E36 328is Crazy high fuel consumption
Discussion
Fault code readers will be next to useless in this situation.
IMHO it needs a lappy and someone in the passenger seat while you drive, while monitoring parameters like lambda readings, MAF readings, fuel pressure, throttle opening etc.
There is plenty of software that will chuck out the data, but interpreting it correctly is another matter.
IMHO it needs a lappy and someone in the passenger seat while you drive, while monitoring parameters like lambda readings, MAF readings, fuel pressure, throttle opening etc.
There is plenty of software that will chuck out the data, but interpreting it correctly is another matter.
Rollcage said:
Fault code readers will be next to useless in this situation.
IMHO it needs a lappy and someone in the passenger seat while you drive, while monitoring parameters like lambda readings, MAF readings, fuel pressure, throttle opening etc.
There is plenty of software that will chuck out the data, but interpreting it correctly is another matter.
Thanks, I guess once I have the data I can ask the interweb to give me lowdown. Will seriously look into getting the cables and software, and a ye olde laptop with serial connection too. IMHO it needs a lappy and someone in the passenger seat while you drive, while monitoring parameters like lambda readings, MAF readings, fuel pressure, throttle opening etc.
There is plenty of software that will chuck out the data, but interpreting it correctly is another matter.
Just to mention, when you re-set the ECU, it re-sets the fuelling adaptions (compensation) where the ECU monitors 'fuel-trims' and adds or removes fuel accordingly. This is why when you first reset it , you're getting better economy until the ECU adapts to the various sensor readings and it goes crap again.
As mentioned, the only way to really diagnose it is road testing datalogging the various sensors and live data and going from there.
Not sure if it's been mentioned, but do you ever monitor the oil level to see if it raises at all? A mate's E36 had a leaking injector and it was diluting the oil.
There has been some great advice all the way through this thread, it's a shame that the fault hasn't been found!
As mentioned, the only way to really diagnose it is road testing datalogging the various sensors and live data and going from there.
Not sure if it's been mentioned, but do you ever monitor the oil level to see if it raises at all? A mate's E36 had a leaking injector and it was diluting the oil.
There has been some great advice all the way through this thread, it's a shame that the fault hasn't been found!
Sorry for not updating, I didn't get the cables in the end but took it to a recommended garage near by who took the car in for three days and were able to diagnose and test a whole host of areas, it was a while back so cant remember the exact details now. Cost me a packet though! In the end they change a part on the fuel line which has a slight crack but didn't show signs of leakage but couldn't be sure as it may have evaporated under the conditions - it didn't make a difference.
I sold the in November a couple days before my birthday, it was sent to Poland for parts.
I sold the in November a couple days before my birthday, it was sent to Poland for parts.
Had the same thing om my Corsa B sport (C14SE), changed everything under the bonnet and the ECU, turned out to be the LAMBDA sensor had broken up inside, fitted a new one and it's now better than it has ever been.
Also my 1987 E30 320i was bad starter, wouldn't clime a hill when cold and fuel was terrible, turned out to be tight valve clearances, not possible if you have hydraulics of course, unless they are sticking or the usual cam oil feed pipe is blocked and the cam is stuffed as my first one was, nearly 2mm of wear, ended up replacing the whole head!
Also my 1987 E30 320i was bad starter, wouldn't clime a hill when cold and fuel was terrible, turned out to be tight valve clearances, not possible if you have hydraulics of course, unless they are sticking or the usual cam oil feed pipe is blocked and the cam is stuffed as my first one was, nearly 2mm of wear, ended up replacing the whole head!
Edited by Ukhozi on Sunday 13th July 13:42
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