GTA V6 - Idle Misfire + Monitor Control Sys. Failure After T.Belt Change - Alfa Romeo Forum
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(Post Link) post #1 of 4 Old 05-08-11 Thread Starter
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GTA V6 - Idle Misfire + Monitor Control Sys. Failure After T.Belt Change

Hi guys,
Took my immaculate, perfect-running 29,000 mile 147 GTA in for a timing belt change on Monday. Its a 2004 so was overdue a belt on a time-based interval.

Belt, tensioner, pulleys changed - even got the correct cam lockers from EB Spares for the mechanic to use. Also new plugs fitted.

Got the call "your car's ready", and when I got there it was parked ticking over. As soon as I opened the door I heard it grumbling and misfiring like a pig. Tailpipes were jumping back and forth, engine jiggling violently on its mounts. Also, 'monitor control system failure' was up on the dash pod. Plugging it in revealed 'random multiple misfire' cylinders 1/3/5 (or 1,2,3 - it was all one bank anyway)

Long story short, I left and politely asked them not to phone until it was as perfect as it was when I left it.

A day later and they said the timing was out half a tooth causing the poor idle, and it was ready to collect.

Although now much better, the idle was much rougher than it was prior to the car being worked on, on the the test drive it felt down on power (and the exhaust stunk of catalytic converter).

Sensing I was getting nowhere, I paid up and said I would take it to an Alfa specialist to which they eventually agreed to subsidise.

By the time I'd got home in the car, monitor control system failure was back, the idle was still rough and was still slightly down on grunt.

The car has been at the specialist today (I will keep them anonymous for the time being - they are doing everything they can to sort it), and they confirmed the timing to be bang on, and said they wouid proceed to do a compression test, as all the coil packs and wiring seemed to be in order.

So I'm sure you can appreciate how well and truly gutted I am that my baby has been unnecessarily buggered up, for the sake of a non-critical t.belt change (the belt that came off was in as good a condition as the new one)

Any help/suggestions as to the culprit will be very much appreciated

Cheers
Ben
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Damien_C
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No offence but take it to a person who knows Alfa's from now on. This is one of the reasons why I wouldn't take an Alfa esp a V6 without the person working on them having experience working on them. The V6's are a pig to time due to the quad cam layout and it's normally the back cam's are miss timed Sorry to hear of the issues that is a diaster.
 
(Post Link) post #3 of 4 Old 08-08-11 Thread Starter
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Originally Posted by Damien_C View Post
No offence but take it to a person who knows Alfa's from now on. This is one of the reasons why I wouldn't take an Alfa esp a V6 without the person working on them having experience working on them. The V6's are a pig to time due to the quad cam layout and it's normally the back cam's are miss timed Sorry to hear of the issues that is a diaster.
Yep you are absolutely correct - it'll never go to a general independant again for as long as I own it!

-Ben
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An Alfa specialist would certainly help improve your chances of having a decent job done, but really, any competent mechanic should be able to do the job. After all, I did mine OK and I'm 100% amateur as far as mechanicing goes.

Just needs a few special tools and a decent dose of due diligence.

Any mechanic that's prepared to present a car as 'done' in the state you describe, doesn't deserve the title IMO.

Hope it's not an expensive fix.
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