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Old 14-11-2017   #16
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Re: Fiat Bravo Problems wit first starting the engine

Quote Originally Posted by MikeG20 View Post
Fuel pump?
i tested that as well.
Tested, replaced etc
Not the problem.
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Old 18-11-2017   #17
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Re: Fiat Bravo Problems wit first starting the engine

I know you mentioned you replaced temperature sensors, but just to be sure. There are two MAP sensors, one at the turbo and one at the intake on the right side. Only the second one has the temperature sensor inside. It is page 58 (at turbo) and 55 (right side) in the Fiat_NuovaBravo_1.4TjetEngine.pdf.

BOSCH 0 261 230 042 is original sensor, later replaced by 0261230302, which is equivalent of F01C600085, which is almost 50% cheaper.
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Old 18-11-2017   #18
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Re: Fiat Bravo Problems wit first starting the engine

Quote Originally Posted by Perfezionista View Post
I know you mentioned you replaced temperature sensors, but just to be sure. There are two MAP sensors, one at the turbo and one at the intake on the right side. Only the second one has the temperature sensor inside. It is page 58 (at turbo) and 55 (right side) in the Fiat_NuovaBravo_1.4TjetEngine.pdf.

BOSCH 0 261 230 042 is original sensor, later replaced by 0261230302, which is equivalent of F01C600085, which is almost 50% cheaper.
Yep, i know, replaced them as well, just to make sure, even tho they can easily be rad and interpreted as working on MES
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Old 18-12-2017   #19
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Re: Fiat Bravo Problems wit first starting the engine

Quote Originally Posted by Perfezionista View Post
Very interesting. What are your DTV and FRA values for LPG and petrol?

So yesterday i was out at the car playing with the interfaces (set the petrol to LPG changeover a little lower now at 45 degrees vs 55 degrees as i had it in the summer)

Sadly I cannot give you the DTV /FRA values, because for some reason my elm is not working (might be the drivers+windows10 combo).

What i can tell you is what i saw using Torque (although not great):
-STFT was at around 3% on petrol and lpg both at idle and when cruising
-O2 correction (what i assumed was some sort of LTFT) was also around 3% in all cases.

I made sure it was in Closed Loop.
The STF did vary when changing over.. but i assume that is because some extra fuel is being delivered for a few seconds, until the petrol wetting the intake walls evaporates.


So in my opinion the LPG was set correctly.

Now tell me if i have this wrong:
-i lowered the Iddle LPG and to get it at ~+10%STFT (basically a little lean until the ECU compensates).. this should make it pump 10% more petrol on cold starts...until it goes into closed loop.
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Old 18-12-2017   #20
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Re: Fiat Bravo Problems wit first starting the engine

Another quick update.. it's been -1 degrees today... so after more that 24 hours since i last started the car.
Turned the key.. left it for 3-4 seconds to pressurize the system, then crank, it cought and started on the engines..send revolution.... really fast.

BUT i did also put in new petrol .... so probably a combined effort

I will come back in 3-5 days ... or whenever it goes bad again
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Old 25-12-2017   #21
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Re: Fiat Bravo Problems wit first starting the engine

Interesting. I always have 1/2-3/4 tank level od petrol, that is cca 30-40 litres. Every month i put cca 10 litres of fresh 100 octane petrol.
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