Mk3 2.0 8v wont start following throttle body and distributor clean

[Adezmk3]

Hi,

Basically my 8v AGG won't start following having the cut out problem and not revving past 5000rpm.
I removed the throttle body which was caked in black grime and cleaned that thoroughly, then reassembled it.

I then foolishly got carried away and thought spraying some contact cleaner through the dizzy wouldn't be a bad idea (without seeing if the throttle body clean had worked) as the 5000rpm limiter has occasionally not happened so I assumed it could just be dirty in the distributor. Now the car wont start and I don't know if that is a result of the throttle body clean, or the dizzy.

When turning the engine over I can smell fuel and upon checking the plugs they are getting wet with petrol.

I checked I was still getting a spark which I am, but have no way of telling if its sparking in time.

I have now changed the dizzy cap and plugs and the car still won't start.

Any suggestions? I'm betting on the dizzy being at fault. Does anyone know where I can buy a recon or replacement one that isn't £110 like from VW?

Cheers

[javalin]

did u plug the cam sensor and throttle plug back in?

change the dizzy arm as well.  did u just use carb cleaner?

did u put the plug leads back in the right order?

james

[Adezmk3]

Thanks for your response,

Rotor arm wasn't in stock, leads looks like they need replacing (slight aluminium oxide corrosion in them) but I'd rather leave replacing them at £25 a set until I've ruled out the really expensive items (distributor)

Unfortunately I did plug everything back in correctly and I'm 100% sure in terms of physical connections everything is fine. The only exception is I didn't use a new throttle body gasket. I am ordering a replacement one for piece of mind but I suspect it is unlikely to be that.

Does a faulty hall sensor/dizzy and faulty throttle plug show up on Vag com?

Has anyone got any info on some multimeter checks I can do on the loom and sensors themselves?

Also does anyone have a wiring diagram?

Thanks very much,

Adrian

[javalin]

what engine is it?  AGG?

Not sure what you could have disturbed really.  The crank sensor would be an obvious no-spark candidate, but you haven't touched that.

>Does a faulty hall sensor/dizzy and faulty throttle plug show up on Vag com?
yes - depends how faulty though.

The gasket wouldn't stop it starting, nor would anything you've done.  Unless the wiring is broken on the loom to the throttle body I wonder - but a bit out there.

Did you take the rotor off when you cleaned the dizzy?  Could be sparking out of order?

James

[Adezmk3]

Yes its an AGG, and yes I took the rotor arm off, but like I say I reassembled everything exactly as it was removed, the rotor arm and dizzy cap are keyed on my car so can only go on in 1 position. Tomorrow evening I will remove everything again and triple check but I have double checked already so suspect it has to be electrical. Any ideas on checks I can do with a multimeter?

Thanks for your help,

Adrian

[DOA]

No help Im afraid but hi Ady, Mike here from work  .

[Adezmk3]

Hi,

I have tried a different throttle body and still get nothing, is there a way to reset the throttle position sensor perhaps?

Thanks

Adrian

[javalin]

yes,  you can do a calibration using vcds (vagcom) on the AGG

i doubt that would cause a non-start though.  if you hold the throttle open when u crank, you eliminate a prob with the motorised part anyway.

vcds would also tell u if the tps was working (live data read)

[Adezmk3]

thanks, a non-ebay vagcom hasn't given me any help at all really. I've tried a different coil on the car now as well and still have nothing, the car just refuses to fire.

[javalin]

shame ur not more local.

http://faculty.ccp.edu/faculty/dreed/campingart/jettatech/nocrankdiag/index.htm

any help in the link above?