fuel trims high, what gives
Aug 17, 2007 | 03:23 PM
#11
Originally Posted by BLK02WS6
Posative fuel trims (lean) at part throttle are added on top of the open loop fueling when you go to WOT. It is the computers way of attempting to save a lean running engine when you go into WOT. Whatever posative fueling you have at the time it goes into open loop locks in until you go back to closed loop.
If you have no vacuum or exhaust leaks, then its the tune. But if you have LTFTs that high at idle, you likely have a leak somewhere. Spray it down with carb cleaner while its running, and you'll find it if its vacuum. Exhaust should be obvious.
If you have no vacuum or exhaust leaks, then its the tune. But if you have LTFTs that high at idle, you likely have a leak somewhere. Spray it down with carb cleaner while its running, and you'll find it if its vacuum. Exhaust should be obvious.
Does it work the same way for negative trims? Just positive right.
Aug 17, 2007 | 03:27 PM
#12
Originally Posted by dewmanshu
what the hell...you hiding? you gonna be at MIR 9/22?
Does it work the same way for negative trims? Just positive right.
Does it work the same way for negative trims? Just positive right.
Naw, I've been around. Posted up a Hi in the eastern section, but got no love around here - thought I musta pissed someone off lol! What's up on 9/22? Edit: Now I see - didn't associate EFA with here - yeh, I should be there with the car.
Yeh, only works that way on positive trims, not negative. Guess they figured if its rich, safer not to pull at WOT.
Last edited by BLK02WS6; Aug 17, 2007 at 03:38 PM.
Aug 17, 2007 | 05:21 PM
#14
I took a quick look at Sean's setup when we were done logging. It really doesn't look like he has any intake leaks anywhere. All of his CAI connections are solid, and the intake manifold and vacuum lines have not been messed with.
As far as the IAT's, they were crazy high from him sitting with the engine running for about 10 minutes or so before I got there. I think the ambient was about 110 or so. They started to come down on the drive, and by the time we were done about 10 minutes later they were down to about 145* or so.
As far as the IAT's, they were crazy high from him sitting with the engine running for about 10 minutes or so before I got there. I think the ambient was about 110 or so. They started to come down on the drive, and by the time we were done about 10 minutes later they were down to about 145* or so.
lol!
Aug 17, 2007 | 05:30 PM
#16
Originally Posted by thunder550
I took a quick look at Sean's setup when we were done logging. It really doesn't look like he has any intake leaks anywhere. All of his CAI connections are solid, and the intake manifold and vacuum lines have not been messed with.
As far as the IAT's, they were crazy high from him sitting with the engine running for about 10 minutes or so before I got there. I think the ambient was about 110 or so. They started to come down on the drive, and by the time we were done about 10 minutes later they were down to about 145* or so.
As far as the IAT's, they were crazy high from him sitting with the engine running for about 10 minutes or so before I got there. I think the ambient was about 110 or so. They started to come down on the drive, and by the time we were done about 10 minutes later they were down to about 145* or so.
Aug 17, 2007 | 06:21 PM
#17
Originally Posted by BLK02WS6
If the exhaust is tight, then needs more tuning with a wideband. Unless the MAF or something was changed though, that is alot to be off at low power levels. Something doesn't add up.
Aug 17, 2007 | 06:25 PM
#18
Originally Posted by dc_justin
The problem persists with both his wait4me and stock PCM. With a stock MAF and MAF Calibration, it has to be a mechanical issue of some sort, whether it be a leak, fault MAF or a fuel issue.
Hey, I just saw that you are an EFI instructor and you are close to me. Do you have any courses coming up in the area? If so, can you PM me details. Thanks!
Bret
Aug 17, 2007 | 06:33 PM
#19
Originally Posted by BLK02WS6
Agree.
Hey, I just saw that you are an EFI instructor and you are close to me. Do you have any courses coming up in the area? If so, can you PM me details. Thanks!
Bret
Hey, I just saw that you are an EFI instructor and you are close to me. Do you have any courses coming up in the area? If so, can you PM me details. Thanks!
Bret
Aug 17, 2007 | 07:18 PM
#20
Originally Posted by dc_justin
Do you use EFILive at the shop? You use a mustang dyno, right? Eddy current absorber?
Sorry bout the hijack!!