E36 328is Crazy high fuel consumption
Discussion
Afternoon.
Unfortunately no I havent, and still havent got around to changing O2 sensors either due to pressures of work mainly. Also have been driving another car to save a bit of money and frustration, but a plan is a foot to get around to changing O2 sensors sometime in the summer while the weather remains dry-ish.
Will update accordingly!
Unfortunately no I havent, and still havent got around to changing O2 sensors either due to pressures of work mainly. Also have been driving another car to save a bit of money and frustration, but a plan is a foot to get around to changing O2 sensors sometime in the summer while the weather remains dry-ish.
Will update accordingly!
rumple said:
OP I had the O2 sensors go on a 328 I owned, got to be honest it made very little difference to the fuel consumption
Thanks for the heads up, besides those I am all out of options and really dont fancy an engine change. I'll give a go nevertheless, that way I know i've done everything i could try andwont have a niggling voice suggesting O2 sensors. Hi guys just a bit of info for you two thing you want to look is the cam shaft breather vavle and pipes and also look at the temp of the bottom rad hose i had the same prob and it turned out to been both of them conbined but the thing that through ever one that i asked was the car was not overheating but there turned out to be an air lock in the rad and the car was reading nornal temp all the time
Doesn't sound like lambda sensors, as the emissions would likely not pass MOT standards.
I still think it's somehow speed related - like on old Ford Kas. Over rev massively at a standstill or in gear, unplug speed sensor and no problem. Makes driving them interesting until the sensor is unplugged!
I still think it's somehow speed related - like on old Ford Kas. Over rev massively at a standstill or in gear, unplug speed sensor and no problem. Makes driving them interesting until the sensor is unplugged!
all22 said:
Hi guys just a bit of info for you two thing you want to look is the cam shaft breather vavle and pipes and also look at the temp of the bottom rad hose i had the same prob and it turned out to been both of them conbined but the thing that through ever one that i asked was the car was not overheating but there turned out to be an air lock in the rad and the car was reading nornal temp all the time
Thanks for that, its something I could look into. Do you have any idea what the ideal temp should be for the rad hose? What should I look out for on the cam shaft breather valve, bad fitting from wearing?Edited by OptiManc on Monday 27th August 15:18
Rollcage said:
Doesn't sound like lambda sensors, as the emissions would likely not pass MOT standards.
I still think it's somehow speed related - like on old Ford Kas. Over rev massively at a standstill or in gear, unplug speed sensor and no problem. Makes driving them interesting until the sensor is unplugged!
I had a similar problem like this when I first got it, a scary moment in particular when approaching a roundabout junction 21 on the M62. I'd brake but the car wouldn’t respond much to the braking and continue accelerating towards the roundabout! - turned out to be the floor mats resting on the accelerator?! Managed to stop it by throwing it into neutral. I still think it's somehow speed related - like on old Ford Kas. Over rev massively at a standstill or in gear, unplug speed sensor and no problem. Makes driving them interesting until the sensor is unplugged!
Now the revs are stable, the only the speed change is that its laboured at take-off and acceleration, certainly no increase in speed.
4rephill said:
I still reckon the gearbox management system is going into "limp home mode" intermittently.
(And I know the gearbox itself has been checked out and found to be mechanically ok, but has the electrical management system been checked out?)
You're right the gear management system hasn’t been checked, would the 'limp' mode not display an orange cock symbol on the dash in this case? However, having spoken to mechanics and BMW veterans, their suggestions are that gear management system error would be detected by the diagnostics and changing gears wouldn’t be as smooth and seamless as they currently are. (And I know the gearbox itself has been checked out and found to be mechanically ok, but has the electrical management system been checked out?)
The O2 sensors were replaced on Friday; an emissions test was done before and after and the results only shy of a difference.
I'm now looking at having it gas converted so that i can contiune enjoying the drive without having to keep one eye on the fuel guage. Not what i want to do but until I find a genuine fix its the only workaround.
Rollcage said:
It does sound as if it needs hooking up to a laptop so that live data values can be analysed in the move and at standstill, and then compared to the data given when it is put through an emissions test cycle. Thus should throw up some anomolies somewhere.
OK thanks, i'll have a look for some cables, theres a link on the thread somewhere. Not sure whose laptop I can borrow to precariously position it under the hood while I go for a drive!OptiManc said:
Thanks for that, its something I could look into. Do you have any idea what the ideal temp should be for the rad hose? What should I look out for on the cam shaft breather valve, bad fitting from wearing?
i just changed the brether vale and pipes out they cost £50.00 from the BMW Specialist the bottom hose was runing cold but i turnded of the fan but left the temp control in the car on hot took off the rad cap let it run till working temp toped up the rad and then found the bottom rad hose was getting hot and from then on found the petrol consunption has gone up Edited by OptiManc on Monday 27th August 15:18
OptiManc said:
OK thanks, i'll have a look for some cables, theres a link on the thread somewhere. Not sure whose laptop I can borrow to precariously position it under the hood while I go for a drive!
On a recommendation from here, I bought a cable from bmwcables.co.uk on eBay, and it arrived with a few DVDs full of software. This let me read the fault codes and clear an airbag fault with no problems on my E46 (after spending several evenings installing the software!). So no problems really, other than the software is quite complicated to set up.For your E36, I think you'll need the cable with the extra "under the bonnet" diagnostics connector/adaptor:
http://www.ebay.co.uk/itm/BMW-Diagnostic-USB-Cable...
Not saying that's definitely the right one for your car though, so please check first :-)
The cable is quite long... you could possibly plug it in, and run it out the bonnet in to the passenger window or something?
Rollcage said:
You need software that will give this sort of capability, and this thread on Bimmerforums should also help.
Yeah, the cable I linked to above came with INPA on one of the DVDs (used it to reset my airbag warning light). Just a note to the OP that the software is a bit of pain to get working. I ended up using an old netbook with 32-bit Windows, which is now my BMW diagnostics machine 
stevesuk said:
Yeah, the cable I linked to above came with INPA on one of the DVDs (used it to reset my airbag warning light). Just a note to the OP that the software is a bit of pain to get working. I ended up using an old netbook with 32-bit Windows, which is now my BMW diagnostics machine
Thank you chaps. I'll get some ordered and dig out that old HP NC6000 
I'll share the results here as soon as they're gathered...
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