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ducatipaso.org :: View topic - Cold start
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Cold start
http://ducatipaso.org/forum/viewtopic.php?f=3&t=7831		 Page 1 of 2
Author:  Moses [ Wed Nov 08, 2017 5:25 am ]
Post subject:  Cold start
Hi guys, I previously posted about my 907 smoking, that seems to have improved with the replacement of a split valve seal, but I'm having trouble with cold starting, it initially fires then dies, I have to give it 3/4 or more on the cold start control and crank it for a while to eventually fire up, then it runs rough, blows black smoke, seems to be over fuelling until it finally clears. It's recently had the settings etc set by a guy who knows his stuff but a bit perplexed as where to head to next. Any thoughts?
Author:  Derek [ Wed Nov 08, 2017 9:41 am ]
Post subject:  Re: Cold start
The cold start mixture is set by the ECU using the outputs it gets from the water temperature and air temperature sensors. It is possible the water temperature sensor is faulty.
However I'm more inclined to think that the throttle bodies and TPS are not set up correctly. The TPS setting in particular is crucial for an engine to start easily and run well. You can get the correct procedure from Brad Black's website :
Author:  Moses [ Wed Nov 08, 2017 5:49 pm ]
Post subject:  Re: Cold start
Thanks for the info, I'll get to work on your suggestions. If the water temp sensor is faulty, would it be giving a false reading to the temp gauge, that seems to be working fine?

Cheers
Author:  Bluey [ Thu Nov 09, 2017 6:50 am ]
Post subject:  Re: Cold start
Author:  Derek [ Thu Nov 09, 2017 10:07 am ]
Post subject:  Re: Cold start
Author:  Tamburinifan [ Thu Nov 09, 2017 2:35 pm ]
Post subject:  Re: Cold start
If a sensor is faulty, the ECU goes into Limp-home map.
It gives more fuel allover.
When driving, is it normal or signs of running fat, excessive exhaust smoke, if so, blue or black??
Author:  Moses [ Thu Nov 09, 2017 5:55 pm ]
Post subject:  Re: Cold start
When starting from cold or even after being switched off for a short time, it will immediately fire up smoothly but will cut out out, then it needs throttle and cranking to get going again, it will then run rough and blow some black smoke indicative of over fuelling until it smooths out and runs smooth. During normal running it goes fine and doesn't blow smoke.
Author:  Tamburinifan [ Thu Nov 09, 2017 9:09 pm ]
Post subject:  Re: Cold start
Author:  Moses [ Fri Nov 10, 2017 2:16 am ]
Post subject:  Re: Cold start
He went right through the settings, trim, tips etc, was running well but this problem which was intermittent has become more consistent. Occasionally it starts fine with no problem, although it's been a while since it did that.
Only smoking at the initial start up. If I pull over while riding and switch off, it will start fine immediately but if I wait say 10-15 minutes, I'll most likely have problems when I start, although not every time.
Author:  Tamburinifan [ Fri Nov 10, 2017 11:51 am ]
Post subject:  Re: Cold start
If valves and all injection settings are good, l'd check ignition.
Try a set of fresh plugs, then try another set of coils.
Did he set the CO as well?
A quick test if it's runnin a bit fat is to open both air screws on the
throttlebodies 1/5 of a turn and see what happends.
Make sure you can return them to previous position exactly.
Author:  Derek [ Fri Nov 10, 2017 4:09 pm ]
Post subject:  Re: Cold start
Author:  Moses [ Fri Nov 10, 2017 5:11 pm ]
Post subject:  Re: Cold start
Thanks for the input, the co was done, my gut feeling is the settings are fine but either a connection or a sensor is playing up, I'm currently going over all the connectors I can find and will look at temp sensor, possibly replace.
Author:  Moses [ Mon Nov 13, 2017 5:35 pm ]
Post subject:  Re: Cold start
Hi Derek, I can't get anywhere with the fiat people here in NZ as the numbers You quote don't register, do you have any other info, it seems they also need a chassis no to open up the system, doesn't make sense to me, I thought they could go into a parts file etc.
Tried Ducati but they no longer make it.

Cheers

Steve
Author:  Mc tool [ Mon Nov 13, 2017 6:59 pm ]
Post subject:  Re: Cold start
Try ebay. I have found that Kiwi parts people are as helpful as hell if all they have to do is find a part # but ask them for an oil pressure sender 10x1mm tapered thread , 7lb's cracking , 6.3mm spade terminal, and they look at you like your mad. It can be #uckin frustrating knowing the dumb arses probly have the part but are just to stupid to know it. I sometimes use ebay as a source of info , often you can get the correct part no or description and what else it fits ,and the pix can help too as you can often read the writing on the part in the pic .

https://www.ebay.com/itm/Fiat-Punto-Coo ... Tn&vxp=mtr
This may be the right one :)
Author:  Andrew2 [ Tue Nov 14, 2017 5:10 am ]
Post subject:  Re: Cold start
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