Fiat Scudo misfire on warmup

Honest John Back Room » Technical matters
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Wed 10 Jan 2007 09:06
Fiat Scudo misfire on warmup - Japanese Elvis
I'm having a bit of an issue with the Scudo during warmup.

It's a 1.9d ( 1868 ) non turbo

The van starts ok from cold, and generally runs fine, but when it's partly warm (gauge below 70) it has a 'misfire' at idle speed.

The heater plugs have been changed recently.

The cambelt has been changed recently.

The sender for the temp gauge went faulty (reading overheating when cold) so I replaced that. Next to that sender was another one (green top) and I noticed that when that is disconnected the misfire stops.

I replaced that sender too.

I think the green top sender provides temperature info for engine management, so I'm guessing something in the fuelling changes at around the problem temperature.

Anybody got any ideas what to check next?

What kind of OBD does this have and would it tell me anything?

Thanks
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