Had my cossie mapped after having the engine rebuilt, good news & bad news

It made 318 bhp at the fly at 6480rpm & 280lbs of torque at 4792rpm but the good bit is it was only running 1bar boost

The bad bit is that anything over 1 bar it misfires at high revs, which has been diagnosed as a fault with the engine loom, need to save up for a new loom then should be a bit better with 1.5 bar.

Apart from the top end misfire which i know what it needs it runs a lot smoother off boost, so i am pleased with the result.

Simon.

 

 

top effort mate

 

But how does boost affect a wiring loom fault?

Where did you go mate?

 

good result for 1bar,, but im with steve,, whats wrong with the loom?

 

probably the age of it !!!!

 

can't see how an old loom can be affected by higher boost pressures

the HT side of things could be weakened by old age so that you're getting some leakage and a not strong enough spark. but the sensor ecu side is either working or not as far as i can tell.

what spec. have you got to get that on 1 bar boost? something larger than a t3

 

I agree

 

Took it to Paul Hills at EA who put my L8 ecu in & one of his Pectel baby boards & then mapped it (obviously mapping not finished yet due to misfire), left it there for a few days. He substituted every sensor/ecu/tps/plugs/leads/coil etc etc etc & came to the conclusion that the loom is at fault,only happens under load at high revs. I am not a specialist on this sort of thing so i don't know why boost makes a difference, maybe someone on here may know ?
He said he is getting a few old cossies in now with faults in the loom.

All i can say is i am pleased with the work & the bill was very reasonable, i was expecting it to be a lot more expensive.

Simon.

 

 

might be worth checking and doing away with if necesary, the multiconnectors on the loom which join the car half to the engine bay half - these are nottiously crappy with age. i also cleaned the connection of the ecu and made sure every connection in the ecu multiplug was closed up to make agood contact when pushed back into place - they seem to get lazy after being connected/disconnected several times and can cause high resistance connections.

 

I had a similar problem. He changed my whole CPS sensor setup and my loom..

Turned out to be a valve not seating

 

Its on a T34.48

Dave i don't think 3dr's have the multiplug that you are talking about, if you mean the one on the bulkhead, when i had a 4x4 saph i used to get lots of probs with it.
Think its only saph 4x4 & esc cos that have them.

Simon.

 

Sounds good mate. Shame about the loom. Do you drive your car much never seen it about?

 

Ian, no mate i don't use the car much & if i do i very rarely go into Herne Bay. If its a nice dry evening i sometimes take it out for a thrash round the lanes, hardly ever use it in the wet as then i don't have to keep cleaning it !

Simon.

 

3 dr's don't have the multiplugs that can cause grief thru corrosion that 4x4 models have. the engine loom is all in one from the ecu to all sensors.

the ecu loom can only give misfire problems really thru crank or phase sensor problems, but that would not be affected by the boost level. the only thing that would be affected would be the MAP sensor wiring, but this would cause problems whatever the boost.

really don't understand this

 

told you paul was good and reasonably priced. bet it feels guicker than the M3 now

 

yo si,
to me it sounds like your blowin out the spark, try closin the plug gap to 18 thou,
jim text me your good results,
danny

 

Hi dan, Paul had it for nearly a week & said he had tried everything expept a loom to cure the fault & said that he is sure that the engine loom is at fault.

Need to find someone that can supply a loom at a reasonable price.

Did you find out the cause of your engine prob ?

Simon.

 

well engines out and strip'd, melted 2+3 pistons, its run lean, but as for why we dont know yet, gettin ecu, loom and inj tested, might be down to lambda gettin to hot and readin richer than was really runnin.
danny

 

yo si
spoke to dingy last thurs, he hasnt finished your loom, but as your cured ur prob with a gpA coil, do you still want it??

 

sorry mate but i would have another opinion about the loom, get it checked by a comptant auto leccy ( not knocking pauls work at all btw, not making a dig )


im with all the others and so a decent auto leccy shoudl be able to pinpoint the part of the loom that needs replacing



hope ya get on ok

 

sounds to me more likely to be something in the high tension side of it, or bad plug choice.

either that the or the fuel pump is maxing out, id be totally amazed if it was the loom, i really would.

 

as i sed.
si fitted gpA coil and now not missing.
wasn't loom at all.