High fuel trims at idle and load
#1
High fuel trims at idle and load
As the title says I am dealing with high fuel trims. At idle bank 1 sits at 25% and bank 2 sits at 21%
1500 rpm bank 1 sits at 21% and bank 2 sits at 20%
2500 rpm both banks sit at 18% and any higher they go back up.
does anyone have any clue as what could be causing this? Truck is 1998 F150 5.4 V8 Lariat.
//UPDATE// I have done a smoke test and couldnt find any bad lines. I did the carb cleaner method and had no surging. At this point I think it's a fuel issue.
1500 rpm bank 1 sits at 21% and bank 2 sits at 20%
2500 rpm both banks sit at 18% and any higher they go back up.
does anyone have any clue as what could be causing this? Truck is 1998 F150 5.4 V8 Lariat.
//UPDATE// I have done a smoke test and couldnt find any bad lines. I did the carb cleaner method and had no surging. At this point I think it's a fuel issue.
Last edited by Whitefrost; 04-22-2021 at 03:45 PM.
#2
#3
#6
https://www.obd-codes.com/p0171
What is the fuel pressure?
#7
P0171 is for bank 1. Are you receiving a similar code for bank 2? Read this if you haven't already.
https://www.obd-codes.com/p0171
What is the fuel pressure?
https://www.obd-codes.com/p0171
What is the fuel pressure?
Trending Topics
#8
The following users liked this post:
#9
If you're only getting the one side code, the problem is not likely the MAF, fuel filter or an air filter. Those are items likely to affect both sides. And since you haven't found any air leaks, i agree with the idea to test/check the injectors on the bad side. Make sure they are all working. There are some tutorials on line for how to test them.
#10
If you're only getting the one side code, the problem is not likely the MAF, fuel filter or an air filter. Those are items likely to affect both sides. And since you haven't found any air leaks, i agree with the idea to test/check the injectors on the bad side. Make sure they are all working. There are some tutorials on line for how to test them.
#11