|
||||||
| Software Tuning Discuss all software tuning topics. |
![]() |
|
|
Thread Tools | Search this Thread |
|
|
#1 |
|
Software Hobbiest
Join Date: Aug 2019
Drives: 2015 FRS
Location: San Diego
Posts: 160
Thanks: 26
Thanked 19 Times in 15 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
high fuel trims
Back 3 months ago I zeroed out all of my fuel trims buy adjusting the MAF sensor and they stayed zero. Now 3 months later I have all positive fuel trims some up to 9%. The only thing that has changed is the air filter and the temperature. Do you think that could be the variable that changed or is it a sign of something else.
Ex. the combined fuel trim at 600rpm 0.15 engine load is at +8.1% |
|
|
|
|
|
#2 | |
|
The Dictater
Join Date: Apr 2017
Drives: '13 Red Scion FRS
Location: MD, USA
Posts: 9,646
Thanks: 26,684
Thanked 12,705 Times in 6,293 Posts
Mentioned: 88 Post(s)
Tagged: 0 Thread(s)
|
Quote:
|
|
|
|
|
|
|
#4 |
|
Banned
Join Date: Dec 2013
Drives: FT86
Location: Australia
Posts: 7,996
Thanks: 1,035
Thanked 4,993 Times in 2,983 Posts
Mentioned: 598 Post(s)
Tagged: 2 Thread(s)
|
fuel trims at idle can vary quote a bit with large variations in intake air temperature.
Add 4% to maf scale in that low end area then 2% to thexarea jist above to smooth it in |
|
|
|
| The Following User Says Thank You to steve99 For This Useful Post: | dholloway543 (12-22-2020) |
|
|
|
|
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Possible vacuum leak? (Running lean and high fuel trims) | nickw14 | Engine, Exhaust, Transmission | 6 | 02-10-2023 11:56 AM |
| Help needed please, High negative short term fuel trims | Kris86 | Issues | Warranty | Recalls / TSB | 11 | 11-26-2020 06:39 AM |
| What would make fuel trims high when engine is cold but OK after warmed up? | kev0 | Issues | Warranty | Recalls / TSB | 11 | 01-06-2020 03:44 PM |
| short term fuel trims high at idle and and partial throttle | Minidude147 | Software Tuning | 5 | 03-28-2019 06:53 AM |
| Sudden high fuel trims - help please! | cawith | Issues | Warranty | Recalls / TSB | 13 | 10-15-2015 05:30 PM |