Does a replacement throttle body require calibrating

Question

One of my Punto's (MK II) is idling erratically. It should sit at approx 750rpm. But it seems to drop to 700rpm (as far as I can tell on the Rev dial) and compensates by increasing to 800+rpm. Not really a major issue as far as I'm aware except it's annoying and was mentioned on my last MOT report. Plus it's probably the early signs of a component failing.

Anyway I have another identical Punto that I'm getting rid of. Can I just swap out the Throttle Body (contains the idler motor)? As I believe this is a common cause of the issue in Punto's. I seem to remember reading that it needs to be calibrated. No mention of this in the Haynes manual though.

If this doesn't fix it any other suggestions? A good time to strip components off the spare car.

BTW thanks for the help all over the last 12 months keeping the Punto that I'm now part-exing on the road against all odds. Much appreciated, but the HG going was just one fault too far.

Regards,

Tim

Tim.. · Accepted Answer

No, in this case it doesnt.Are you sure you dont have any PCV / manifold air leaks?Tim..

Tim · Answer

> No, in this case it doesnt.I had an exhaust manifold air leak when a garage didn't remove one of the old gaskets.  Made a slight whistling noise.  I've not noticed this on the Punto in question.  PCV the cam-cover breather tube?  This had developed a split on the Punto I'm getting shot of.  But I don't remember it causing any idling problems, or noticing any major difference after fixing.  I had inspected this hose recently and it seemed fine.I purchased the Car Mechanics magazine a few months back with a Survival Guide for Puntos.  It seemed to suggest that this was a common issue and is typically fixed by replacing the throttle body.  Not too sure where I got the idea from that it might need calibrating, sure I read it somewhere.Regards,Tim

Tim · Answer

Swapped the Throttle Body and the fault was still there. Worth a try I thought and no obvious visible issues around the manifolds (or whistling). Not sure what else to try, so I'll leave it as is and probably let Fiat look at it if it becomes a bigger issue.

Regards,

Tim

Does a replacement throttle body require calibrating

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