Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[Broomies Mate]

Well that's a relief.

Rain water in the plug-wells on 1-3-5.  All mopped up and she is better.

I think I may have cooked the coil-pack though as still misfiring under heavy load.  I'll give it a day or two to dry out properly under normal driving conditions and then go from there.

Plugs are quads and bloody horrible things, I swear the gaps are too big, and two of them were loose!!!! - I'll put a set of twins in next weekend. 

[chrisgixer]

Seal up the hole around the wiper spindle... And may as well seal the metal lip of the scuttle drain to the scuttle itself whilst there..?

[Broomies Mate]

Seal up the hole around the wiper spindle... And may as well seal the metal lip of the scuttle drain to the scuttle itself whilst there..?

It does seem a prudent course of action.  It's quite easy to see how water can get in the plug-wells and they were full of it! 

[05omegav6]

Sounds like a nice easy fix for a change personally I would fit quads, as I'm not convinced that my saga wasn't related at least in part to the fact that that was the one and only time I fitted twins

Changing them every 20k doesn't give them chance to wear or work loose either, so I don't suffer any long term problems with them

[chrisgixer]

After thought, insure the windscreen seal is firmly clipped onto the bottom edge of the screen. A wiggle/tug of the scuttle will confirm.

Most of my prefered 3.2's have had this problem.

[terry paget]

Random misfire simply means a non specific misfure, ie summat not quite right but not enough to trigger an individual cylinder code...  Is the wire still attached to the ballast resistor?

It lives behind and below the rear multiram valve, bolted to the 246 head.

The wire is brown, but most definitely NOT an earth... damhik   but water from the scuttle corrodes it at the resistor, causing it to fail.
Now I remember where I last met ignition ballast resistors. On coil ignition cars, to give a big spark on starting, the coil was a 9 volt coil, and a resistor and a relay dropped the coil voltage to 9 volts during normal running. I have not heard of one before with electronic ignition.
Solution... new resistor from VX,(2.6 Vectra B ones readily available), take the cable tray cover off and follow the wire into the loom. You'll find it crimped to the main power feed from the ecu to the coil packs... cut it 2" from the crimp, and solder 8" of new wire to it (sealing with either tape or heat shrink tube). Rebuild the plug using tother end and plug into new resistor.

Don't look for the resistor or wire when the ignition is on or the engine is running, as it connects directly to the coilpack feed...

Thanks for that, Al. I had never heard of a ballast resistor in this context. Is there a similar thing on the pre-facelifts? Do all cars have them?

never knew that. always learning.

bought my last bosch coil pack from Vauxhall world parts. Was about £78 delivered me thinks.

[terry paget]

My last post went astray.
I tried to say that I last heard of ignition ballast resistors on my older cars with coil ignition. Some had 9 volt coils to give a big spark while starting, then when running normally coil voltage was dropped to 9 volts with a ballast resistor and a relay to avoid coil overheating. I did not know they were still used in the days of electronic ignition.

[05omegav6]

I might have got the name of it awry but if you follow the single brown wire from the back of the cable tray towards the bulkhead you will find either a plug or a loose wire Where the plug connects is where this...

http://www.omegaowners.com/forum/index.php?topic=109786.msg1376756#msg1376756

...lives

[terry paget]

I might have got the name of it awry but if you follow the single brown wire from the back of the cable tray towards the bulkhead you will find either a plug or a loose wire Where the plug connects is where this...

http://www.omegaowners.com/forum/index.php?topic=109786.msg1376756#msg1376756

...lives

It looks like a radio interference suppression device. Rob G says only fitted on 2.6/3.2, i.e. cars with individual coil packs to each cylinder. I suffered radio interference on a 2.5 last year after replacing faulty plug leads to cure a misfire. The new leads (e-bay sourced) cured the misfire all right, but caused radio interference. I replaced them with leads off  scrapped 3.0 and the fault was cured.

In the 1960s radio interference was a nightmare. We used to put resistors in the HT lead from coil to distributor and chokes into the power lead to the radios. Resistive plug leads came in later on. I imagine on the 2.5 they are resistive. Some plug leads had copper wire running down the middle of them - never failed but caused interference. Modern leads seem to be carbon or silicon track and resistive - no interference but inclined to fail.

[Kevin Wood]

It is indeed a suppression capacitor across the 12V supply to the DBW coil packs.