N54Tech.com - International Turbo Racing Discussion
(#1)
Old
Looters Looters is offline
New Member
 
Posts: 13
Join Date: Jan 2020
Car: C43
Default Jb4 c43 running rough / throwing engine lights /low boost - 11-01-2020, 01:03 PM

I have a 2018 c43 with jb4 only. Run 4-5 gallons of e85 with a tank of 93. For the past week I've been seeing engine lights daily for 2177 and 2179 codes. Also the car is running sluggish on any map. It will often hesitate/ jerk after startup and driving until everything is warmed up (logs attached). One morning it nearly stalled out and rpms jumped around a ton. Logs show boost levels not where they were on previous runs on map 2 and 3. What could be causing this?
Attached Files
File Type: csv P23_M2_R1_201030_153036.csv (7.6 KB, 157 views)
File Type: csv P23_M3_R1_201031_154530.csv (11.2 KB, 149 views)
Reply With Quote
(#2)
Old
Terry @ BMS's Avatar
Terry @ BMS Terry @ BMS is online now
Tuner
 
Posts: 33,849
Join Date: Jan 2008
Default 11-01-2020, 04:25 PM

They are o2 sensor/fuel trim sorts of faults. Probably due to the E85 mix. As a test could lower the E85 mix.

At WOT boost looks lower, but temperature is also colder, so you'll have less of a target. If there isn't a boost leak then adding in a BCM would really wake this car up I think.


Burger Motorsports
Home of the JB4 the worlds most popular turbocharged tuning system!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
Reply With Quote
(#3)
Old
Looters Looters is offline
New Member
 
Posts: 13
Join Date: Jan 2020
Car: C43
Default 11-01-2020, 04:32 PM

Thanks for the input. I was running a little more e85 than normal so let it get down to half a tank and topped it off with 93. Seems to have helped some and havent thrown a code yet . Going to order the BCM from your site and give that a try.
Reply With Quote
(#4)
Old
Looters Looters is offline
New Member
 
Posts: 13
Join Date: Jan 2020
Car: C43
Default 11-07-2020, 06:34 PM

Mind taking a look at these logs? Lowered e85 to roughly 2.5-3 gallons on full tank of 93...I ordered the bcm and installed and first pull after install was easily the quickest the car has ever felt. Few minutes later did a quick 40 to 70 pull and felt super sluggish. Here's both logs. I also replaced both map sensors to rule that out. Any other ideas what to look for or causes?

Quote:
Originally Posted by Terry @ BMS
They are o2 sensor/fuel trim sorts of faults. Probably due to the E85 mix. As a test could lower the E85 mix.

At WOT boost looks lower, but temperature is also colder, so you'll have less of a target. If there isn't a boost leak then adding in a BCM would really wake this car up I think.
Attached Files
File Type: csv P23_M2_R1_201107_201727 good.csv (10.6 KB, 146 views)
File Type: csv P23_M0_R1_201107_202232 bad.csv (5.2 KB, 145 views)
Reply With Quote
(#5)
Old
Terry @ BMS's Avatar
Terry @ BMS Terry @ BMS is online now
Tuner
 
Posts: 33,849
Join Date: Jan 2008
Default 11-07-2020, 06:56 PM

Your boost safety is set to 14.1psi, that's way too low. Raise it to 18psi.


Burger Motorsports
Home of the JB4 the worlds most popular turbocharged tuning system!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
Reply With Quote
(#6)
Old
Looters Looters is offline
New Member
 
Posts: 13
Join Date: Jan 2020
Car: C43
Default 11-11-2020, 03:30 PM

Quote:
Originally Posted by Terry @ BMS
Your boost safety is set to 14.1psi, that's way too low. Raise it to 18psi.
Ran this tank down to almost empty, filled up with some ethanol free premium and so far no engine lights thrown after 30 miles or so. Going to probably stay away from e85 for a bit. Mind taking one more look at this run with boost control module installed? This was map 2. Everything felt strong.
Attached Files
File Type: csv P23_M2_R1_201111_170114.csv (8.0 KB, 147 views)
Reply With Quote
(#7)
Old
Terry @ BMS's Avatar
Terry @ BMS Terry @ BMS is online now
Tuner
 
Posts: 33,849
Join Date: Jan 2008
Default 11-13-2020, 04:50 PM

Looks as expected to me!


Burger Motorsports
Home of the JB4 the worlds most popular turbocharged tuning system!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
Reply With Quote
(#8)
Old
Looters Looters is offline
New Member
 
Posts: 13
Join Date: Jan 2020
Car: C43
Default 02-25-2021, 09:37 AM

Just in case its helpful to anyone else with similar issues, I was getting daily codes 2177 and 2179 every time I drove the car. Used one bottle of Chevron Techron fuel system cleaner and haven't had a code since. So obviously the e85 was too much for the stock fuel system on my car over the course of a year. I've been running 93 octane only now.
Reply With Quote
(#9)
Old
Looters Looters is offline
New Member
 
Posts: 13
Join Date: Jan 2020
Car: C43
Default 11-09-2021, 09:10 AM

Old thread but may be of valuable info to some. So had the jb4 off the car for a few weeks and still have been throwing periodic p2179 p2177 codes, haven't ran e85 in a long time. Took it to the dealer who replaced the fuel pump and fuel injectors. Actually said they ended up replacing the whole fuel rail due to lack of parts. Think I'll be sticking to 93 only from here on out.

Quote:
Originally Posted by Terry @ BMS
They are o2 sensor/fuel trim sorts of faults. Probably due to the E85 mix. As a test could lower the E85 mix.

At WOT boost looks lower, but temperature is also colder, so you'll have less of a target. If there isn't a boost leak then adding in a BCM would really wake this car up I think.
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump




vBulletin Skin developed by: vBStyles.com
Copyright 2007 - 2020, N54tech.com