Hi All,

 

I hope you can help.

 

My car has been off the road for a few months, this weekend I decided to get it sorted and back on the road.

 

I took it out for a blat last night and everything was fine, (still suprises me how quick a Zed is, ;)), but this morning it's decided that it only wants to run on 5!

 

I have plugged in the ConZult and discovered that it's No.5 that's at fault, I've swapped the coil pak, cleaned the connectors and swapped spark plugs but to no avail. :(

 

The monitoring page on the ConZult has the LH Lambda running at twice the voltage of the RHS.

 

I haven't carried out a compression test yet, as I haven't got much more time to 'play' this afternoon. When I swapped the plugs the old plug was dry, rather leading me to think it's a blocked injector. Does this make sense?

 

I haven't pulled the injectors before, is it straight forward as I can't find the procedure in the manual.

 

Any suggestions/advise welcome.

 

Thanks

 

Tim

 

PS Mac1 are you still fuming :mac1: with me or shall we burry the hatchet?

tried cleaning (or maybe even swapping) PTU ?

otherwise it's probably that "green stuff" on the injector connectors that is causing the problem.

Injectors fail gradually over time in 95% of the cases...never seen one fail suddenly overnight.

 

-Eric

Thanks Eric, I'll have a look this morning. I must admit that I was very suprised that it suddenly developed this problem.

 

Tim

i had same problem a while back and the injector connector was at fault , try wiggling it and see if it suddenly improves , if so remove it and clean it all up or you could even buy a new connector.

tried cleaning (or maybe even swapping) PTU ?

otherwise it's probably that "green stuff" on the injector connectors that is causing the problem.

Injectors fail gradually over time in 95% of the cases...never seen one fail suddenly overnight.

 

-Eric

 

also worth doing a resistance check through the injector with an ohmeter while youve got the connectors off, as if an injector does fail suddenly, it will usually be within the windings of the solenoid that go.

also worth doing a resistance check through the injector with an ohmeter while youve got the connectors off, as if an injector does fail suddenly, it will usually be within the windings of the solenoid that go.

 

Thanks Paul,

 

If it ever stops raining I'll get out there with my meter!

 

Really wanted to get it MOTd this week :(

 

Keep your fingers crossed.

 

Tim

PS Mac1 are you still fuming :mac1: with me or shall we burry the hatchet?

 

 

YOur not gonna start barking over my choise of dogs either are you :x:

YOur not gonna start barking over my choise of dogs either are you :x:

 

Sorry?? :confused: Have I missed something?

 

Tim

Sorry?? :confused: Have I missed something?

 

Tim

 

yeah - Chris cant spell "choice" :D

yeah - Chris cant spell "choice" :D

 

 

 

:rant: :rofl: :D

 

Tim NM if you cant remember must have been just one of those things that stuck in my mind

YOur not gonna start barking over my choise of dogs either are you :x:

 

Sorry?? :confused: Have I missed something?

 

Tim

Sorry about the double post, don't know what happened there.

 

Chris, don't remember having a 'pop' but hey, nowt new there. :D

 

Tim

PMSL, just spent 10mins trying to find what you were on about. I can't believe you've held a grudge over my comments about getting a rescue dog rather than buying from a puppy breeder.

 

Anyway, accept this as my apology and let that be an end to it.

 

Tim

PMSL, just spent 10mins trying to find what you were on about. I can't believe you've held a grudge over my comments about getting a rescue dog rather than buying from a puppy breeder.

 

Anyway, accept this as my apology and let that be an end to it.

 

Tim

 

No worries was just winding you up fella :rofl: :rofl: :rofl:

Okay, now I'm skuppered!

 

I've had the injector connector off and it was a little 'green', but not too bad tbh.

 

I checked the resistance and it showed 12.2Ohms so that's well withing the 10-14Ohms that the book gives as spec.

 

I've also cleaned the PTU but I've still got a miss on 5!

 

Any ideas please.

 

Tim

did you do a compression test tim?

Paul, I've just done a 'quick and dirty' compression test, i.e. 2 cylinders, yes, I know I should do all 6 but if its that bad I thought it would show up.

 

Anyway, I did a test on 5 & 1 and both came up as 170psi.

 

The plug is 5 was dry as a bone.

 

My thoughts also turned to the PTU, but that controls the coil paks, doessn't it and therefore the injectors would still be pumping in fuel?

 

Tim

Paul, I've just done a 'quick and dirty' compression test, i.e. 2 cylinders, yes, I know I should do all 6 but if its that bad I thought it would show up.

 

Anyway, I did a test on 5 & 1 and both came up as 170psi.

 

The plug is 5 was dry as a bone.

 

My thoughts also turned to the PTU, but that controls the coil paks, doessn't it and therefore the injectors would still be pumping in fuel?

 

Tim

 

think i may have a spare PTU kicking about if you want to test it?

think i may have a spare PTU kicking about if you want to test it?

 

 

Yes please, mine in an original S1, so I guess its time that it went, I've looked at the service manual at the continuity testing procedure but mine doesn't do anything that the book says it should, which I thought was odd as the car seems to run fine apart from this one cylinder.

 

 

Don't suppose you have the PTU with you at work? :D

 

Tim

 

 

Don't suppose you have the PTU with you at work? :D

 

Tim

 

yup ;) when do you want to come over?? :D

 

mines a s1 that i repaired until my s2 got here from the states

yup ;) when do you want to come over?? :D

 

mines a s1 that i repaired until my s2 got here from the states

 

Any chance I could pop over now (about 30mins from here)?

 

But, am I right in saying that PTU controls coilpaks rather than injectors? And I don't seem to have any fuel getting through.

 

Also, as a long shot, could it be the RL TC playing up as that cuts injector pulses doesn't it?

 

Tim

Any chance I could pop over now (about 30mins from here)?

 

But, am I right in saying that PTU controls coilpaks rather than injectors? And I don't seem to have any fuel getting through.

 

Also, as a long shot, could it be the RL TC playing up as that cuts injector pulses doesn't it?

 

Tim

 

yes, your more than welcome to come over now - i'll be here till about 6.

 

yes, the PTU does control the spark, & yes, the RLTC cuts into the injector wires.

 

sometimes its difficult to see if its not fueling at all as the piston just tends to force the vapours out, unless its overfuelling the plug doesnt always get soaking wet if thats what your looking at

Just got home and tried the PTU, still running on 5! :(

 

Any suggestions as to what to check next?

 

Tim

bummer, as i said, check the wiring to the injectors, especially through the RLTC connectors. if thats ok its prob worth removing the RLTC out of the circuit & reconnecting the wires direct to the injectors in case the RLTC unit has a fault

Paul,

 

Sorry to keep badgering you. I've looked at the 'book' and the only figures I've got to check the injectors are 11-14V with ignition off.

 

I want to check that there's a signal a) coming out of the ECU/RLTC and then b) at the injector. There are 2 pins on the injector plug, do I assume one should cycle 12v on/off?

 

Also I want to do the same with the Coil Pak, as I've eliminated the pak itself, but not the signal going to it, there are 3 pins in this instance, what should I be looking for, 12V on one etc etc?

 

Than, as you say, if it's not resolved its out with the soldering iron to remove the RLTC. (Last resort really, as it took me ages to wire the bugger in in the first place:D).

 

Thanks M8, guess at this rate I'm going to owe you more Vodka and Bud. :D

 

Tim

 

PS: That CD... if it doessn't run, do a search on here about moving the .inf file around, but you probabally already did that. :D

iv not looked at the z32 wiring, but usually for coils & injectors, they have a permenant 12v feed & the ecu switches the earth to trigger them.