Hi.
VW Bora 1.6 8V (2000 reg)
After the car only running on 3 cylinders we tryed every HT lead and found in the end that one of the spark plugs had gone pn #2 cylinder . So we changed it yesterday and all was running fine for 1 day.
Was running around in the car yesterday and when we set off from the lights it started running on 3 again. So checked the plugs and everything is fine, Even bought a new set of HT leads but its still the same. I have had the #2 spark plug out again and its really black with carbon with a slight petrol/oil on there.
Am away in it on Saturday, So i need to fine out whats wrong ASAP.
Thanks in advance!.
Luke
Edited by Pugugly {P} on 11/01/2008 at 16:46
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Luke
Step 1; Compression test.
If it's fouling-up the plug in only one day, then there's something awry with that cylinder.
Swap the fouled plug with another cylinder and it'll probably prove servicable - after a few minutes running to clean it up. The fouling problem on #2 will come back though.
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Problem with the coil pack perhaps?
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Hi.
A compression test would be good, But we dont have a compression tester.
Somebody else said the coil pack. BUT when we changed the spark plug the problem went away for about 30miles or more, But came back yesterday after driving around. I thought if the coil pack had gone, Then the car wouldnt start?.
Luke
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Luke
There's an easy check for one turret of a coilpack failing. Simply swap cyl 2's lead on the pack with cyl 3's. [They fire together.]
If the miss then moves to cyl 3; it's the coilpack.
[Or just stick one of the old plugs in #2 lead and hold it 1/4 inch from a good bit of the metal block and see if the spark jumps.]
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compression tester £20.00 at most car accesories shops.
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Hi, Very much need help!......
After the car only running on 3 cylinders last time i replace the #2 spark plug and all was running fine for 1 day. Same problem came back.
I had a place call Volk Service (VW group garage, who are very good) looked at the car had a diagnostic ran on the car and found nothing. Changed all 4 spark plugs all HT leads and it was fine, They gave it a good drive an everything was fine, But today was out in the car done 70miles since it was in the garage and the misfire came back again.
There is no oil being used, no smoke from the exhaust, no water being used, nor any lights on the dash showing up.
Please help!.
Thanks
{moved to original question as related to same problem}
Edited by Dynamic Dave on 20/01/2008 at 14:38
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What were the compression figures? That's the most basic first test.
There's little point in running computer diagnostics if there's no puff in your pot.
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Hi
No compression test was done on the car as far as i am aware. I think then the only thing i can do is take it back.
The coil pack seems fine, Sparks are flying out, And its misfiring on tick over and while revving.
snipquote of mega proportions
Edited by Webmaster on 20/01/2008 at 16:10
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Well, if there's nothing wrong with the ignition and fuelling, then they should have done a compression test.
This is kindergarten-level basic diagnostics; haven't these people got any experience at all? Any competent professional should have got this sussed inside 15 minutes.
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No compression test was done on the car as far as i am aware. I think then the only thing i can do is take it back.
The coil pack seems fine, Sparks are flying out, And its misfiring on tick over and while revving.
The garage has a good reputation, So i can only take it back and see what they say.
Luke
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