GolfGTIforum.co.uk
Model specific boards => Golf mk2 => Topic started by: gavL on 02 August 2010, 14:53
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So after smashing the Dizzy when trying to get it off finally found a replacement unit, exact same code etc.
Placed it in and the car wouldn't start so done the following:
- The car is a 1990 8v Digifant GTi
- Ensured TDC
- Placed oil pump at correct setting
- Made sure the flywheel was turning when moving the crank by hand
- Checked to ensure a spark was coming through to Cyl1 by unplugging the spark putting it into the HT lead and placing it against the block
- Made sure all HT leads where in the correct place
- Made sure that the Rotor Arm was facing HT1
- Made sure the car was getting fuel
- Checked all earths, cables etc I also checked all the wiring to the Hall Sender but all seems fine
The only thing that changed on the car was the Dizzy and I'm sat here scratching my head at this point. Any input would be appreciated.
Cheers
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So after smashing the Dizzy when trying to get it off finally found a replacement unit, exact same code etc.
Placed it in and the car wouldn't start so done the following:
- The car is a 1990 8v Digifant GTi
- Ensured TDC
- Placed oil pump at correct setting
- Made sure the flywheel was turning when moving the crank by hand
- Checked to ensure a spark was coming through to Cyl1 by unplugging the spark putting it into the HT lead and placing it against the block
- Made sure all HT leads where in the correct place
- Made sure that the Rotor Arm was facing HT1
- Made sure the car was getting fuel
- Checked all earths, cables etc I also checked all the wiring to the Hall Sender but all seems fine
The only thing that changed on the car was the Dizzy and I'm sat here scratching my head at this point. Any input would be appreciated.
Cheers
The notch on the flywheel in the gearbox cover?
So the car is getting spark, the cylinders are getting fuel
Does it sound like its firing when you try and start it up?
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does the rev counter jiggle when car is cranking
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It does!
I thought that was a sign but kind of looked past it. Hall sender is getting power
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ok that means ecu is seeing a rev counter signal from the hall sensor, i take it fuel pump primes yes?
i think you need to go back to the timing again, is the rotor arm lined up with the small line on the dizzy when the cam and crank are both at TDC? and you are using the small thin line, not the big notch where the dizzy cap locks into
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Yeah it primes fine, took out the Spark Plug from number 1 and it sprayed out after trying to start a couple of times.
Using the big notch for the rotor arm.
Back to basics and reset the timing and everything?
So if I get this right, ensure everything is at TDC again, then ensure that we are using the small thin line?
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yeah that'll be why, big notch is 180degrees out, you need to use the really small thin line on the dizzy. if you look at the plastic dust shield there should be a tiny notch cut out. It looks like this, pic of a 16v dizzy but you get the idea:
(http://vwtech.no-ip.info/images/golf/timingdizzy.jpg)
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As usual you where exactly right, that was a bit of a learning experience. It starts now and will stay started for a few seconds so going to knock all the belts off again and go through it again and ensure that everything is set to TDC when the rotor arm is set to the line.
Cheers as always mate! :)
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I only thought of it because another mate of mine had done exactly the same as you, glad it was an easy fix :)
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Sorry for raising this from the depths.
Still got issues the car starts on first stroke and idles at 1100rpm and engine seems stable, but the rev needle bounces up and down. Had the belts off and on numerous times now thinking its a timing issue.
I keep on coming back to it thinking that its the Hall Sender or Coil? Can anyone shed some light on it?
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Have a run through this http://www.golfgtiforum.co.uk/index.php?topic=49436.msg1520084#msg1520084
Might help highlight if its the hall sender / coil
Incidentally, when you say the rev needle bounces - does the engine hunt too (or is it just the clocks)? Does it do it when its hot/cold?
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I will get the engine to temp and see, its just very erratic it will show the true revs for a split second then go to like 3k and then down to 0 bouncing back and forth, it never really settles. The engine its self stays constant. I will get a video also when I'm back on Friday of exactly what its doing :)
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I will get the engine to temp and see, its just very erratic it will show the true revs for a split second then go to like 3k and then down to 0 bouncing back and forth, it never really settles. The engine its self stays constant. I will get a video also when I'm back on Friday of exactly what its doing :)
Whats the condition of the coil > head earth like?
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Pretty good, I know that it fires on all cylinders as I checked them against the block and if its sparking I guess that means the coilpack is okay?
Will run the test you have in your thread to check the Hallsender. Any ideas where you can get a new Hallsender from? Or just worth buying a Referbed Dizzy?
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Decided its got to be the replacement dizzys Hallsender I got the thing for £10 so can't complain. Just splashed out this morning on a new Bosch dizzy £101. Thank god I get things at a reduction..
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So replaced the dizzy with a new one and no luck. Pictures of video and setup of TDC below. I'm stumped I really am... :huh:
(http://img88.imageshack.us/img88/2947/img0217sm.jpg)
TDC On Crank
(http://img687.imageshack.us/img687/783/img0218uz.jpg)
TDC on Flywheel
(http://img801.imageshack.us/img801/9311/img0220z.jpg)
TDC on Flywheel & Rotor arm facing 1
http://www.youtube.com/watch?v=kigeXH0Aa9g
Engine turns when we twist it still nothing.
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Intermediate shaft? Sat reading the Haynes manual and I get this sneaking feeling that it may not be said to TDC, but I thought if this wasn't at TDC then the rotor arm would be pointing else where?
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you arnt using the large diamond mark on the flywheel to set tdc are you? if so thats wrong. you set flywheel to tdc using the smaller punch mark. the big diamond is for setting the ignition timing with a timing light, for info on how to do that read the digifant tuning guide.
heres a better pic of what you are looking for, massive diamond is ign timing mark, small punch mark is TDC marker:
(http://vwtech.no-ip.info/images/golf/flywheelmark.jpg)
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Ahhhh! Set it all up but the battery is dead so waiting on it charging now.
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So went over everything again set to the TDC, checked every mark etc. Twisted dizzy back and forth and it just won't fire.
This is really stressing me out...