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Discussion Starter #1
Hi guys
my V6 ph 2 failed on the idle emissions, the car runs fine but something is obviously amiss. It has the fly-by-wire unit and I'm wondering if the unit needs a reset or whether the butterfly is not operating correctly and could be over-fueling. High rev emissions were fine. Any ideas suggestions please.
 

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Hi,
I have the same issue (high emissions/borderline pass) with mine and have tried the ECU reset however, I have since found out that the one of the 4 cam-locks I used when I replaced the timing belt is cr$p. One of them is machined incorrectly. I will re-time the cam prior to the next MOT in the spring and hope this cures the problem...

Hope you're luckier than I am with the reset...

Jim
 

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Where were your cam locks from? I have just used a set, doing my belt, so hope they were good ones !

Mine are from Totally Alfa, who I trust, so I assume they’re ok...
 

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Ebay:cautious:. You can see that they are differently machined as matching them as a pair reveals the lack of symmetry. Regardless of the cam position, it will not sit flush as per the other three. The TotallyAlfa ones should be good based on my previous purchases from them...
 

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Discussion Starter #7
Hi,
I have the same issue (high emissions/borderline pass) with mine and have tried the ECU reset however, I have since found out that the one of the 4 cam-locks I used when I replaced the timing belt is cr$p. One of them is machined incorrectly. I will re-time the cam prior to the next MOT in the spring and hope this cures the problem...

Hope you're luckier than I am with the reset...

Jim
When the belts were changed it was at a Alfa specialist indy. They would have the right tools. The emisions at high revs were fine it's just the idle emissions which are way out.
 

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Discussion Starter #8
Can you remove the V6 throttle body and clean it. I've heard something about not moving the butterfly on V6's. I can't find a how to?
 

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Can you remove the V6 throttle body and clean it. I've heard something about not moving the butterfly on V6's. I can't find a how to?
Yes you can.... There are a lot of scary stories circulating about damaging the throttle, however, I (and others) have done it numerous times without any problems what-so-ever.....
You just need to be carefull/sensible, the butterfly valve gears are usually nylon, so just be carefull opening and closing the butterfly by hand against the spring tension

an example:
cleaning throttle body.pdf
 

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Yes you can.... There are a lot of scary stories circulating about damaging the throttle, however, I (and others) have done it numerous times without any problems what-so-ever.....
You just need to be carefull/sensible, the butterfly valve gears are usually nylon, so just be carefull opening and closing the butterfly by hand against the spring tension

an example:
cleaning throttle body.pdf
Absolutely marvellous with photos. I can't thank you enough. I did a search a bit earlier and found some helpful posts today but yours is the best. I'll do the re-set after cleaning. 👏👍😊
 
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