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[Kevin Wood]

Might be worth a try with that Lambda unplugged on that basis that that's likely to force it open-loop, I guess?  :-/

Kevin

... Just for a quick try, mind, as the Lambda will be unheated and prone to contamination.

Kevin

[david_omega]

Haven't yet looked at cam timing - but I did comment it will need to be checked, at this rate 

Timing is perfect. 

THEBOY told us at kidlington meet, that we should check the return wires from the coil pack to the ecu.


History of the car is the guy had cooked it, and put new heads on and belts etc...

i took it on UNFINISHED (over heats) due to the oil cooler, trailered it back, and did the oil cooler as it had gunge,  the rest is now current history in the making!
strange tho, it runs fine when cold in the morning,  its an enrichment issue im sure of it,

[david_omega]

ALSO:

We swapped the ECU and transponder the other week RULING OUT THE ECU.


i would check earths if i was you

[Marks DTM Calib]

Sounds more like a closed loop issue to me...does not sound coil pack related.

Hence lambda sensor...I wonder if the 2 lambdas on the 1-3-5 bank are connected correctly....

[JamesV6CDX]

Haven't yet looked at cam timing - but I did comment it will need to be checked, at this rate 

Timing is perfect. 

Don't take it personally mate - when trying to find a fault on a car that's new to me, I try and treat everything as an unknown 

My thoughts soon came to a wiring issue - as TB advised you - but with hindsight, I wonder if it's the wiring to the Lambda, as Mark says, that's at fault.

It would be worth buzzing it through... 

[david_omega]

yeah sure, was saving you time, my mate is head mechanic at vx, he has looked at car in depth, but could only spare so much spare time on the car for me.  you boys are usualy manic with your own work to do.

He checked the timing on the belt and adjusted it a minor fraction.


it doesnt come off enrichment properly. thats the main problem, so yeah check the 135 sensors i would.

[Marks DTM Calib]

yeah sure, was saving you time, my mate is head mechanic at vx, he has looked at car in depth, but could only spare so much spare time on the car for me.  you boys are usualy manic with your own work to do.

He checked the timing on the belt and adjusted it a minor fraction.


it doesnt come off enrichment properly. thats the main problem, so yeah check the 135 sensors i would.

I disagree....

The symptoms sudgest that it works fine in open loop mode using the default maps......what its not doing is working in closed loop mode where the lambdas are inputing to the mixture.

Hence why its fine during warmup and WOT as both these work off the default map....

[david_omega]

ok, well what i meant was, its fine first thing, but then doesnt work fine,  which you summed up.

good luck with it, that car goes like absolute stink, i recomend you get it going

[Mr.Salvador]

wow im not half as technical as some of you guys, but just a thought to add to the mix...i had a hell of a misfire and i swapped the HT leads cos 1-3-5 are the longer HT leads and they run down the back of the engine where it is hottest! have you checked the leads? or did you go straight for the coilpack? as it turned out i needed a coilpack too but i could easily see how the leads might be affected given their position down the back there near the exhaust

[Kevin Wood]

wow im not half as technical as some of you guys, but just a thought to add to the mix...i had a hell of a misfire and i swapped the HT leads cos 1-3-5 are the longer HT leads and they run down the back of the engine where it is hottest! have you checked the leads? or did you go straight for the coilpack? as it turned out i needed a coilpack too but i could easily see how the leads might be affected given their position down the back there near the exhaust

Coil pack sits directly on top of the spark plugs on the 2.6/3.2 V6s so there are no leads as there are on the earlier V6s.

Kevin