FMOS Racing

What kind of "tweaks" are you guys making to run 60# injectors?

Truck is mass air so I entered the injector slopes and mass air transfer function, adjusted the startup pulsewidth (all I had to do with the EEC-Tuner), and tried to drive it. It goes scary rich at any load and washes out the spark.

I've gone back to my EEC-Tuner for now because using the TwEECer was barely getting me out of the garage.

FMOS Racing

Anyone?

marc2000gt

Bump for you. I am about to make the jump to 60's also.

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1994 Red Lightning #1134 383ci by PSI, S-Trim, Trick Flow T/W heads, Trick Flow Box intake, 60lb injectors, Struckby Two Pump Trick, MSD 6AL, Flexalite 295's, Pickrel Magnaflow Exhaust, Art Carr 2800 stall converter, FTVB, LFP Traction Bars, Struckby mass air wiring, PMAS HPX Mass air sensor. Tweecer RT, Wideband Commander, Binary Editor, EEC Analyzer.

Blue Oval Forever

Jeff,

There are only a few truck running that much injector in a Gen 1 with the stock ECM. Also I do believe Steve has tuned all of the ones that are running them.

Super Glide

Bobby, I think Jeff is using the A9L processor. I looked over his tune in his tweecer. It appears the tune works in the EEC tuner but not the tweecer. The only thing I can think of is your Bank count is set to "1" right Jeff?
Also, try changing the minimum injector pulsewidth to "0". That might work for mass air puters not for ours though. Wish I could help more but this mass air stuff is all greek to me.

FMOS Racing

Steve, I think it's a minimum pulsewidth problem, too, but it's beyond me where to even find that. I've gone through all the tables, functions, and scalars multiple times looking for it and either I've read right past it every time, or it's not there.

I setup my original tune just like the one I ran last year in my EEC-Tuner (and this is in an A9L). With the EEC-Tuner, that tune ran a bit rich, but since I didn't have a wideband mounted in the truck full time yet, I didn't ever get it dialed in exactly. But it wasn't bad (and cruising around with it lately shows cruise a:f ratios about 13.5-14:1). However, that same tune in the TwEECer is mind bogglingly bad. It idles at 11.5:1 and any gas at all makes the wideband peg and the motor break up and stall.

I've pushed the injector sizes all the way to 112 lbs/hr. This leans it out about half an air:fuel ratio. BTW, 112 is as far as it can go and then it overflows and wraps around.

I've pushed my MAF transfer function to 50% richer and 50% leaner just to see what it would do. Nothing. No change at all.

I've moved the injector breakpoint to about everything between .5 and 6.0. No change at all.

I'm honestly nearing my wits end. I don't have time to monkey with this thing since I need to be wrenching on the big block and I'm tired of going to bed at night stinking of way-overly-rich exhaust. My whole garage stinks of it.

It runs much better, except for startup and coast-down, with absolutely no tune at all.

dogman

Ok here are a few things..


Did you cut power to the ecm to clear the KAM ??

When you went from the tweeker to the tuner did you do a clear tuner ??

Did you change meters ?? or is it the same one you used with the 42’s ??

Greg…

dogman

Also there is a function in the shiftmaster software to do an update tuner, do this and make shure it comes back with a tuner up to date message..

Greg

93AZ-L

We tried the Tweecer on my A9L when I first installed the ProM kit on my truck... It gave me nothing but problems with wierd random issues like you're describing... Started burning chips for it and have had no problems since.

kbconv

Might want to grab a tune off of a forum (from a knowledgable and trusted person) and go from there. That is assuming it isn't a connector or Tweecer electrical issue of course. What version of software are you using? Have you tried with both the old (A9 I think) and the newer release (B?). Same results?

If your using the latest release maybe you are getting bit by a bug, although if your A9L I would think that to be stable. Also, try reading and then writing to the EEC. Do you have datalogging, RT? If so is it working properly (just for a simple handshaking and software check)? Seems like some swear by Tweecer and others swear at them, must be some reason.

Back to grabbing a tune. If your running A9L, try a close Mustang tune just to see if it makes any difference (I know, the load's are gonna probably be different due to our weights and I wouldn't get on it until sure of tune). I tried entering simple parameters for my Cobra to get it started with a new combo (42's and Ligntning MAF). I thought it should work but was off. I solicited tunes off of the corral.net and eectuning.org and got a couple that worked pretty nice with just a CID change, I just haven't had the time to play with the Tweecer yet. They are J4J1 (95 Cobra) based or I would share with you.

Lastly, did you buy Tweecer from Mike (in the past) or a vendor. I think Mike has been getting some more info out now, might want to run it by him still. You should see some change. The part about no change at all is what really stands out of course. I could speculate, but I just know enough to be dangerous.

I am just getting into the L stuff so have know idea how Tweecer support is for our SD processors, I think the latest release does have better support I heard though.

FMOS Racing

I'm afraid that's what I'm looking at, and I can't figure out how people have dealt with it.

I ran the same injectors and the same mass air meter all last year with the EEC-Tuner. I bought a TwEECer RT because I wanted the data logging and figured it was more mature than the EEC-Tuner. I really have my doubts right now.

Greg, believe me, this thing hasn't ran long enough to learn any trims... But yes, I've cleared the EEC with the battery disconnect.

Today I tried running the stock MA transfer function and injector size, just adjusted the startup pulsewidth and it idles great and cruises great and even is decent at WOT, but as soon as I let off the gas, whether just at cruise or from WOT, the truck goes pig rich and floods out, is hard to restart, and is finnicky for a while unless I ride the throttle. I tried raising the idle setting, twiddling with the limp MAF table, etc and it didn't help any.

I'm going to try the Bin Editor and see if a Bin written to the TwEECer with it will not have this insane behavior.

94SVT437

Dumb quest Jeff,
Do you have the tweecer on one of the end setting for the 4 positions on the switch. I would try loading the same file on one of the middle spots if you havent all ready.

I do agree with you about the EEC Tuner. I think it is more user friendly over the tweecer.

FMOS Racing

Appears to be a problem with the A9L strategy in the TwEECer. I created a very similar (though not yet complete, but more complete than some of my other attempts) load through Bin Editor (an interesting piece of software), downloaded it to the TwEECer hardware, and the truck runs beautifully (minus a MAF fault on coast down that I know how to fix).

Never been that frustrated working on a tune before...

dogman

Cool.. Are you using the gui to save a bin file?? or something else??

Greg

FMOS Racing

The BinaryEditor (see http://eectuning.org/forums/viewtopic.php?p=44729#44729 ). I think I'm going to go ahead and register a copy, even though I think his licensing policy is somewhat restrictive. May have to give the EEC Analyzer a spin, too.