Runing lean under WOT confused
Nov 17, 2013 | 01:03 PM
#12
Thread Starter
Teching In
Joined: Oct 2012
Posts: 25
Likes: 0
From: sacramento ca
Same pressures with the stock pump. i installed the wideband and pressure gauges before i swaped pumps. now the pressure went up after the new pump. bone stock pressure was at 64-66 at idle after the pump swap 68 at idle. both are way to high eatherway.
Nov 17, 2013 | 05:13 PM
#15
On The Tree
Joined: Feb 2013
Posts: 120
Likes: 0
From: norcal
Something that I noticed in the tune/log, is that you have your fuel trims in affect during Openloop. So you have to take into account what your fuel trims are during WOT. I usually turn this off just to eliminate a variable.
Also, you are running a ton of timing. The reason is because you are only in the 0.40 Cylinder Airmass range. I would play with your timing table and bring those numbers down to the 27-28 ramge. I doubt 30+ degrees is gaining you any power.
What I didn't see in the log was Commanded AFR. This will tell us what AFR the ECU is asking for. That way we can determine if it is a tune issue that is not commanding the correct AFR, or a mechanical issue that is preventing it from supplying the fuel.
Make sure your wideband is hooked up and calibrated too.
The high fuel pressure shouldn't be much of and issue. If anything, it is going to make your injectors act larger then they really are, which would make the truck run lean.
Also, you are running a ton of timing. The reason is because you are only in the 0.40 Cylinder Airmass range. I would play with your timing table and bring those numbers down to the 27-28 ramge. I doubt 30+ degrees is gaining you any power.
What I didn't see in the log was Commanded AFR. This will tell us what AFR the ECU is asking for. That way we can determine if it is a tune issue that is not commanding the correct AFR, or a mechanical issue that is preventing it from supplying the fuel.
Make sure your wideband is hooked up and calibrated too.
The high fuel pressure shouldn't be much of and issue. If anything, it is going to make your injectors act larger then they really are, which would make the truck run lean.
Nov 17, 2013 | 05:56 PM
#16
Thread Starter
Teching In
Joined: Oct 2012
Posts: 25
Likes: 0
From: sacramento ca
Ok got it. Command AFR histogram is set up now working on the wideband. How do I turn off the fuel trims? Dropping the timing is no problem I'll drop it and smooth it out before the next run. As far as the pressure when I do the turbo I have an adjustable so later that wont be a problem. Thank you guys I was sitting here kinda lost.
Nov 17, 2013 | 08:44 PM
#19
TECH Apprentice
Joined: Apr 2013
Posts: 309
Likes: 0
Something that I noticed in the tune/log, is that you have your fuel trims in affect during Openloop. So you have to take into account what your fuel trims are during WOT. I usually turn this off just to eliminate a variable.
Also, you are running a ton of timing. The reason is because you are only in the 0.40 Cylinder Airmass range. I would play with your timing table and bring those numbers down to the 27-28 ramge. I doubt 30+ degrees is gaining you any power.
What I didn't see in the log was Commanded AFR. This will tell us what AFR the ECU is asking for. That way we can determine if it is a tune issue that is not commanding the correct AFR, or a mechanical issue that is preventing it from supplying the fuel.
Make sure your wideband is hooked up and calibrated too.
The high fuel pressure shouldn't be much of and issue. If anything, it is going to make your injectors act larger then they really are, which would make the truck run lean.
Also, you are running a ton of timing. The reason is because you are only in the 0.40 Cylinder Airmass range. I would play with your timing table and bring those numbers down to the 27-28 ramge. I doubt 30+ degrees is gaining you any power.
What I didn't see in the log was Commanded AFR. This will tell us what AFR the ECU is asking for. That way we can determine if it is a tune issue that is not commanding the correct AFR, or a mechanical issue that is preventing it from supplying the fuel.
Make sure your wideband is hooked up and calibrated too.
The high fuel pressure shouldn't be much of and issue. If anything, it is going to make your injectors act larger then they really are, which would make the truck run lean.
