Proper values

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Proper values

Postby cacperec » Sun Sep 16, 2018 12:05 am

hi, I've bought brand new Fiat Tipo with 1.6 MultiJet engine (120hp) in January 2018 , and since begining car is acting weird. Main issue is high fuel consumption - basicly it's 6.3 or 5.8 per tank. Car dealer said that everything is fine, but I've bought OBD interface and found some strange (in my opinion) values. It's very hard to find proper values in the internet, so maybe here someone could help me.

Here is what I got:
- on idle (840 rpm, engine started and warm) I've got 0.92 kPa on intake manifold absolute pressure sensor. Isn't it to high? It never goes below it, only get higher if accelerate
- Calculated Engine Load Value shows 30-36% on idle - if AC is on it goes up about 10%. I did compare it to Renault clio and it showed 20-22% on idle. Second strange thing is, it never reaches 100 (clio does) - mostly it stops at 85% when accelerate.
- Absolute pedal position D and E - they show very same value (what's difference between them btw?) - it's 19% if not touching pedal at all, never goes below it - shouldn't it be 0?

I can't find anyone who could verify this values. I've asked 4 mechanics, visited dyno (not sure if it's right word - I mean the place where they checked real engine power - btw it was 132hp which looks odd to me).

Thanks in advance

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Re: Proper values

Postby jtdpow » Sun Sep 16, 2018 11:03 am

i think all its fine,the absolute pressure show this value because its the atmospheric pressure,the other valies are fine because that values its write in the maps lije you see inthe diagnostic,the pedal value are fine too because pedal value are the same in all modes

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Re: Proper values

Postby cacperec » Sun Sep 16, 2018 12:34 pm

so what barometric sensor is for then? Someone replied my question on other forum and said MAP sensor should show 0.45 at idle (becouse of vacuum), and barometric preasure when engine is off or accelerating.In my case it shows 0.92 on idle, and 2.5 when accelerating. I'm getting totally different answers for very same question and getting more and more confused ....

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Re: Proper values

Postby jtdpow » Sun Sep 16, 2018 10:10 pm

i think your car has one map sensor and one barometric sensor....

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Re: Proper values

Postby jurebv » Sun Sep 16, 2018 11:49 pm

you mean 92kpa?

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Re: Proper values

Postby adriancl » Mon Sep 17, 2018 4:51 pm

jurebv wrote:you mean 92kpa?


For sure must be 92kPa, because 0,92kPa mean 0.0092bar, so I assume, diag tool is not good, or user write wrong values on his post.
About engine load, can't compare with other brand,is not relevant.
After Throttle flap, on idle must have values under atm pressure, because is vacuum created behind throttle flap.Anyway, look also on diag about throttle flap opening angle,must have between 5-9deg. at idle.

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