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[Marks DTM Calib]

Yep.....makes assembly and wiring much simpler

[theolodian]

Yep.....makes assembly and wiring much simpler

Only slightly.  Tradeoffs are more complicated/expensive parts and repair.

[Marks DTM Calib]

Easier to repair to.....when one coil fails on single setups, the other 3/5/7/11 are normaly not far behind.

[theolodian]

Easier to repair to.....when one coil fails on single setups, the other 3/5/7/11 are normaly not far behind.

Yes they all go, but easier to diagnose b/c you can move the coil and see if the fault code follows.  Single coils I have done are dead easy to replace, just snap in.  One coil type can fit 4/6/8 cyl etc.

[Rock]

Latest update....

Read the codes on the car and i had...

Random / Multiple Cylinder Misfires
Cyl 2 Misfires
Cyl 3 Misfires
Cyl 4 Misfires
Cyl 6 Misfires

I cleared the codes from the system, and then did my best to run the car for a while. It would run for about 20 seconds before dying so ran it 3 times like this.

Read codes again but none were found.

Would it have been running long enough to generate new codes if there were any?

If not, i'm kind of thinking that maybe the source of the problem is fixed (by replacing the coil pack on bank 2), and that by replacing the cat, i would hopefully have a healthy car again?

[TheBoy]

When running, does it run ok before running out of breath? Does either EML or emmision light come on whilst running?

I think you are gonna have to drop the cat off to check if blocked though....

[Rock]

When it first starts up, it sounds perfect for about a second or 2, but then quickly starts stuttering.

Not sure about the lights, and my battery is now dead so i will let you know a bit later...

Will try to get the cat off later, or tomorrow.

[omegaV6CD]

When it first starts up, it sounds perfect for about a second or 2, but then quickly starts stuttering.

Not sure about the lights, and my battery is now dead so i will let you know a bit later...

Will try to get the cat off later, or tomorrow.

Get a pressure reader and by using an adaptor on the lamda sensor threads try and read the backpressure in the cats with the engine running so that you can get an indication if the cats are knackered. Also get a sparkplug tester and check each coilpack. You don't need to get the cat off by the way.

[Rock]

Ok, strange development...

Got my car towed to my local trusted independant garage. They have done some checks on the car (lambda sensors i think) and they think the cats are fine.

They have, however, said that they think coil pack 1 needs replacing. I have obviously told them the history but they insist its an issue.

If the cats are fine, and assuming its not just the coil packs at fault, what else might cause the mis-firing?

Are there any leads, hoses, vacuum pipes, connectors that might have come un-done (or inadvertantly been undone by me) that could cause this?

[Rock]

If only.......

Saw this on ebay!

[omegaV6CD]

Ok, strange development...

Got my car towed to my local trusted independant garage. They have done some checks on the car (lambda sensors i think) and they think the cats are fine.

They have, however, said that they think coil pack 1 needs replacing. I have obviously told them the history but they insist its an issue.

If the cats are fine, and assuming its not just the coil packs at fault, what else might cause the mis-firing?

Are there any leads, hoses, vacuum pipes, connectors that might have come un-done (or inadvertantly been undone by me) that could cause this?

Is there enough pressure in the fuel rail?

[Rock]

Sorry for sounding dumb, but how would you check that?

[Marks DTM Calib]

Starting from scratch, what exactly did you remove when cleaning the throttle assembly?

[Rock]

When removing the throttle body i did the following...

Un-clipped the 2 connectors on the bagpipes.
removed 2 thin hoses
Removed bagpipes.
removed the 3 hoses connected to the throttle body (2 with circlips and one small push-on one underneath)
un-clipped the connector to the dbw throttle
removed 4 torx bolts
removed throttle body
cleaned and replaced.
I have checked all of the above but am worried that i may have knocked something else while doing this...

Ooooh, just remembered something else i did!

Before i realised the belt in my cambelt kit had no markings on it, i started to remove the plenum. Would there have been something at the rear of the plenum i might have inadvertantly pulled out?

[Rock]

Just thought i'd post an update...

Garage have so far done the following:

Replaced coil pack 1
Tried a replacement crank sensor
Tried a new throttle switch
Ruled out CAT by removing / checking Lambda sensors (not sure how this works)

So far no joy and still running awful.

They also say they have found a big list of fault codes stored against the transmission.

Hoping to have some positive feedback from them tomorrow. Getting disillusioned with the car now.