all the usuals. Ended up on a rolling road as it was hard to get it to do it wizzing down the local lane (race car with numbers and sponsorts along the side), or on a more technical note when it wasnt under any great load.

Maybe worth wrapping it up in some heatsheild non mettlaic stuff like exhaust wrap, seemingly the starters the same, problematic when heated up as if by magic my starter has just started giving me jip.

Hope it works

Edited by sam919 on Thursday 9th October 14:05

[fergus]

sam919 said:

Thats the daddy, the problem was a right drama, compression tests re-wired the injector loom, plugs etc all the usuals. Ended up on a rolling road as it was hard to get it to do it wizzing down the local lane (race car with numbers and sponsorts along the side), or on a more technical note when it wasnt under any great load.

Mine starts up and idles (and revs up from idle) on what sounds like 3 cylinders (i.e. no load) but only seems to do this when it's been run and then sat and has probably had some heat soak... I'll get a new coil, swap out the old one and see where we stand.

Thanks for your help guys.

[Steve_T]

I'd avoid pattern part coils as they don't tend to be very long lived.

[fergus]

Steve_T said:

I'd avoid pattern part coils as they don't tend to be very long lived.

you mean buy a genuine lucas one?

[Steve_T]

I'm more thinking avoid intermotor than anything else. Haven't found a bosch part number yet, but that's what I'd be looking for. Intermotor ones are ok for a while, but tend to expire quickly in TVRs. I don't know it Caterhams suffer with under bonnet temps to such an extent, but there's reason why these things are cheap. A ton for OEM sounds a bit steep though!

Edited by Steve_T on Friday 10th October 00:20

[fergus]

http://www.jagspares.co.uk/Abingdon/partdetail.asp...

cheaper than intermotor!