another Kjet problemooooo

[twin eng, twin turbs]

I had a similar problem on my mk2 gti some years ago and it baffled me trying to find the issue with system. Mine ran rough at idle until it warmed up and would sound like it was on two or three cylinders for the first 30 seconds of running or less. I ended up pulling off the K-jet and replacing it with a full programable system but when i stripped it all down i found my warm up regulator mounted on the block was coroded inside and would have been the issue of my dramas. It would be the part i would check carefully in your case.

[86gti]

I had a similar problem on my mk2 gti some years ago and it baffled me trying to find the issue with system. Mine ran rough at idle until it warmed up and would sound like it was on two or three cylinders for the first 30 seconds of running or less. I ended up pulling off the K-jet and replacing it with a full programable system but when i stripped it all down i found my warm up regulator mounted on the block was coroded inside and would have been the issue of my dramas. It would be the part i would check carefully in your case.

Nah it isnt the WUR...
This will idle fine after it plays up if u rev it up to clear the plug of fuel...
then runs, idles and does everything right......
Think the nail was hit on the head early.......
Went to take it to the Merc specialist to see if he could do the injectors...He has retired...lol.

I'd be 99.9 % shure it a slow leak in the injector(s).....
I've found it only does it after its left for over about 15 hrs or so...
went for a run lastnight at 10ish...started fine at 8 thismorning....
Left it all day at work, fired fine at 5.30...

Going to rip the injectors out on sat and see if ive got any leakage....
....
What usually cause the leaking Injector??
Will they possibly just need a new seal kit??
Or a new unit.... Ive never really done any research on the injectors themselves

Talked to a local bosch outlet..they said in most cases a new seal kit will fix it...
5 dollars a kit...for each injector.

[Peter Jones]

The injector themselves are a sealed unit. There's really not much inside them. There's a tiny filter and a tiny pintle valve. The only moving parts are the spring and the pintle itself.

The seal kit won't stop them from leaking fuel but it might help with idle issues.

They're really easy to get out btw, just pull on them! they're only held in by the o rings in that seal kit. If they're stubborn use two screwdivers either side of the injector and lever off the rocker cover.

The seal kit is the o rings in the bag in this pic.
The brass things are the injector holders, designs vary.



Pete

[Jmac]

Yeah you will have to replace them if they are dribbling mate.
JMac

[86gti]

ok, cool..
Ill go see the local Petroject...
I don't have any idle problems, only Idle problem it the fueled up plug...give it a good rev and it clears ... idle is fine even when dead cold.

But I would say that is exactly what it is..
Good thing i just got tax back..haha.
I'll inspect them on the weekend and order some new ones next week if thats what it turns out to be..

Thanks again PPL.

Keep you informed.

[86gti]

Well, i was all set to rip the injectors out last weekend, but now it is starting properly again..
Dont know what the deal is...
But i think it might be a good idea to replace the injectors anyway.
Mostly everything else had been replaced on the system now...So injectors should top it off...lol.