Odd fueling issue, choppy pulse width

[mxguy1286]

Problem
So the problem I am having is that the car is very choppy and I am finding that the pulse width will not increase smoothly and never exceeds 4.0msec. It pretty much will stay at 2.7msec or 4.0 msec and it is killing me trying to figure out why. The car will idle at about 12.9-13.3 afr and soon as you start to give the car some load it starts surging due to it being too lean then it throws fuel at it for a second and takes it back. I can actually bring the rpm up some and go full throttle and the pulse width will stay at 2.6. Also I noticed some times only bank1 or bank2 will show a increase in pulse width.

Back round on the car
Here is a thread I started a few weeks back. I ended up paying the credits and starting with a 2000 ls1 cal file I found on here and now the car will start and free rev better but still getting the issues above.
http://www.hptuners.com/forum/showthread.php?t=41990

mods
The car is a 390ci turbo engine
127lb high imp. bosch injectors
317 heads
gm 3bar and speed density os
Custom cam
s475 turbo

Things I have tried
I have tried playing with the ve table like crazy, flattening it, jacking the table in either direction near the problem area, play with injector scaling and latency and copied every value I can from another car I did on speed density that runs perfect with the same injectors and close to same size engine.

logs
Pulsewidthfreakout- shows a smooth idle to me starting to give it some load and it surging and the pulse width just jumping 2.6 to 4.0 and back.

Stall city log- shows me slowly bringing up the rpm and going full throttle and the pulse width flat lines.

I have also attached a cal file. It may look a little funny but thats just from me playing with it all day and trying so many things.



Please any help or input is greatly appreciated.

[Ben Charles]

Ive never seen ANYONE have luck with the large bosch injectors, probably have to get some injectors with known quality data

[mxguy1286]

Ive never seen ANYONE have luck with the large bosch injectors, probably have to get some injectors with known quality data

https://www.youtube.com/watch?v=8SVPLet904s

Tell that to this car. This is the only other car I have tuned on hp tuners and it was a breeze. Runs great no issues what so ever. Pulse width freaking out has nothing to do with the hardware on the ends of the wires.....

[Ben Charles]

FIC is coming out with a large Bosch injector in March Id probably use.

Good luck with it

[stmz28]

https://www.youtube.com/watch?v=8SVPLet904s

Tell that to this car. Runs great no issues what so ever. Pulse width freaking out has nothing to do with the hardware on the ends of the wires.....

The car in the video is mine with the same injectors and runs great

[Ben Charles]

The car in the video is mine with the same injectors and runs great

They you go OP, get some info from this guy

[stmz28]

They you go OP, get some info from this guy

mxguy1286 tuned my car

[Ben Charles]

Just looked at the tune. The data can't be right, half of the injector data is STOCK.

What pressure is those injectors rated at, 3 or 4 bar?

Your OLFA needs a ton of work. 1.0 across the board?

And what the hell is up with the spark tables??

IF your boosted (3bar SD) you need to richin up that PE table, BE can be lazy to kick in at times.

[mxguy1286]

Just looked at the tune. The data can't be right, half of the injector data is STOCK.

What pressure is those injectors rated at, 3 or 4 bar?

Your OLFA needs a ton of work. 1.0 across the board?

And what the hell is up with the spark tables??

IF your boosted (3bar SD) you need to richin up that PE table, BE can be lazy to kick in at times.

Injectors at 43. psi. The injector settings are exactly what I used on the other car I did with these injectors and that one is great.

The car has no o2 sensors. Tuning just off the ve table. The car is speed density 3 bar.

Spark tables is just a quick base set up.

On the other car I did I didnt bother with be. or p.e and that one had no lean issues. I just flat lined them two tables and that thing has no lean issues at all. Tuned off the ve table only. That is a procharger and builds boost instantly. From what I understand p.e. and b.e. dont come into play until higher load and wot conditions anyway.

[Ben Charles]

What do you mean you didn't bother with VE or BE??? Meaning you zeroed them out? Kinda of hard to tune the VE table without being about to see commanded AFR/lambda, what are you doing guessing?

With your OLFA table set at 1.0 across the board you saying you want stoich all the time. Engine need extra fuel when its cold, you can run stoich in the warmer ECT's. This table is referenced in OL and needs to be adjusted.

Just b/c your OL full time, does mean the table needs to be stoich lol.

You running an Adjustable FPR?

P.S. your not failing into SD correctly either, but since you zeroed out the MAF the computer has to default to it, but its just good practice to set SD correctly

[mxguy1286]

........

[Ben Charles]

Guess you know it all

Good luck

[mxguy1286]

Yeah i guess ill just buy new injectors. That will fix it all.

[mxguy1286]

Edited a few things.

Can someone please let me know if there is something not set up right in the cal for it to be running speed density. Ben Charles Said "your not failing into SD correctly either, but since you zeroed out the MAF the computer has to default to it, but its just good practice to set SD correctly". Not sure what he mean by that one but if I am doing something wrong as far as getting it ot run on speed density maybe thats why the pulse signal will not gradually raise.