Hey guys. I know I ask for a lot of help aha but I just swapped a injector connecter to a new one and it wouldn't start. I also cleaned some other connectors such as the one on the timing belt cover... I secured it all then tried it and it was turning over but never fired. I jiggled the connecter around and eventually it fired on 5 cylinders. The one that wasn't was the one at the back on the right. Managed to get it on 6 after a while but sometimes drops to 5 for 3 seconds then goes to 6. At idle before this it misfires, roughish idle. But drives fine in the higher rpm.

I know I ask a lot aha

Yes, it's a possible PTU problem. Or the associated loom.

Yeah thankyou. Was just looking at some as I am gonna get one with a sub harness. So damn expensive

I would say you'd be better off borrowing a good working one form someone first..

 

do the FULL check and clean off all electrical connectors ... PTU, CAS, coils, injectors, TPS ... etc.. first (particularly after a wet winter).

 

it might save you a fortune.. good luck.

Yeah I have cleaned a lot of the connectors that may be a cause and it still idles rough and misses slightly

I've a spare ptu that you can try I'm only in Sheffield just off junction 31 of M1. End of M18

 

Cutty

I've a spare ptu that you can try I'm only in Sheffield just off junction 31 of M1. End of M18

 

Cutty

 

Oh right cheers for that mate. Might have a look when I am next off aha

Going on for a bit this. Is it possible for it to be the injectors or one of them loosing a bit of resistance? Just wanna narrow it down a bit

yes to all the above.... did you clean all the connectors and make sure they are good?

 

for all the loom.. :)

 

I can say form experience that you are bet off to do a full PM on the car before replacing any components ...

 

look at the 6Ps .. best of luck.

Thankyou medallion man :)

6 ps? Don't get it?

I have changed all of the coil pack connectors... 5 of 6 injector cables. Cleaned ptu cables and cas cable plus the maf. Any cable I could find I have cleaned... I may have missed one or two but also is there any common cables that might go towards engine missing?

Prior preperation prevents poor ptu performance or something like that :lol:

That's cool. I like that aha.

 

Update... changed all of the injector cables now. Still missing however :(

Forgot to mention aswell. A bit ago now once cleaning all the connectors of the ptu etc. Was running fine then started running on 5 for no reason. Then started idle hunting going from 900rpm to 1500rpm then to 600 rpm and so on. Until I stopped, checked all connectors... They were fine. I turned it off and back on. Ran a bit rough but came to 6 cylinders eventually and ran alright but missing from there

I have a thread on a similar topic mate. It could be a lot of things, I found a thread on here started by JeffTT that showed how a relay in the fuse box can knacker your engine up too. I'll have a look hang on...

Think I have narrowed it down now... cylinder 6 injector has a resistance of 14.9 ohm while cylinder 5 I think has resistance of 12.9. Cylinder 6 the problem?

have you sort out the problem mate?

Yes mate. However car still has bad idle where the note in the exhaust breaks. But I have had all new injectors and connectors :)