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82
Engine & Gearbox / Re: Won't stop priming
Last post by Iainh99 -
Hi thanks for the reply, I've got a spare ECU so will try that tomorrow. I'm going to check the wiring with a multi meter before I commit to plugging in my only spare.

I've already dropped the oil, so good shout.... it was significantly watered down with all the fuel going into it.
83
Engine & Gearbox / Re: Won't stop priming
Last post by Monkey -
Hi,

Is it possible your main earth has become lose?
If so, the chances are your ECU has died:
When the main earth loosens, the car uses the ECU earth as the main and it fries it.
The main symptom for this is the injectors being stuck open.

First thing you need to do is drop your oil out and replace it with new, then fit a new ECU and try again.
If you successfully get your car to fire now, the diluted oil will kill your engine... ask me how I know!!
84
Engine & Gearbox / Won't stop priming
Last post by Iainh99 -
Hello,

So I'm putting my 1988 golf gti 8v back on the road, I recently passed its mot and returned home. It'd been off the road for around 5 years.

Couple of days go by and I reckon it'd be a god day for a blast. However it won't start. Nothing not even a click.

Tray the key a few times, try charging the battery and try the key again.

So I swap the starter for a spare one as im sure i saw it smoke a little and try again. With the replacement in this time the engine turns but the pump won't stop priming..... so much so that petrol starts coming down the exhaust having filled the cylinders.

I've changed the fuel pump, fuel regulator, vacum hose to regulator, injectors, pump relay, I've cleaned earth's point and connectors, I've made sure the fuel supply and return lines aren't blocked

But it still will not stop priming. Any ideas? Cheers
86
Members' Cars / Re: G135EPB 8v GTI
Last post by ianmac86 -
28/09/25 – 02A & 02J Gearbox Stripdown for Quaife Swap

After a few months of it sitting at Dan’s place, I finally went over to strip down my old 02A gearbox with the Quaife LSD(with help). I'd swapped this box out for a 02J with a 3.9 FD a while back, but now it’s time to move the Quaife across to the new box.

I also brought the replacement 02J gearbox with me — this one had never been opened before. Stripping both boxes down was actually easier than it probably looks in the photos, but the 5th gear on the 02J was a nightmare to get off. Took a lot of persuasion and finally came off with a puller.

The diff rivets can now be drilled out that’ll be the next job.

Since the seals have been disturbed, I’ll be replacing:

Input shaft guide sleeve 02A141180A

2x Output shaft seals 084 409189B

Interestingly, the input guide has an 02A part number and a late 1999 date stamp, which is interesting to see, maybe a crossover period for early 02J parts?

I’ve ordered the new seals and bits and should be collecting them on 30/09/25, with a view to rebuilding the box on 01/10/25, if all things align.

After that, it’s just a case of getting it fitted back into the Mk2 and seeing how the 3.9 FD and Quaife feels on the road.

🙂







87
Technical / Re: rev counter issue
Last post by Monkey -
As above, when I restored my red one, I had to swap out the injectors for a similar problem.
Also, go back to basics, check fuel and spark.
I'd pull the plugs out, then turn it over and make sure you have spark.
Then put them back in (dry), take off the coil lead and try turn over again, pull out all the plugs and make sure they're all wet, that'll account for fuel. If you have plenty of both, it's either mixture, or timing.
88
Members' Cars / Re: G135EPB 8v GTI
Last post by ianmac86 -
I took it for its MOT on 20/9/25 as it had ran out for the 1st time since my ownership. Glad to say it passed with no advisories  :)


I only drove it too and from the garage about 8 miles all in but car drove fine. Coolant needs topping up which i really hope is just some air left in the system!

Later in the week I decided i was going to get ready for the Quaife to be fitted. So back in the air and gearbox off. Although its been in and out more time than i care to remember, I've never done it alone. Mainly due to a lack of confidence and the gravel driveway. I felt that it needed to be done at home so I'm not leaving it somewhere other than my own driveway to remove the need to get it back driving asap. I was amazed the time i took the first photo with the bonnet up and to the time i took the photo with the box on the floor was 1hr 20 mins. The hardest part was lifting the box at enough of an angle to get the cup over the flywheel. I have to admit when the box came down onto my chest i got myself a bit stuck 😂 the weight combined with the car sitting fairly low to the ground meant i didn't have much room to actually get myself out from under the car. After a short struggle I freed myself and dragged the box out- had to remove the splitter for it to come out the front!
Started 11:50

Finished 13:10

There was 1 casualty - gearbox bracket collared bolt m8x92 which i need to get hold of a spare if anyone has one?


As i had some free time I decided to fit the missing flaps of the fan cowl and my new Febi fan. I know the cowling needs a paint but this is way down the list of priories at the minute!



Also picked up an induction kit for noises! I'm not sure if i will keep it yet but it's a bit of fun. Its meant for a mk4 golf with an 80mm maf. I've trimmed down the heatshield and used the off cut to make a temporary bracket to secure it the the chassis leg and removed the lower blank to allow some more cold air through. I've got a cleaning set from Rami Air so will do that when i get the opportunity. the ABF intake is 70mm so fitted and 80>70mm reducer and some alli pipe to join them together. The intake temp sensor has been mounted to the heatshield for now. I still need to trim the pipe down but i might see about replacing the whole intake with 90 degree silicone elbow for a nicer look but so will hold on for now.






At the weekend i'm hoping to rip the old 02a apart to remove the Quaife ATB and maybe take the new 02j apart to ready to remove the diff rivets from the crown wheel (horrible job). I've got new diff bearings as well. All of this is best done with some help if i ever want it to work again! So going to rope in Dan, hopefully for guidance more than just taking all of his spare time.
89
Technical / Re: rev counter issue
Last post by scs -
I have very slowly progressing a similar fault. Tried lots of items new blue sensor new fuel pressure regulator new plugs. Spayed brake cleaner on all the vacuum lines . No improvement by now running low on fuel new fuel problem virtually disappeared still a bit temperamental but loads better I now think the injection nozzles might be a bit clogged as its occasionally cutting out when the revs drop to tick over usually its fine drops to 900rpm but not always but restarts straight away.