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JLBimmer JLBimmer is offline
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Car: 2016 435ix GC
Default 08-15-2019, 01:48 PM

Quote:
Originally Posted by Dave @ BMS/Fuel-It!
mixture control is usually thrown when trims max too long postive or negative- so that SHOULD show up on a log- so keep an eye out.

BEF imo - 100% yes- overall better performance- best of both worlds imo- that may actually eliminate the mixture control issue- if it's trim or afr related.

If you don't want to unplug- some replace the EWG - but i'd try unplugging first- not going to harm anything.
What do I replace the EWG with? Is there a better one than stock out there?
I have BEF loaded and still getting the code. Now it comes on at every start at the first 3 minutes of start. I am getting both the MAF Plausibility and the Rich CEL. I have cleaned the MAF and no change

Anything else to try?


JL Bimmer
2016 435ix Gran Coupe
HRP Cold Air Intake, Charge Pipe, Turbo Up Pipe, Turbo Intake Pipe, BMS Intercooler, Axle Back Exhaust, JB4
H&R Springs, Sways, Strut Tower bar, 19"x10 Rotiforms, Too much carbon goodness
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Terry @ BMS's Avatar
Terry @ BMS Terry @ BMS is offline
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Default 08-15-2019, 08:15 PM

The EWG connector can just be put back to stock as a diagnostic step to ensure it's not faulty and that no JB4 side setting is negatively influencing boost.


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JLBimmer JLBimmer is offline
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Default 08-16-2019, 07:28 AM

Quote:
Originally Posted by Terry @ BMS
The EWG connector can just be put back to stock as a diagnostic step to ensure it's not faulty and that no JB4 side setting is negatively influencing boost.
So this may be a tell tale sign of wastegate issue: In one of my previous postings, I mention that once I disconnected the EWG bypass, cable the car ran like a dog it wasnt boosting up beyond 10 psi. Once I put the cable back it was back to normal. However I will say that I dont recall if the system was 100%% warm yet before testing. I will try that again to report back.

The other issue is the constant check engine light for MAF Plausibility and Mixture ECU: Mixture too rich. I get those everyday now 2 minutes after start as I am parked in the driveway. If I park after a drive (hard/easy) and restart the car its back again. I thought the BEF was supposed to fix that.

One last thing, which BEF was I supposed to use. There were a few, I used the 2014+ EWG flash, but there was a race one as well and on the forum says that I can use the Race one if I run 93 octane or Ethanol. I run 93. so should i use that flash instead?

Is there a way to start over with my JB4? (Baseline with my MHD)

For reference I run Map 5 as my daily. I have seen in 5th and 6th gear 16psi+ Thanks as always Terry for your advice.


JL Bimmer
2016 435ix Gran Coupe
HRP Cold Air Intake, Charge Pipe, Turbo Up Pipe, Turbo Intake Pipe, BMS Intercooler, Axle Back Exhaust, JB4
H&R Springs, Sways, Strut Tower bar, 19"x10 Rotiforms, Too much carbon goodness
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JLBimmer JLBimmer is offline
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Car: 2016 435ix GC
Default 08-20-2019, 10:33 AM

Quote:
Originally Posted by Terry @ BMS
The EWG connector can just be put back to stock as a diagnostic step to ensure it's not faulty and that no JB4 side setting is negatively influencing boost.
Hey Terry,

So Ive taken the EWG cable off and tucked it aside. Here are my actions taken and an update

Changes Made
1. Remove BMS EWG cable,
2. Cleaned MAF
3. Added Dielectric grease to MAF connections
4. Plugged Charge pipe Fuel Vent pipe with Bung Plug
5. Used rubber cap to plug the vent side of Fuel Tank line
6. Re-Flashed MHD with BMS EWG Race map

As a result of these changes here are my results
1. No more Wastegate errors
2. Less MAF sensor CELs only comes up when Mixture too rich Cell occurs
3. Mixture too rich code is still coming once per start.
5. New CEL im getting has t do with the Fuel Tank vent line I capped off.
6. Car no longer can hit 15 psi boost without EWG cable on map 5

Auxilary test
Ran Map 6 with adjusted boost numbers to track 16.5 psi but still the car did not respond. so changed back to Map 5

In conclusion my observations are:
- after removing the EWG Cable no more wastegate errors
- after removing the EWG the wastegate is no longer able to reach beyond 14 psi boost
- after cleaning the MAF the only time I get MAF code is when I get a Mixture Rich code
- after plugging the fuel vent return plug on charge pipe my boost pressure is more stable and predictable at each start
- after plugging the fuel vent return line on charge pipe, I am getting a new CEL "fuel tank ventilation failure ....."

What I would like to try
- Custom Map 6 settings, I want to target 16.5 psi
- Custom flash that will delete the Mixture too rich code for good
- Custom flash that could alleviate the Wastegate Fault codes with the EWG cable that occur with every start

Terry please help. I want to enjoy my drive and my drivers experience
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JL Bimmer
2016 435ix Gran Coupe
HRP Cold Air Intake, Charge Pipe, Turbo Up Pipe, Turbo Intake Pipe, BMS Intercooler, Axle Back Exhaust, JB4
H&R Springs, Sways, Strut Tower bar, 19"x10 Rotiforms, Too much carbon goodness
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