maf wont fail right away. OLSD.

[s106banger]

i run an 0411 on my 97 s10, and i figured this would be a better place for this and get more attention.

the engine is built with a mild comp cam, vortec heads, marine intake w/42lb injectors, syclone manifolds, 61mm turbonetics turbo, and a 3500 rpm stall.

im running a gm 2 bar map with the custom 2 bar os.

i have to try starting this thing 20-30-40 times before it fails the maf and finally starts. i actually just toasted my starter tonight....

i found an older thread that looks like someone deleted some comments in it with some good information, but i cant get enough out of it to try anything.

if anyone has some suggestions im willing to try them. heres my tune, its just a tune to get the truck running.

thanks!

[blownbluez06]

you haven't set your MAF to fail. You've got it at 12khz. Set it to 0.
Engine Diag>airflow > Maf Sensor Fail High = 0

Start with that and see how it goes

[Russ K]

Your Maf isn't failed, set the Maf fail to 0 Hz. Also your truck has a vacuum referenced fuel pressure regulator, so the injector flow rate table should be flat.

And if your fuel pressure is ~58 psi, your injector flow rate table should be 48. As your VE table is very low. Why is your PE delay at 2500 rpm? It should be 0.

Russ Kemp

[s106banger]

i will try setting the maf to fail at 0hz in engine dtc's. i saw that and questioned it last night.

ill do that tomorrow, i changed the starter real quick today under warranty. and ill let you guys know how that works.

on the injectors, i had read where some guys with the intake were getting different fuel pressures. i had a supercharger on the truck and tuned it with those settings in place. the truck starts and kind of runs with those settings, so ill double check my fuel pressure to know for sure so theres no questioning it before i change it. and once i get past this starting issue...

thank you! i appreciate the help very much!

and i have no idea why my pe is set there, i must have saw it in another tune when i first got hptuners a few years ago. whoops.

[s106banger]

fuel pressure tests at 51lbs at idle, and 56lbs w/o the vacuum line. so 51lbs is what i should use for injector data correct?

setting the maf to fail at 0hz helped some, but it still took some starts to get it going. maybe 8-10.

any other tips that might help some with the starting?

[s106banger]

as soon as you clear the maf code truck wont start, still requires multiple starts.

heres whats in the truck now.
i havent changed any injector info.

thanks!

[5_Liter_Eater]

Set P0103 to MIL on first error. Verify you are seeing the code set in the scanner. If it's not starting then it's likely because your VE is too low.

[s106banger]

set p0103 to mil on first error, didnt help much.
the ecu just wont set the code.
the truck runs off this ve table, once the code is set it fires right up.
does the ve table play a part in setting the code?
it seems to fire fine when its cold, but when it warms up and clearing the code/flashing it doesnt want to fire.

had another question too, i have a crank relearn code. will i be able to do a crank relearn with the maf sensor codes there? i had read that if you have any other power train codes you cant do a case relearn.

[Nodnarb]

Are you using Ford Racing 42 lb injectors?

[s106banger]

no. factory marine 4.3 injectors that i sent to fic, they made them 42lbs.

[Nodnarb]

Try using the attached injector data. It's more than likely a lot closer to being proper than the stock values you were using.

The IFR table assumes the injectors flow 42 lb/hr at 3 bar.

[s106banger]

alright, ill give them a try.
the ifr table is for 58lbs of fuel pressure right?

[Nodnarb]

That's correct. You'll need to revisit your MAF/VE tables as they will be off.

[s106banger]

will this help set the maf codes to fall into sd mode?

i would rather get that straightened out before i start changing other things.

[Higgs Boson]

you need to change those things to properly tune your ve and maf anyways.

[s106banger]

i know.
but what if the truck wont run with those settings? ill be starting it maybe 20 times each time i change something just to get it to fail the maf. im not trying to kill another starter here.

i think i should solve my issue with getting the maf codes to set before i continue tuning right?

and im not running a maf...

[wyochimneysweep]

do you got the maf still hooked up or nothing there? do you know have the maf fail hz at 0? I also set p101, p102, p103 all to mil on first error. post your current tune you are trying to use to see the changes you have made

[s106banger]

no maf what so ever. connector cut off.

maf fail at 0hz, yes.
changed p0103 to 1-mil on second error, like bill said.

heres whats in the truck now.

[planethax]

Set P0101 102 103 to "0" set on "Mil on First report"

[5_Liter_Eater]

Bill said MIL on first error.