Not running on all cylinders.....

[Knight Rider S4]

have you done a compression test ?...would do this first as you could be spending money for nothing

you will need one of these

http://www.amazon.co.uk/Draper-37442-Compression-Tester-14X18mm/dp/B0001K9TV0

Have you checked the wiring of the coil going right back maybe earthing which could be causing the problem

If you think it is the coil swap it over from another and see if problem moves on to another cylinder

cheers

[mdudziec]

Ah, OK, thanks for that Knight Rider. Compression tester sounds good. Now for the embarrasing question...

... where do you screw it into to?

I replaced a coil pack with a new burrel one, which came with a length of cable attached. I noticed that all the wiring on the original coil pack was cracked. So I pulled it all out and replaced with the new cable right back to the POS (yellow) and back to another connector for the Black, where I cut the old cables, leaving just a short tail at the plug, and soldered the new ones onto that.

I though the coil packs had fixed wiring and didn't think it was possible to swap the coil packs around. Is that right?

[shortsport]

The spark plug hole

[mdudziec]

yeh...

...of course.

Thank you

[Knight Rider S4]

LOL.......you take the spark plug out and screw in to there till tight then turn the engine over to get your reading .take the readings of all the cylinders so you can get a good idea of what it should be think it should be around 9-10bar but not sure


Just checking the coils get back to you

[Knight Rider S4]

Read this thread

http://www.s2forum.com/forum/showthread.php?t=10234

cheers

[mdudziec]

Ah, OK.

So you just turn it over, I don't need to start it, do I?

[aerobreaker]

No dont start it, remove all the plugs aswell, and do all the cylinders, you are looking for more than half a bar (pressure difference between the cylinders) if its low on cylinder 2, put a teaspoon of oil into the spark plug hole and redo the test, if the pressure increases then the rings are suspect.

[mdudziec]

OK, thanks for that guys. Think I'll re-check my soldered coil pack connections and go onto a pressure test.

So, I'm looking for between 9 and 10 Bar.

Cheers

[shortsport]

Your basically looking for a big differance on no.2 cylinder

[Knight Rider S4]

http://www.s2forum.com/forum/showthread.php?t=16800

[Greg_S]

Also have you checked the coil to spark plug stub leads which are about 6 inches in length. If these are knackered it could cause an issue

[Knight Rider S4]

Ah, OK.

So you just turn it over, I don't need to start it, do I?

If you can start it with the coil cover off it will be a miracle

[mdudziec]

OK great, I'm gonna feel like a proper mechanic with my own pressure testing thingymebob an all!!

Thanks for all your help, if you have any other suggestions I'm all ears.

[Knight Rider S4]

get a multi meter and check there is power going to injecter on cylinder no2 that is the only other thing that we have not covered