Help needed with 8v RV

[Petska84]

Hi guys, I've got a mk1 with a complete mk2 gti running gear conversion done (digifant injection). But I have a problem with it not wanting to idle and also not starting once its been warmed up. Never had a issue with it until I changed the clutch. If anyone has any knowledge with this kind of problem or if they could give me any ideas on how I could rectify this problem would be much appreciated. Cheers

[Stanton]

Earth maybe.

[M M]

Yes as Stanton says you may have forgotten to put the earth cable on the gearbox bolt back.

[Petska84]

Thanks guys, I will have a look today and see if there is earth connected.

[Petska84]

Well today I spent a couple of hours trouble shooting and found that earth from the gearbox is good but the earth strap from the rocker cover to the body got very warm after cracking a few times and also drained all the fuel out and replaced it with some new stuff. as soon as I cracked it started first kick but died in a couple of seconds, pulled out the plugs and noticed they are a little wetter than usual. So my guess now is that its over fueling? Because as soon as the plugs dry up it wants to run.

[M M]

Try to unplug the fifth injector (it's the blue plug on the passenger side of the manifold)and see how it turns on then. My mom's mk2 was doing this same thing until we unplugged it, then it started fine every time. If it's faulty it can cause flooding. If the ground is getting warm it sounds like you need to upgrade your ground cables, should really be done anyway if you haven't already.

[GeorgeMK1]

Come on Peter, still haven't started it yet? haha need a hand bro?

[Golf Loon]

Take a plug out and start it on 3 cylinders
Makes the engine spin faster and you can see how much fuel is getting sprayed into the cylinder.
Done that lots of times in the old days.
When it runs, put the plug back in and it may then start and run on 4!

[Petska84]

It starts once I disconnect the fuel pump but stops after sometime, I've noticed there is a couple of brown wires that are together with the earth strap on the rocker cove, put a light tester on the two wires and one has power. So I then disconnect the two wires and tried starting but nothing, put the wire on that has power back on and it wants to fire up. This has really confused me. I think I will need to trace Back all of the wires that go to the ecu and the dizzy and take all the condue and tape off to see whats going on. I'm feed up ATM and think I might put a set of twin webers on her.

[Petska84]

Take a plug out and start it on 3 cylinders
Makes the engine spin faster and you can see how much fuel is getting sprayed into the cylinder.
Done that lots of times in the old days.
When it runs, put the plug back in and it may then start and run on 4!

Tried the three plug trick but way to dangerous, as the cylinder is pumping out fuel from the spark plug port it's igniting from the spark coming from the leads... = no eyebrows.

[Petska84]

Come on Peter, still haven't started it yet? haha need a hand bro?

I'll be ok George, once I roll it off a cliff. but I think those dellortos are looking good for it ATM.

[Watercooled]

Lots of wierd answers ,IF you are real lucky the ecu won't be toast but it sound like it,ALL earths have to be spot on and connected to clean contacts period.
VW addressed this problem in the very late mk2's and the first mk3's cause there were issues with the first dijifant cars,the ecu suffers because it needs a good earth,if not they cook and overfuel or work @ all.
MM no cold start injector in the dijifant ,its done by the ecu and gets a signal from the temp sensors.
No brown wires will ever have power as they are for earths or ground and are part of that system,bad earths can cause a number of other problems with the engine also.

[M M]

MM no cold start injector in the dijifant ,its done by the ecu and gets a signal from the temp sensors.

Yes true good point, I noticed that after I posted. Got mixed up with my mom's kjet car

[Watercooled]

[QUOTE=Petska84;1007878]I'll be ok George, once I roll it off a cliff. but I think those dellortos are looking good for it ATM.[/QUOTE

Yep the carbs may seem like a solution ,but you will spend a lot less money sorting out the dijifant issues than going to carbs,yes they go well but are very costly to do right and will drive you nuts unless you know LOTS about them trust me.
Your fuel consumption will increase and you will find air cleaners very hard to set-up @ the inlet side of the motor and more don't go there unless you like tuning more than driving.