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[Dracoro]

Car today, started ok, after a mile or so every time I came to a halt the engine sounded a bit rough and the car was vibrating a little. Kind of a chug-chug sound. Once above 2500rpm it seems fine and runs sort of OK although it doesn't seem 100% "right" but appears to rev/pull reasonably OK. Almost feels like a blowing exhaust but the exhaust all looks OK. After journey there was a faint oily smell but no leaks and no oil in the engine bay that I can see. There also seems to be a little bit more of a "thunk" when when it drops down into a low gear (e.g when pulling into a junction after coming down from 30/40 mph etc.). It's not a big thunk though and all other gear changes up/down all smooth and normal.

Car laid up for 40 minutes then I tried re-starting and it hasn't gone away.

Oil/coolant levels all OK. no overheating etc.

Any ideas?

edit: might be worth mentioning that I had (a few months ago) the rocker gaskets done. Is it possible that that HT leads were damaged (all the time that the RG were leaking into the plug wells) and now eventually failed? How would I test this?

[cem_devecioglu]

if there is no eml light I would check those items at first

* sparks
* fuel filter
* DIS  (my initial estimation) water dropping on DIS damages it..

[Dracoro]

Thanks.
Thanks.

Sparks are quite new.

will look at fuel filter (where is it?)

I noticed the sponge bit under the water tray (above the dis) was very wet (lot of wet weather recently!). May this is causing problems? Do I just remove and clean/dry it out?

[aaronjb]

If the sponge insulation is wet then the DIS pack will almost certainly be getting a nice soaking - IIRC it's the seals along the scuttle edges that you need to check (and, yes, pull it all out and dry it out).

You'll probably find that the DIS pack has started to degrade, and possibly split & rust

[Dracoro]

Thanks.

Presumably the leads will be OK so all I need is the DIS? Are these expensive? (is a DIS effectively a distributer?). I will try drying, cleaning or are they unrepairable?


And yes, it is going dugga dugga dugga dugga

[cem_devecioglu]

check also the leads and sockets etc..

 all I need is the DIS? nope.. first do the checks sometimes problems can be complicated

Are these expensive ? imo not cheap..

is a DIS effectively a distributer ?http://www.aa1car.com/library/dis.htm


are they unrepairable ? have not seen any repaired example..

if there is another miggy owner close to you you can swap and test.. :-/

[Dracoro]

Thanks.

Looks like I need to remove the plenum to be able to check the leads anyway (and the DIS).

DIS seem to be £50/60 or so, does that sound right? VX want ridiculous amounts!

[cem_devecioglu]

Thanks.

Looks like I need to remove the plenum to be able to check the leads anyway (and the DIS).

DIS seem to be £50/60 or so, does that sound right? VX want ridiculous amounts!

130£ here 

[Dracoro]

OK, an update and help required

The DIS is a right bugger to get to, no way of getting it out without removing the plenum and even then I can see it won't be easy. Who designed this crap?!

Anyway. I could remove sparks on the drivers side and sparks 3 and 5 (2 nearest to bulkhead) spark OK when trying to start (took plugs out). Spark 1 would not spark. swapped plugs and no joy so the plugs on that side are OK. So it looks like lead 1 isn't getting a spark.

How can I investigate further? I think I could manage to get a lead from the DIS at plug 1 but would need a new lead from somewhere - will any lead do for this test?

No chance of getting to the plugs on the nearside, again which idiot designed this thing... It's like they've made something that should be simple as tricky as possible. Even if I removed the plenum etc, could I then still do the spark test?

Also, the padding underneath the scuttle was soaked through (trying to dry it) and almost fell off. Do I really need to replace it? What does it actually do?

On the plus side, I managed to unblock the drain hole while I was at it

[dragonlord]

bet its the dis

just had same problem my self passanger side cam gasket went and fryed leads

ripd it apart and fitted new cam gaskets  on both banks and new leads

then its still fooked ad had to put in a new dis pac as well

found the easyest way to get dis pac out i think


undo plenum and move i over to the left

un clip and remove plastic caseing from whiring harness

mover over wires to right

pull leds off diff and get em out of the way
move over as much wireing as you can from dis

theres 4 star bolts holding it in

that the intreting bit i used a flexable driver and got someone to shine a mag lght at so i could see better

while siting on top of engine

get it in out is the hard bit comes out to the left of metal bracket but you have to pull on bracket a touc to give a couple more mils space

bt will only come out one way so  keep rotating it to you find  way it comes out

mine fell apart in my hand i was that fooked

then same un putting new one in

expect plenty of skin mssing from knuckels
right now im off to get oil of me lol

good luck

[cem_devecioglu]

http://www.omegaowners.com/forum/YaBB.pl?num=1155224533

[Dracoro]

That's the guide I tried to follow. The guide doesn't mention removing the plenum but the pics show it's removed.

The DIS isn't in the same place on mine. Mine is sitting horizontally and is further back and down, a real PITA to get to.

I guess I can get any lead that fits for purposes of testing if it's the DIS or the leads? A single cheap lead as it were...

[dragonlord]

yea like mine was as above mine was horizontall and bolted t a horozontal plate with 4 e/star bolts

as above i just shoved penulm off to side

and used a flexable nut driver to undo bolts it does come trust it want as bad as it looked

the hard bit as above was figering out witch way to pull it out gap after geting bolts out

but it dose come out once you find right way

like i said helps as its dark and hard to see having a frind shine in a tourch o you can see bolts better

re leads i got a set for 29 quid from eurocar parts


the amazing bit was after new dis pac and leads and air filter my3l elite is doing 20 to the gallon around town
iv only ever had about 14-15 around town couldent belive it gave me 25% beter fuel consumption

[Dracoro]

Hope it improves my mpg (if the DIS pack is faulty) as I don't get great mpg in town and it's only the 2.5....

What is a flexible nut driver?

[dragonlord]

Hope it improves my mpg (if the DIS pack is faulty) as I don't get great mpg in town and it's only the 2.5....

What is a flexible nut driver?

one of thease

http://www.rapidonline.com/Tools-Fasteners-Production-Equipment/Hand-Tools/Screwdrivers/Long-Reach-Flexible-Hose-Clip-Nut-Driver-Set-4pc/303858/kw/89-3446?source=googleps&utm_source=googleps