Technical 1.4 8V (56) cold start issues(water temp related)

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Technical 1.4 8V (56) cold start issues(water temp related)

no choice, needs software update and MAP sensor.
Thanks T for this definitive and authoritative statement. I take it then that it is the MAP sensor that is likely to have suddenly failed in the last few days and caused the cold start problem? And that it's nothing to do with the water temperature sensor, despite the red herring alert and the temperature gauge behaviour?

I shall get it booked into the dealer asap now. Can you hazard a guess at the bill I'll get?

There are 2 sensors on the inlet manifold. When I google the Bosch part numbers these two links result:-
http://forum.civinco.se/viewtopic.php?f=36&t=66
http://forum.civinco.se/viewtopic.php?f=36&t=68
On that website they are both described as MAP sensors and have a similar spec, of pressure v. voltage. But when they are removed they look very different from each other. To my untrained eye the the former looks like a pressure sensor whereas the latter looks more like a flow or temperature sensor (it has a miniature resistor/thermistor-like component positioned as if to be in the airflow).

The latter, which fits in the side of the manifold, was a bit contaminated with a water-in-oil type of gunge (orange colour). So I cleaned it up and also the orifice in which it fits, thinking that might make a difference, but it didn't.

Are you able to advise which of these two sensors is commonly the cause of this cold start problem please?

Is it normal to find a bit of said gunge in the inlet manifold on this car? It usually gets a decent run each day (12 miles each way) so I was slightly surprised to see any of it. My breather hose has been taped up by my garage (they did tell me) and has collapsed a bit, so maybe that's the reason. I'll get that done by the dealer at the same time while it's in.


Cheers
 
if software update is unavailable you will need a ECU to cure the temp warning, if you want of course. Voltage can and often does play a part in this.

I would advise monitoring the cars parameters (air/water temp etc) before splashing out on a MAP sensor or better still get one from scrapyard/lend of one from a friends car (its the 'L' shaped sensor held on by a torx 25 single screw)
 
if software update is unavailable you will need a ECU to cure the temp warning, if you want of course. Voltage can and often does play a part in this.

I would advise monitoring the cars parameters (air/water temp etc) before splashing out on a MAP sensor or better still get one from scrapyard/lend of one from a friends car (its the 'L' shaped sensor held on by a torx 25 single screw)

Have managed fine for a long time with the red herring temp warning so not too bothered about that. Bet it goes away if I ever have to get a new battery.

Now then.......Tee Hee! Just bagged a used 0 261 230 030 sensor off Ebay for £9.95 + postage, worth a risk I think.

For those interested this link that I have subsequently found is an Aussie Bosch catalogue page describing both sensors (scroll to page 34):- http://apps.bosch.com.au/motorsport/downloads/sensors_mappressure.pdf

They are both pressure sensors but the 030 one also has an integral temperature sensor, so I would have been inclined to go for that one first anyway, before your confirmation above.

Ta muchly T and others for all the help, will let you know how I get on later on in the week.


Update:-
Thought this was interesting from the Bosch page linked above:-
Installation information
The sensor is designed for mounting on a horizontal surface of the vehicle’s intake
manifold. .....................By correct mounting in the vehicle (pressure-monitoring point on the
top at the intake manifold, pressure fitting pointing downwards etc.) it is to be en-
sured that condensate does not collect in the pressure cell.

Is this a wonderful piece of Fiat design that takes no notice of the sensor manufacturer's recommendations? (The sensor is mounted vertically on the side of the inlet manifold).
 
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Update:
Turns out the guy selling the used sensor on Ebay lived quite near, so I collected it instead of waiting for the post.

Five minutes to fit it, a few hours waiting for the engine to cool down and then Yeyyyyyy!!! :) :D the car cold starts again perfectly.

It's back to normal, the errant overtemp alert is still there and the temp gauge goes all over the place at startup as usual, but I'll fix them, well........................later ;)

So fixed it for under £10. One of my better DIY efforts thanks also to advice received here.

What a great forum this is! (y)

For anyone who has a similar problem and can't find a used sensor, I noticed that shop4parts have 40% off this http://www.shop4parts.co.uk/?name=store&op=Details&ProdID=3251&sku=7832 at the moment (but it's still over £50 with VAT and postage)

Now to order a new breather hose.........

Cheers
 
I have recently experience the warning "excess radiator fluid temp" on my GP even when cold.

This is caused by a system drop in voltage, this drop in voltage is how the radiator temp sensor is run. The higher the raid temp the lower the voltage across the sensor therefore the above warning appears, even when the engine is cold.

The problem was the drip tray for the windscreen drips directly into the alternator. Subsequently the alternator failed then seized and broke.

I replaced the alternator then the battery as the charge was below 4volts so a cell had gone.

Thus has fixed the problem and I have had no more issues with this warning.
 
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