Infiniti Q50 Forum banner
Cancel

fuel trim short 125 (BANK 1&2) AFR 20

467 Views 8 Replies 5 Participants Last post by  MNV, 
MNV
Hi all! I need help! A year ago I ran into a problem fuel trim short 125 (BANK 1&2) AFR 20
I changed everything that is possible, but unfortunately it does not help! Some kind of problem with the fuel.
I changed the entire fuel system (nozzles, injection pump, low pressure pump), I cleaned the line itself.
Checked the intake system for leaks.
Changed lambdas and oxygen sensors.
I checked the flywheel, crankshaft and camshaft daotchik.
Rolled everything back to factory firmware.

Unfortunately there is no error DTC code!

In general, if anyone encountered a similar problem, tell me what to do!
Reply
Save
Like
1 - 9 of 9 Posts
T
Is there anyway you can pull the DTC code from the ECU? If you can do that, I think we'd have a much better idea of where to start looking.

Ok I'm going out on a limb here with Google Translate. We'll see if it works haha.

--

Можно ли как-нибудь вытащить код DTC из ЭБУ? Если вы сможете это сделать, я думаю, у нас будет гораздо лучшее представление о том, с чего начать поиски.

Хорошо, я иду на риск с Google Translate. Посмотрим, сработает ли это, ха-ха.
Reply
Save
Like
X
Translated for others:

Hi all! I need help! A year ago, I ran into the problem of a short fuel correction 125 (row 1 and 2).
I changed everything that is possible, but unfortunately does not help! Some kind of fuel problem.
I changed the entire fuel system (injectors, injection pump, injection pump), cleaned the line itself.
Checked the intake system for leaks.
Changed lambdas and oxygen sensors.
Checked the flywheel, crankshaft and camshaft gauge.
Rolled everything back to factory firmware.

In general, if anyone has encountered a similar problem, tell me what to do!
See less See more
Reply
Save
Like
  • Like
Reactions: 1
MNV
twin_snails said:
Is there anyway you can pull the DTC code from the ECU? If you can do that, I think we'd have a much better idea of where to start looking.

Ok I'm going out on a limb here with Google Translate. We'll see if it works haha.

--

Можно ли как-нибудь вытащить код DTC из ЭБУ? Если вы сможете это сделать, я думаю, у нас будет гораздо лучшее представление о том, с чего начать поиски.

Хорошо, я иду на риск с Google Translate. Посмотрим, сработает ли это, ха-ха.
Click to expand...
Unfortunately there is no error DTC code!
Reply
Save
Like
T
I'm not sure where to go from there. Might see if @Avedis53 can weigh in on the issue.
Reply
Save
Like
Avedis53
I have no idea what a "short fuel correction 125" is. If there aren't any DTCs, where did this come from?

Year and engine size please.
Reply
Save
Like
MNV
Avedis53 said:
I have no idea what a "short fuel correction 125" is. If there aren't any DTCs, where did this come from?

Year and engine size please.
Click to expand...
short fuel correction 125% - AFR 20
I have a problem with the fuel mixture ... there is no air leakage.
Reply
Save
Like
Blackhawk77
Guessing he means is short term fuel trims are at 125%
Did you change the fuel pressure sensor ?
You are actually getting more air than expected or less fuel pressure than expected.

What year and engine? Do you have aftermarket intakes?
Reply
Save
Like
MNV
Blackhawk77 said:
Guessing he means is short term fuel trims are at 125%
Did you change the fuel pressure sensor ?
You are actually getting more air than expected or less fuel pressure than expected.

What year and engine? Do you have aftermarket intakes?
Click to expand...
Yes, that's right, I'm talking about them! I've been trying to figure out the problem for about a year now. I wondered if anyone had a similar problem?
I changed the fuel pressure sensor!
the intake ducts were basic and just put filters of zero resistance. I have tried different configurations. VR30DDTT 2020
Reply
Save
Like
1 - 9 of 9 Posts
Infiniti Q50 Forum
A forum community dedicated to all Infiniti Q50 owners and enthusiasts. Come join the discussion about modifications, troubleshooting, hybrids, maintenance, reliability, and more!
Full Forum Listing
Explore Our Forums
Q50 General Discussion Forum Wheels, Tires, Brakes, and Suspension Engine and Technical Discussion Problems & Solutions 3.0t
Top