Mitch C

iTrader: (1)

Right, I've changed the oil and plugs, taking my time and doing it all as per "the list", apart from disconnecting the Cam or crank sensor because they look like bolt in parts (ABS sensor type) on my engine which don't look like the ones in the pics I've seen, and wasn't sure if they'd affect any adjustment at all.

Anyway, the car is now running like a bag of nails. It is idling at 1000rpm, though very roughly with the engine shaking. The boost gauge is showing no boost, though still shows when it has a depression, when I tried to drive it. Is it possible to "miss" a plug with the coil pack whilst bolting it back on? (Not that that would affect the boost)

Is there a boost valve that I could check, or would you suggest taking the plugs out and refitting them? I double checked and the gaps were 0.7mm. The oil level isn't too high, and there doesn't seem to be any loose connections or hoses. The t piece that the boost gauge was bodged in by the previous owner was snapped, so i had to rotate it, but I don't think it is leaking at all.

Cheers for any help.

Mitch

Mitch C

iTrader: (1)

Just found the coilpacks are a bit fragile, could it be one of them?

Is anything simple and rugged enough to stand up to normal servicing on this engine, or is it just me and me comedy sausage fingers?

Any help before you lot go off to play at Trax would be greatly appreciated

Delboy2

If they are damaged or cracked in any way its is likely that is causing the problem. Removing them to replace the plugs has possibly disturbed and weakened them.

Cheers

Mitch C

iTrader: (1)

What's the best way to test them? When I say I found them fragile, I mean by doing a search, not that mine are fragile. (Though I guess they are.....)

Thanks Delboy2

Delboy2

In the area where the coilpack would contact the plug there is a rubber shroud - make sure there is no damage to the insulation under and around the 'shroud' There is also a slight possibility that maybe one or more of the new plugs are faulty...

Cheers

Mitch C

iTrader: (1)

Is it okay to use the spark plug testers that you place between plug and coilpack? That should show if it's working or not, as long as there's enough room to fit it on.

I'm just lucky it's so easy to get at the plugs

Mitch C

iTrader: (1)

Oh, and how would the coilpacks affect the lack of boost?

Delboy2

If a coil pack/s is faulty this becomes much more apparent under boost conditions as a much stronger spark is required to produce even combustion normally resulting in the car 'bucking' under boost - the bucking is caused by the fuel air mixture not burning which will result in a loss of exhaust gas velocity causing the turbo's turbine speed to reduce - decreasing boost.
I don't know how tbh how you will get a spark plug tester in there and secure to coilpack??

Cheers

AlanG

Did you put the leads back on in the correct position?

Sounds obvious i know, but....

Mitch C

iTrader: (1)

Yes mate, I did

UPDATE: 2 dead coilpacks. Tried everything, ie swapping them over and changing plugs across etc, and the left front and rear right have gone.

I put two good ones on the right side so I could fit my filter back on, and left the other two til some nice person sells me some more.

Do these two go regularly because the wires are stretched, or is there another reason for it?

Mitch C

iTrader: (1)

Got new coilpacks, and the job's a fish.

Thanks for the suggestions, guys.