XSeries-forum

So, plugged in the c110 and max charge pressure I saw was 2400ish, with a rolling start and foot to floor up to about 60mph.

Is this normal, or low? What do you folks see?

As an aside, my fuel pressure shot up to circa 1200, so fuel pressure seems ok (except can't find any normal range for that either!)

Anyone got a c110 handy? Really want to know if I'm low or not as next step digs getting costly!

[quote="Upex"]
Anyone got a c110 handy? Really want to know if I'm low or not as next step digs getting costly!
[/quote]
Sorry I've only got Carley app, but if anyone knows if this is an option for Carly, I'm more than willing to help out.
Mines an E83 X3 though, but the same engine as the E53 3.0d

Thanks horizon. Never seen our used carley, so not sure it it tells you or not. Do you have ambient pressure as the c110 charge pressure is after that lol

Just had my Carly app hooked up to the car, it hasn't got charge pressure listed but boost pressure setpoint, when at idle it reads 1076 hpa and when under load with the foot buried in the carpet 2500
The raw value of the rail pressure is 1138.21 bar at idle, rising to nearly 4000 Bar when under full load.
Massive differnce in fuel pressure,
Edit
Through a little reading on the net 4000 bar seems excessive as Euro 6 cars are 3000 bar, I will have to do a retest and see if I can capture the readings with a passenger either taking a photo or a screed shot.
So until then don't take my findings too seriously

Those figures don't look too far off.  1076HPa is 1.07Bar (slightly above atmospheric pressure) at idle and 2.5Bar under power with the turbo spooled up.  That's ~1.5 bar of boost.  UK Surface pressure is between 1016 and 1023HPa today.

Euro 6 cars may have a lower rail pressure than Euro 3 cars too - in order to meet the tighter emissions rules - and it may also depend upon the tune for that engine in that model.  Happy to be educated differently though 

I was looking on the Carly web site under parameters and it's says that some " Values " seen in Parameters may seem implausible, as they can be what is used for a calculation for the ECU. So is probably not a true pressure reading,
We use a control system at work that alters a true pressure transducer reading ( and lies to the individual machines ) to manipulate which machines run at certain speeds, confuses the hell out of customers.

I do that with the wife all the time....... O:-)

Thanks horizon, appreciate you taking the time to test and report back.

From your carley figures, I'd say I'm broadly inline with the pressures, just above atmospheric at idle and  2400 ish vs your 2500, so seems ok.

Fuel pressure wise though, appears I'm way off. At idle I'm showing 300-320bar, whereas you have 1000+, so even though you caveat your readings, were miles out from each other, so unless your 4000 is 1000% to Mich, perhaps I have fuel pressure issues?

Fuel filter is new, but what came out the old one shocked me, was used oil black for the latter half (first half was clean, then turned black, and just dripped out in the flow direction, but poored out in reverse).

Where do I start with confirming fuel pressure is pants, and is it right that it'd throw no codes that bmw scanner and pa soft could detect?

I'll try to get another run in her and reconfirm fuel readings. Hard to do with the tiny screen and driving lol.

Cheers

Cheers all

Don t take my fuel pressure readings as being correct. After a bit of reading it seems we have the third generation system. It seems that pressures of 350-400 at idle rising to 1600 - 1800 bar at high load/ acceleration is the quoted figures.
Which show my figures as being way out, as said on Carly's site it is a value and may just be a figure / calculation used by the ECU.
So your not  as far out as first suspected.

Thanks horizon.

Where did you find the stats, I've been looking for weeks lol. Clearly need to work on my googling skills!

Thanks for following up, will draw a line under that one, or rather these 2 for now... But means I'm even more stuck now lol

http://www.yildiz.edu.tr/~sandalci/ders ... aining.pdf
This isn't the article I first found but is relative to pressure.
Also found an article on Impa, which showed live data of charge air pressure and rail pressure etc.
https://www.google.co.uk/url?sa=t&sourc ... 18BVqEOjIg
Pity I didn't show the range when the car was under load.

Thanks horizon, no idea how you found it, or if our systems the same as in the briefing doc, but interesting read and would appear to indicate my fuel pressures are ok.

Will do a leak back test when kit arrives, in case pressure good but an injector blocked Tec, but think unlikely as my idle rock steady (best idling car I've ever had lol).

Just means I'm back to now clue as to what the issue is. Guess I need to get Insta working and see if that can show anything that the bmw 1.4.0 and pa soft or the c110 can't see.

Anyone know what the Insta cable looks like, have loads of them and not a clue which one is which lol.

Cheers horizon, appreciated.