Hi guys - I've posted a few times on here before for help but this time I think I'm out of my league. This issue is likely going on 1 year.
In the picture attached is my most recent DME scan of my 2006 X5 3.0 (138K mi) which was done using PA Soft's scanner which I purchased simply to troubleshoot this issue. Throughout the process I've been working with an indy who is equipped with a GT1 and I thought we had it resolved (see thread: http://www.bimmerfest.com/forums/showthread.php?t=544228) but 2000 miles later, it's back.
The recurring theme is codes 235 (P1190), 236 (P1191). Since purchasing the PA Soft product, I've been able to get more detail than what I get when dropping it off at the indy. While they're terrific guys and I get to speak with the tech face-to-face, I've never really gotten a print out of some sort that showed me all the GT1 was finding though I've never asked either.
Here is the bucket list of items that have been done. Bear in mind many of these were in response to lean codes I was getting previously but potentially misleading because I was using a generic OBDII scanner which I don't believe is as accurate as a BMW scanner. These are in memory order of how I've done them over the past 2 years of ownership as I've been terrible with keeping a log.
All 4 O2s replaced
Beisan Systems VANOS seals
Removed and cleaned ICV & Throttle body & MAF
Valve Cover Gasket
Replaced OE Spark Plugs with NGK Iridium
60K maintenance (@98K miles). This included new fuel filter/FPR.
Oil Separator Valve & Hoses (@100K)
-= at this point I went about 1 year with no CEL issues =-
-= Fall of 2010, the CEL returns with lean codes & "misfire detected, low fuel" =-
Replaced MAF
Replaced air filter
Pre-cat O2s were just replaced again in March 2011.
Valve Cover Gasket (was leaking again) & seals replaced
Air Intake Elbow (cracked on the underside)
Smoke test - clean, no leaks
New gas cap
Replaced NGK Iridiums with OE BMW plugs & torqued.
Had DME software reloaded (@135K mi)
Replaced fuel filter again (@135K mi). Fuel Press. tested @ rail before & after replacement, same value, 50psi.
Indy also said my adaptive values are around 0.2.
-= Made it 2000mi with no CEL then CEL returns with codes (see pic attached) =-
Miscellaneous info:
I've run maybe 3 cans of BG44K through it since ownership in the event injector spray pattern might be causing incomplete fuel burn.
Prior to this scan, last week I did have shadow codes present for a misfire in cyl#5 & cyl#6. I swapped 5&6 with 1&2, cleared the codes and went on a 50mi round-trip journey yesterday but the codes for misfire did not return. I recently returned from a 1000mi round-trip journey where I had it on cruise control @ 80MPH most of the way so it may have occurred during that period but because they're both on the same bank, I don't see that contributing to the case of both banks reporting running rich which has been occurring for some time.
So based on this most recent scan in the pic attached, I need to explain one other attribute of this problem.
-= I am able to get the CEL to go off, with consistency. =-
If the CEL is on and:
1. I drive from home to the Walgreens about 1.5mi away with the engine cold
2. shut off the engine when I get there then
3: start it up again to go back home
4: then shut it off
5. start it up go out to the hardware store about 1.5mi away
6. shut it off then
7. start it up to head home then
8. shut it off.
On the next startup (the 5th), the CEL will go off. This will only happen on short trips (less than 3mi or so). This will also happen whether the engine is cold or not. If on the 5th startup the CEL goes out and I drive somewhere longer where I jump onto the highway, the CEL will likely come back on during that trip.
This has actually happened since day 1 of having the car (@86K miles) and with now seeing these secondary airpump issues, I'm wondering if there isn't some correlation between the startup and drive (while SAP is running) during warmup periods that are causing my probs. I've done a bit of reading to understand how the SAP works and I'm not sure if I"m onto something or not. I typically let the idle settle to below 1K before taking off. That usually takes about 30seconds after startup.
PLEASE let me know if the SAP could potentially be causing my rich issues based on the information I've provided. If I'm missing anything, please let me know. I'm desperate at this point.
In the picture attached is my most recent DME scan of my 2006 X5 3.0 (138K mi) which was done using PA Soft's scanner which I purchased simply to troubleshoot this issue. Throughout the process I've been working with an indy who is equipped with a GT1 and I thought we had it resolved (see thread: http://www.bimmerfest.com/forums/showthread.php?t=544228) but 2000 miles later, it's back.
The recurring theme is codes 235 (P1190), 236 (P1191). Since purchasing the PA Soft product, I've been able to get more detail than what I get when dropping it off at the indy. While they're terrific guys and I get to speak with the tech face-to-face, I've never really gotten a print out of some sort that showed me all the GT1 was finding though I've never asked either.
Here is the bucket list of items that have been done. Bear in mind many of these were in response to lean codes I was getting previously but potentially misleading because I was using a generic OBDII scanner which I don't believe is as accurate as a BMW scanner. These are in memory order of how I've done them over the past 2 years of ownership as I've been terrible with keeping a log.
All 4 O2s replaced
Beisan Systems VANOS seals
Removed and cleaned ICV & Throttle body & MAF
Valve Cover Gasket
Replaced OE Spark Plugs with NGK Iridium
60K maintenance (@98K miles). This included new fuel filter/FPR.
Oil Separator Valve & Hoses (@100K)
-= at this point I went about 1 year with no CEL issues =-
-= Fall of 2010, the CEL returns with lean codes & "misfire detected, low fuel" =-
Replaced MAF
Replaced air filter
Pre-cat O2s were just replaced again in March 2011.
Valve Cover Gasket (was leaking again) & seals replaced
Air Intake Elbow (cracked on the underside)
Smoke test - clean, no leaks
New gas cap
Replaced NGK Iridiums with OE BMW plugs & torqued.
Had DME software reloaded (@135K mi)
Replaced fuel filter again (@135K mi). Fuel Press. tested @ rail before & after replacement, same value, 50psi.
Indy also said my adaptive values are around 0.2.
-= Made it 2000mi with no CEL then CEL returns with codes (see pic attached) =-
Miscellaneous info:
I've run maybe 3 cans of BG44K through it since ownership in the event injector spray pattern might be causing incomplete fuel burn.
Prior to this scan, last week I did have shadow codes present for a misfire in cyl#5 & cyl#6. I swapped 5&6 with 1&2, cleared the codes and went on a 50mi round-trip journey yesterday but the codes for misfire did not return. I recently returned from a 1000mi round-trip journey where I had it on cruise control @ 80MPH most of the way so it may have occurred during that period but because they're both on the same bank, I don't see that contributing to the case of both banks reporting running rich which has been occurring for some time.
So based on this most recent scan in the pic attached, I need to explain one other attribute of this problem.
-= I am able to get the CEL to go off, with consistency. =-
If the CEL is on and:
1. I drive from home to the Walgreens about 1.5mi away with the engine cold
2. shut off the engine when I get there then
3: start it up again to go back home
4: then shut it off
5. start it up go out to the hardware store about 1.5mi away
6. shut it off then
7. start it up to head home then
8. shut it off.
On the next startup (the 5th), the CEL will go off. This will only happen on short trips (less than 3mi or so). This will also happen whether the engine is cold or not. If on the 5th startup the CEL goes out and I drive somewhere longer where I jump onto the highway, the CEL will likely come back on during that trip.
This has actually happened since day 1 of having the car (@86K miles) and with now seeing these secondary airpump issues, I'm wondering if there isn't some correlation between the startup and drive (while SAP is running) during warmup periods that are causing my probs. I've done a bit of reading to understand how the SAP works and I'm not sure if I"m onto something or not. I typically let the idle settle to below 1K before taking off. That usually takes about 30seconds after startup.
PLEASE let me know if the SAP could potentially be causing my rich issues based on the information I've provided. If I'm missing anything, please let me know. I'm desperate at this point.