ECUflash terrible trouble with ECUFlash

[dboyle23]

Just trying to get a BASIC tune on my car so it is at least driveable. Mods in profile

I set the base injector latency and injector scaling as per denso's specs and ceddy's website.

WOT is pretty good, I set all load over 100 to 10.5 and my AFR is reading 10.3-10.7 at WOT

Idle is a different story. Whether it is in closed OR open loop I idle at over 18:1. But this is ONLY after driving it for a bit, if I start it cold it will idle anywhere from 12:1 to 17:1. The car idle surges from 500-800 during idle and just does not sound good at all. No exhaust leaks, I have checked and fixed all of them.

o2 is NOT cycling at all, once in like 3 minutes it will go from 0 to 0.1v. Ceddy says that means my base settings are off, but they're exactly what is posted on his site.

I am not sure what to change, or by how much.
Any suggestions?

 

[m_0ney_pit]

lets start with your fuel trims. post them please and a log after driving for at least 20 miles or so.

you most likely just need to modify your deadtime a bit. Since your wot pull matches your wideband your probably good with your injector size.

 

[dboyle23]

Well, what gets me is that when its cold the AFR is not bad, only when its warm.

Also, if it's too lean (17:1) at idle after it's warm, would that mean that the dead times need to be increased or decreased?

 

[m_0ney_pit]

increase deadtime = richer/more fuel
decrease deadtime = leaner/less fuel

follow the idle tuning guide http://ceddy.us/tuning/injectors/ before you do anything else

 

[dboyle23]

I have been following that guide, but I don't want to let the car idle for 16 minutes at over 18:1 AFR. Thanks for the answer to my question though, I will go adjust it some and then let it idle for a bit with some better AFR's.

 

[Absit]

For a spitball tune you can use STFTs instead of waiting for an LTFT to pop up, just to get it in the ballpark.

 

[Ppayer38]

Have you changed any of the perpriatary bits?
I ran into this issue when I changed 1 set of them for egr once the car got a little heat it idled very lean so checking into that... It was in the 272 bits that gave me trouble, believe thats the set that controls the functions

 

[m_0ney_pit]

You may need to change your injector size a bit larger if you start adding in fuel using the deadtime adjustment. To get my tune to 2% idle ltft and 5% mid ltft I ended up setting to 554 and .2 higher than the base deadtime for the rc 550cc.

 

[dboyle23]

I think I may need an new o2, not sure if that is the problem, but I get the code that says something like "
too much time to enter in to closed loop" or something of that sort.

 

[jakelandry]

Hey man did you ever get the problem fixed?

 

[dboyle23]

One of my injectors was clogged.