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Old 13th January 2019, 22:33   #11
The Mighty Quinn
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Quote:
Originally Posted by Sheraton View Post
have you checked for any Vacuum leaks at the Manifold ?


do you have a support Bracket/Brace fitted with the VVC Manifold ?



I'm sure a T4 session would determine any fault with the Injectors - are there any traders with T4 in your area ?



Paul.
- Have checked all the vacuum hoses I can find and don't see any problems - they all look to be in good condition (+ I think the misfire comes in before any boost is called upon).

- Not yet fitted, but I do have one and it will be fitted when I get round to doing the mini-overhaul (have a week's hols to take before long).

- Unfortunately not. There was a T4 at a garage a short distance from me but no-one there was qualified to use it on a Rover 75 apparently.. T4's are in extremely short supply over here (and T4 operators, even more so)


I'll keep digging at it anyway.


Cheers,
Karl.

Last edited by The Mighty Quinn; 13th January 2019 at 23:22..
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Old 13th January 2019, 22:39   #12
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Originally Posted by trikey View Post
This is the first I have heard of this problem?!?


Hi Andy,

Yeah, it seems I'm the only one that has encountered this issue

But I think the first two images in my earlier post show the bend in the fuel rail fuel pipe pressing against the body of the alloy inlet manifold - keeping the bolt holes off-centre.

Not that big of an issue in itself - just doesn't look very tidy.


Cheers,
Karl.
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Old 13th January 2019, 22:42   #13
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Had you been having some troubles with the auto box in your car, Richard?

I seem to remember reading that someone changed their auto box ECU on here, recently. Was that yourself? If so, do you mind my asking, does any T4 or other programming need to be done to swap over the gearbox ECU (assuming one has the correct PRO14 version for the 1.8T)? And was the change of any benefit?


Cheers,
Karl.
Hi Karl. Yes that's me. I need to update the thread actually as I've replaced the bottom mount to good effect. Coupled with an ECU reset (pull the fuse for 1/2 hour) the box is better behaved if not as well as I'd like.

The 'box ECU can be swapped without the need for a T4 session. You just have to make sure the replacement is from a car with the same engine to ensure the software is correct for shift patterns etc. The change was initially beneficial but the old traits returned, much like when it would reset the original ECU.
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Old 13th January 2019, 22:54   #14
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How'do Karl

r.e Vacuum Leaks - it may be worth checking the Manifold is sealing properly at both Gaskets the VVC Manifold is a bit heavier and really requires the Support Bracket - this could be causing an issue


Paul.
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Old 13th January 2019, 22:54   #15
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Quote:
Originally Posted by LeRich View Post
Hi Karl. Yes that's me. I need to update the thread actually as I've replaced the bottom mount to good effect. Coupled with an ECU reset (pull the fuse for 1/2 hour) the box is better behaved if not as well as I'd like.

The 'box ECU can be swapped without the need for a T4 session. You just have to make sure the replacement is from a car with the same engine to ensure the software is correct for shift patterns etc. The change was initially beneficial but the old traits returned, much like when it would reset the original ECU.


Thanks for info, Richard.

I'm quite certain that the autobox in my car is in physically good condition, as the oil that had come out previously (last year) looked quite good and the car has never been abused in the 110,000 miles (of 140,000 total) that I've personally completed in it. I have a new old stock ECU for the 1.8T autobox - I'll probably swap them over when I'm doing the solenoid kit swap, which I hope will bestow some better shifting traits to the box.

I'm going to take a good look at all the wiring harnesses in the engine bay too when I'm doing the fuel rail, to see if I can nail down the cause of the misfire..

I hope to report some good news over the next month or two

Fingers crossed


Cheers,
Karl.
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Old 13th January 2019, 22:59   #16
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Have you checked the resistances of the solenoids etc. in the gearbox?
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Old 13th January 2019, 23:03   #17
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Quote:
Originally Posted by Sheraton View Post
How'do Karl

r.e Vacuum Leaks - it may be worth checking the Manifold is sealing properly at both Gaskets the VVC Manifold is a bit heavier and really requires the Support Bracket - this could be causing an issue


Paul.

Thanks Paul.

Yeah, I'll definitely fit the support bracket soon - will see if this makes any difference. No obvious sign of any problems at the manifold gaskets and no coolant leaks there, but the bracket was designed for a reason, I suppose, so fitting certainly can't do any harm.. Will report back any improvements once I get properly stuck back into this thing again


Cheers,
Karl.
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Old 13th January 2019, 23:11   #18
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Quote:
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Have you checked the resistances of the solenoids etc. in the gearbox?

Hi Richard,

Yeah, I'd checked those way back and they were all within tolerances at the time (although the figures since escape me). I'm not convinced that resistance figures will show up all issues that a solenoid might be suffering from, but rather just tell you if it's failed entirely or not..? Might be completely wrong on that - they say a little knowledge is a dangerous (and expensive) thing!

Will fit the new solenoid kit and gasket when doing the mini-overhaul. If after all that, there's still no joy, then I'll probably just retire the car. No mechanics here have any interest in diagnostics work, unfortunately


Cheers,
Karl.
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Old 14th January 2019, 22:27   #19
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Could easily be one duff plug failing under pressure in the combustion chamber.
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Old 16th January 2019, 20:27   #20
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Could easily be one duff plug failing under pressure in the combustion chamber.
Thanks JD.

I changed all the ignition components (inc. plugs) some time ago, to little effect. But I will check and change again (as needed) shortly.

Plugs looked decent when I checked them the last time - see attached (these pics were taken some time last year, or possibly the year before )


Cheers,
Karl.
Attached Images
File Type: jpg SPARK PLUG 1.jpg (125.6 KB, 7 views)
File Type: jpg SPARK PLUG 2.jpg (72.4 KB, 7 views)
File Type: jpg SPARK PLUG 3.jpg (72.2 KB, 7 views)
File Type: jpg SPARK PLUG 4.jpg (73.7 KB, 6 views)
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