Not running on 8 Cylinders?

[Erich Stahler]

I have just replaced the coil packs, though before I saw this diagram I mounted them both with the ecu connector in the same plane,instead of offset. When I stared her up there were some mighty big bangs, have since moved them round so they are offset as in the diagram and replaced the leads, everything is in the correct order and and alignment as in the diagram but now it runs like not all 8 firing?

Wondering if when I started it the first time with one of the coil packs the wrong way round damaged it? is there a way I can test the coil packs and firing order without removing them all over again?

[pmessling]

Check that you have the leads correct and that they are all pushed in right. Have you replaced the leads at all?

[Vee8ight]

You won't damage a coil pack from connecting the HT leads up wrong.

The coil packs are wasted spark, it fires a pair of leads at a time.

If you are sure that you are not firing on all cylinders, pull one lead at a time till you find the dodgy lead/plug, but bear in mind that the coil pack needs both leads to make a circuit.

[Jimbolian]

Recently did mine, had to trace all the leads and a pair where on the wrong cylinders. Easily done! Diagram is the same I used.

Mind you I also forgot to plug the ECU back in the first time I tried starting up... so I may just be very blonde.

[Erich Stahler]

I have checked the leads, which are new and they are all definitely in the correct order and seated. I even re-installed the old coil packs to test if the new ones were faulty and they aren't so really starting to wonder if one of the plugs is fouled up or burnt out, failing that there could be a problem in the electrics?

[gruffalo]

What leads are you using, a common problem is a misfire when using magnacore leads, the originals are best.

Also have you checked the leads with a mega as they sometimes breakdown at the high voltages needed for the spark but seem OK when tested with a multimeter?

[wiggycerb]

Have you checked voltage from alternator, worth checking all the wires on the back are on correctly and that the exciter feed is working, also check earths.

When my alternator failed it caused miss-firing as the car started to try and run from battery power ... just an idea.

Hope you get it solved.