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Andy-M
Inexperienced
Joined: Jul 12, 2010
Posts: 23
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Posted:
Wed Dec 05, 2012 9:37 pm |
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6 months ago i decided to change the cam belt on my coupe 16v (ace). After that it seems to developed a strange habit. Its almost if its to far advanced. Its difficult to explain but when starting its almost if its trying to fire before it should as if its sparking before the piston gets to top of its stroke. Also there seems a lack of power low down. Over the summer i`ve just put up with it but now the colder weather has arrived it seems to have got worse.
So today out in the cold i go take the belt off and started again. I`ve checked and double checked the timing marks and all spot on. Went for a drive and still the same. I was so hoping to find it was a tooth out but found nothing. So now stumped and out of ideas..... Help |
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hoolio
Got Nothing Better To Do
Joined: Sep 22, 2006
Posts: 1034
Location: surrey
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Posted:
Wed Dec 05, 2012 9:45 pm |
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Have you checked in triplicate all timing marks,crank,flywheel,cam belt sprocket,dots on both cams and the dizzy?? |
_________________ 91 16v quattro,modded airbox k&n ,CAC zorst, spax vsx suspension, tubular manifold, de-cat, p&p head, KR cams a bit of this an that
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Andy-M
Inexperienced
Joined: Jul 12, 2010
Posts: 23
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Posted:
Wed Dec 05, 2012 10:09 pm |
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Yep had the cam pulley mark is spot on, the "0" on the flywheel lines up with the edge of the casing and the (with cap off) the rota is bang in the middle of the line on casing with is no 1.
I found this in another post which i don`t understand
"normal method is to the stick a fuse in the fuel pump relay to enable diag mode if you want to run a strobe"
were do you put the fuse? removed fuel pump relay but the tabs dont line up to take a fuse so don`t understand. |
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jamiecoysh
Bandwidth Buster
Joined: Nov 19, 2008
Posts: 901
Location: DEVON
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Posted:
Wed Dec 05, 2012 10:21 pm |
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your engine doesnt have a blink test for getting codes or The fuel pump relay ( which is silver/grey in colour ) would have a slot in the top for a fuse, that you need to put in if you want to fault find using a blink test. I beleive your ACE engine just plugs into vagcom hence no need for that system
That a side i dont think that the fuse in that relay has anything to do with timing setup its soley for fault finding ( which is hopeless and doesnt work anyway ) |
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hoolio
Got Nothing Better To Do
Joined: Sep 22, 2006
Posts: 1034
Location: surrey
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Posted:
Wed Dec 05, 2012 11:11 pm |
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have you had the cam cover off and checked the dots are aligned,I only ask as I had similar and it was only 1 tooth out at th chain end.
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_________________ 91 16v quattro,modded airbox k&n ,CAC zorst, spax vsx suspension, tubular manifold, de-cat, p&p head, KR cams a bit of this an that
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Mikes2
Site Moderator
Joined: Jan 31, 2003
Posts: 9144
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Posted:
Thu Dec 06, 2012 9:13 am |
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jamiecoysh
Bandwidth Buster
Joined: Nov 19, 2008
Posts: 901
Location: DEVON
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Posted:
Thu Dec 06, 2012 12:22 pm |
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so would the models with the fuel pump relay that uses the fuse need the fuse to be fitted in order to adjust timing mike? |
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merton
Bandwidth Buster
Joined: Dec 03, 2010
Posts: 574
Location: surrey
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Posted:
Thu Dec 06, 2012 5:45 pm |
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when you line up the dizzy, if the flywheel and cam is at tdc the dizzy arm should be at 6 degrees past the line on the edge of the distributor body. i dont know if the flywheel marks are the same on the 16v but on the 8v there is a line at 6 degrees before tdc number1 and then a O which is lined up half way with the edge of the veiwing hole, the line at 6 degrees before is what i used to line up the dizzy arm with the line on the egde of the body and it runs perfect. from what you said it sounds as i did the same as you may have done and lined the dizzy pulley a tooth out which puts the marks all at tdc and not having the 6 degrees for the ignition timing. |
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Mikes2
Site Moderator
Joined: Jan 31, 2003
Posts: 9144
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Posted:
Thu Dec 06, 2012 6:15 pm |
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jamiecoysh wrote: | so would the models with the fuel pump relay that uses the fuse need the fuse to be fitted in order to adjust timing mike? |
it's to enable diagnostic mode. you can't run a strobe light off #1 plug lead if not in diag mode.
regarding the flywheel. there are 144 teeth and the flywheel rotates twice for each camshaft rotation.
each tooth represents 5 degrees (5*144 = 720) |
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Andy-M
Inexperienced
Joined: Jul 12, 2010
Posts: 23
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Posted:
Fri Dec 07, 2012 4:29 pm |
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Blimey getting more confused. There are two marks on flywheel one for TDC and the others the 6 degree advance and one on the dizzy. Lined all the TDC marks up including the one on the dizzy static then i adusted the timing with a strobe line to get the 6 degree advance to line up with the edge of the bell housing using the adjustment on the dizzy. So this not right then? |
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Mikes2
Site Moderator
Joined: Jan 31, 2003
Posts: 9144
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Posted:
Fri Dec 07, 2012 4:33 pm |
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that sounds correct, although there's some notes about plugging vacuum on the link above.
Never quite sure how important that is. Does the dizzy have vac advance or is it all ecu controlled.
It's essential that the adjustment is made on a warm engine and the that the fan is not running when any adjustments are made. |
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Andy-M
Inexperienced
Joined: Jul 12, 2010
Posts: 23
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Posted:
Fri Dec 07, 2012 5:01 pm |
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Cheers got something right..... There`s no vacuum on this model its all electronic. |
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merton
Bandwidth Buster
Joined: Dec 03, 2010
Posts: 574
Location: surrey
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Posted:
Fri Dec 07, 2012 6:43 pm |
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if you haven't got the engine in basic settings you will not be able to set the timing with a stobe, i made a mess of my timing by moving the dizzy around. the way i sorted mine out was to line everything up to tdc and then i got a timing dial printed on a piece of paper and fixed that behind the crankshaft pulley( on the lower cam belt cover plastic ), lined that up at 0,then turned the crankshaft back 6 degrees, as indicated by the timing dial, and turned the distributor so the centre line on the rotor arm was in line with the mark on the egde, a basic way to do it but after lots of trys this worked for me, does your distributor/oil pump pulley have a dot on it like this picture, |
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