Dave86
Friday 29th March 2013, 21:27
I'm now a traitor and have defected to the germans and im having some issues with it as follows;
1. Car lacks power in general (Not helped by only having a 1.9 8v engine)
2. At first start up it idles perfectly but when you start driving it pops and bangs hesitates then after a minite its ok
3. At WOT it loses nearly all power until you back of slightly then pulls ok
Found all the air leaks and have repaired them, only 1 code comes up which is P0170 (Fuel trim malfunction - Too lean)
Long Term Fuel Trim is about +22%
Short Term Fuel Trim is the same
O2 sensor 1 voltage at idle fluctuates between 0.4 - 0.6 which i think is fine
O2 sensor 1 voltage while driving is 0 - 0.1 (This is not just under heavy load it also reads this while maintaining a constant speed on flat road)
When coasting the sensor sometimes flashes 0.8 - 0.9 for a split second them goes straight back to 0.1
O2 sensor 2 seems to read fine at all times and generally stays between 0.4 - 0.6 under most driving conditions
No black smoke from the exhaust the exhaust gases don't smell overly petrol-ly (I'm sure that's not a real word)
So i'm assuming its not over fuelling
Recently changed the cam sensor as that was throwing a code also changed the fuel filter, Both within the last couple of weeks
I've tried checking the fuel pressure by pushing the schrader valve on the fuel rail but I couldn't get anything to some out even with the engine running which seemed strange
Although I would of thought low fuel pressure would of thrown a code?
Or if there was no pressure it just wouldn't run at all.
These a whole list of things it could be according to google, I'm just trying to narrow it down a bit.
Any advice appreciated
If it helps the car is a 2001 BMW 318 with a M43TUB19 engine
Cheers
Dave
1. Car lacks power in general (Not helped by only having a 1.9 8v engine)
2. At first start up it idles perfectly but when you start driving it pops and bangs hesitates then after a minite its ok
3. At WOT it loses nearly all power until you back of slightly then pulls ok
Found all the air leaks and have repaired them, only 1 code comes up which is P0170 (Fuel trim malfunction - Too lean)
Long Term Fuel Trim is about +22%
Short Term Fuel Trim is the same
O2 sensor 1 voltage at idle fluctuates between 0.4 - 0.6 which i think is fine
O2 sensor 1 voltage while driving is 0 - 0.1 (This is not just under heavy load it also reads this while maintaining a constant speed on flat road)
When coasting the sensor sometimes flashes 0.8 - 0.9 for a split second them goes straight back to 0.1
O2 sensor 2 seems to read fine at all times and generally stays between 0.4 - 0.6 under most driving conditions
No black smoke from the exhaust the exhaust gases don't smell overly petrol-ly (I'm sure that's not a real word)
So i'm assuming its not over fuelling
Recently changed the cam sensor as that was throwing a code also changed the fuel filter, Both within the last couple of weeks
I've tried checking the fuel pressure by pushing the schrader valve on the fuel rail but I couldn't get anything to some out even with the engine running which seemed strange
Although I would of thought low fuel pressure would of thrown a code?
Or if there was no pressure it just wouldn't run at all.
These a whole list of things it could be according to google, I'm just trying to narrow it down a bit.
Any advice appreciated
If it helps the car is a 2001 BMW 318 with a M43TUB19 engine
Cheers
Dave