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Old 11-08-2019, 01:33 AM   #1
Cibby600
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INPA and resetting adaptions + Bad fuel economy!

Hi All,

I recently did a LOT of work on my car.
I changed / repaired the following:

Rebuilt VANOS
Replaced entire CCV system
Replaced intake boots and DISA valve
Replaced intake manifold gasket
Replaced all perished and cracked vacuum lines and hoses
Replaced throttle body gasket
Replaced VCG and dipstick O rings
Replaced coolant temp sensor and cam position sensor (Ex)
Replaced injector O rings and filter screens
Cleaned MAF, TB and IAC
Replaced OFH Gasket
Replaced water pump
Replaced all drive belts and tensioners

I did some other work, but unrelated, removed mechanical fan etc.

So car runs great except for a purge valve error. No big drama, I'll get there eventually.

So I recently installed INPA and went to reset my adaptions as the car has been running in a neglected state for a LONG time and has just had a heap of repairs done.

Car was idling and I was mashing keys and clearing adaptions.
Now I really should have read exactly what each adaption does as I got to F4 or F6, can't remember exactly, but RPM rose to about 1300 and throttle did nothing. Car bogged and wouldn't accelerate.

I quickly turned the car off and then tried to restart it. It started ok, idled ok, so I went for a drive.
Car drives OK. MAYBE a little down on power, but could be my paranoia!! lol

QUESTIONS:

Could I have done any damage resetting adaptions with car running??????

Car is also still using a lot of fuel.
I think the thermostat is stuck open as it takes a long time to warm up. Runs at 187 degrees farenheit when hot.
Will fuel consumption possibly settle after resetting adaptions, or more related to soft failing thermostat. Getting around 14 - 15MPG

Car is a 2001 325i Auto Sedan with 200K KMS

Sorry in advance for my ramblings! lol

Cheers.
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Old 11-08-2019, 01:43 AM   #2
darkfires102
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Shouldve reset with the car on power on mode only, not engine running, huge mistake. MPG will come back later after adaptation occurs again. Damage done? unlikely if the car is running fine now. Soft thermostat will hurt mpg since the car will be dumping fuel in to try and heat up quicker
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Old 11-08-2019, 02:56 AM   #3
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+1 ^

Soft failing tstat will hurt fuel economy. Hopefully that 14 to 15 mpg is city driving, not highway. Operating temp is around 96C, btw.

While you are in there, it's a good idea to replace the expansion tank (if that hasnt been done recently) since that is a major weakness of the cooling system. With an auto, you also will need to change the atf thermostat that is at bottom of ET as it often breaks when the ET is removed.

You may also want to look around the transmission for signs of leaking ATF, including at the selector shaft where it goes into side of transmission. Low atf levels can cause sluggishness and probably a loss of fuel economy.
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Old 11-08-2019, 03:34 AM   #4
Cibby600
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Originally Posted by LeverThis View Post
+1 ^

Soft failing tstat will hurt fuel economy. Hopefully that 14 to 15 mpg is city driving, not highway. Operating temp is around 96C, btw.

While you are in there, it's a good idea to replace the expansion tank (if that hasnt been done recently) since that is a major weakness of the cooling system. With an auto, you also will need to change the atf thermostat that is at bottom of ET as it often breaks when the ET is removed.

You may also want to look around the transmission for signs of leaking ATF, including at the selector shaft where it goes into side of transmission. Low atf levels can cause sluggishness and probably a loss of fuel economy.
Auto is reasonably leak free. Will be doing a full fluid and filter change in the near future so will double check it.
Think I'll just do thermostat for now and hope I don't break anything when swapping it out. Will check fuel economy then refressh cooling system later.
Yes city driving BTW.

Thanks.
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Old 11-08-2019, 04:48 AM   #5
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14 mpg is still too much unless you rev to red zone from every traffic light. Iíd recommend to get a close look at MAF. The way it affects driving is hugely underestimated usually and paid attention only when your instrument panel lights like a Xmas tree. cleaning usually doesnít do much unless it really was covered with dust, and even using proper MAF cleaner doesnít guarantee safe result. It could still work but not right. It wonít show any codes, but if you swap it with new one youíll see noticeable difference.



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Old 11-08-2019, 11:46 AM   #6
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14 mpg is still too much unless you rev to red zone from every traffic light. I'd recommend to get a close look at MAF. The way it affects driving is hugely underestimated usually and paid attention only when your instrument panel lights like a Xmas tree. cleaning usually doesn't do much unless it really was covered with dust, and even using proper MAF cleaner doesn't guarantee safe result. It could still work but not right. It won't show any codes, but if you swap it with new one you'll see noticeable difference.
The MAF can and will trip trouble codes if it falls too far out of range or if there's a problem with the circuit.

I would not blindly replace the MAF, or any other part for that matter. Check its performance first. The MAF at warm idle with accessories off should be between 3.6-4.2 g/s. MAF should be genuine BMW or Siemens/VDO brand.
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Old 11-08-2019, 11:50 PM   #7
Cibby600
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The MAF can and will trip trouble codes if it falls too far out of range or if there's a problem with the circuit.

I would not blindly replace the MAF, or any other part for that matter. Check its performance first. The MAF at warm idle with accessories off should be between 3.6-4.2 g/s. MAF should be genuine BMW or Siemens/VDO brand.
Here is a screenshot at idle before deleting adaptions. Pretty sure it's the original MAF.
I will check again tomorrow as I went for a 60KM drive today. Getting almost 17MPG after todays city drive.
Will check further tomorrow.

Cheers.
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Old 11-09-2019, 12:33 AM   #8
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Quote:
Originally Posted by Cibby600 View Post
Here is a screenshot at idle before deleting adaptions. Pretty sure it's the original MAF.
I will check again tomorrow as I went for a 60KM drive today. Getting almost 17MPG after todays city drive.
Will check further tomorrow.

Cheers.
Your MAF value of 12.5 kg/hr converts to 3.47 g/s, which is fine.

Post the L-probe and A-reg screens as those show the O2 sensors and fuel trims.
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Old 11-09-2019, 05:57 AM   #9
Cibby600
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No probs. Will do it tomorrow. I am guessing it is just down to the EVAP purge solenoid and 200K on the motor.
Cheers.
Bloody valve cover gasket is leaking again. Replaced it a month ago. Oh well, time to rip it out and RTV it! LOL

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Old 11-09-2019, 12:13 PM   #10
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Regarding clearing adaptations, I have seen a few cases where clearing all DME adaptations using INPA significantly improved engine running. Cannot tell you exactly why. In the course of doing over 300 free DME and EGS updates over the years I have seen it more than once.
I've never seen a case where clearing adaptations hurt anything. Make sure the engine is off while clearing.
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Old 11-09-2019, 12:19 PM   #11
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Bloody valve cover gasket is leaking again. Replaced it a month ago. Oh well, time to rip it out and RTV it! LOL
Itís pretty common to get hairline cracks on these old plastic valve covers, so check for that. May be the source of your leak if the gasket is fairly new. Iíve patched them with JBWeld.
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Old 11-09-2019, 04:31 PM   #12
Cibby600
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Will double check the valve cover for cracks as I didn't when it was off last time.
Engine seems to be running a little better after resetting adaptions. Not much, but a little.
Perhaps after "relearning" for a while it will run a little better again.
Yeah, I should have read up on resetting adaptions as my motor was running when I did it. Doesn't seem to have hurt it, but lesson learned!
Thanks everyone. Will post screenshots of O2 sensors and Fuel Trims later today!
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Old 11-10-2019, 03:58 AM   #13
Cibby600
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Well, everything looks ok. Could be a little better, but motor has 200K KMs!
I think long term fuel trims are either perfect, lol, or perhaps not reading yet as I reset adaptions 70KMs ago.
I am posting VANOS as I have nothing to compare it to. Does it look ok???
If anything doesn't look right, please let me know.

P.S. My car does not have post cat O2 sensors.

Cheers.
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Old 11-11-2019, 07:48 AM   #14
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Long term fuel trims will correct themselves after just a few miles on their own. Thatís what they do.


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Old 11-11-2019, 02:01 PM   #15
Cibby600
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Long term fuel trims will correct themselves after just a few miles on their own. Thatís what they do.


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Old Today, 02:20 AM   #16
Cibby600
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So just an update.
I replaced the thermostat that was stuck open, and reset all DTC's and Adaptions. WITHOUT THE ENGINE RUNNING this time! lol
Everything looks good, car drives great and fuel economy is down to about 20MPG with mainly city driving.
Running temps are now around the 200 Degrees F. So Win Win!
Still have an EVAP purge valve that has a dead short, so might get better economy again when I get around to replacing that!
Thanks again for all your help and advice people!

Cheers.
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Old Today, 12:51 PM   #17
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While you are in there, it's a good idea to replace the expansion tank (if that hasnt been done recently) since that is a major weakness of the cooling system. With an auto, you also will need to change the atf thermostat that is at bottom of ET as it often breaks when the ET is removed.
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Old Today, 01:55 PM   #18
Cibby600
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I did think about it, but time and money dictated the repairs, as I needed the car back on the road and had bills to pay! LOL
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