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  #21  
Old 09-12-2019, 03:26 PM
rang-a-stang's Avatar
rang-a-stang rang-a-stang is offline
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Join Date: Oct 31, 2016
Location: Camarillo, CA
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Quote:
Originally Posted by babywag
What is your FP set @
Did you change the injector flow rate in .bin to match your injectors @ that FP?
If the value isn't correct the pcm calculations for fuel will be wrong.

It appears to be rich, but without seeing the logs or the fuel trims just a guess.
You might want to look @ INT & BLM in monitor to see what's occurring ~backfiring?

Before significant changes to fuel map as I suggested a couple times already force it OL and see how it runs.
Fuel pressure is at 12psi.

Yep, bin is set to same flow as injectors.

I look at BLM and INT while I am driving and did look at them in the history graphs. They are better for the 401 bin than the 454 bin but I don
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  #22  
Old 09-12-2019, 03:26 PM
rang-a-stang's Avatar
rang-a-stang rang-a-stang is offline
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Quote:
Originally Posted by babywag
What is your FP set @
Did you change the injector flow rate in .bin to match your injectors @ that FP?
If the value isn't correct the pcm calculations for fuel will be wrong.

It appears to be rich, but without seeing the logs or the fuel trims just a guess.
You might want to look @ INT & BLM in monitor to see what's occurring ~backfiring?

Before significant changes to fuel map as I suggested a couple times already force it OL and see how it runs.
Fuel pressure is at 12psi.

Yep, bin is set to same flow as injectors.

I look at BLM and INT while I am driving and did look at them in the history graphs. They are better for the 401 bin than the 454 bin but I do not really understand it or what is “good” or “off” so I don’t pay a lot of attention to it yet.

Yep, gonna drive with O2 sensor unhooked and log. First I am going to check my dizzy phasing, then take for a drive with O2 unhook
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  #23  
Old 09-12-2019, 04:21 PM
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babywag babywag is offline
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Quote:
Originally Posted by rang-a-stang
Fuel pressure is at 12psi.

Yep, bin is set to same flow as injectors.

I look at BLM and INT while I am driving and did look at them in the history graphs. They are better for the 401 bin than the 454 bin but I do not really understand it or what is “good” or “off” so I don’t pay a lot of attention to it yet.

Yep, gonna drive with O2 sensor unhooked and log. First I am going to check my dizzy phasing, then take for a drive with O2 unhook

In CL BLM & INT should be ~128
Anything under 128 the pcm is pulling fuel over 128 adding fuel.
Cannot tune VE tables without them.
Need good data to get in ballpark.
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
1994 Caprice wagon
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  #24  
Old 09-16-2019, 12:58 PM
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rang-a-stang rang-a-stang is offline
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Quote:
Originally Posted by babywag
In CL BLM & INT should be ~128
Anything under 128 the pcm is pulling fuel over 128 adding fuel.
Cannot tune VE tables without them.
Need good data to get in ballpark.
Ok, that's what I assumed but wasn't sure. I did use them for the VE tables but plugged them into the excel spread sheet and it did the computations.
*********************************
IT'S "FIXED"!!!! It was distributor phasing!
Sorry the pictures are so bad. It's pretty hard to get these pictures. I basically video'ed them and screen captured it.

Here it is with the timing plug pulled (timing at 0 degrees):


Here it is at idle with the timing plug in (so timing is at 20 degrees advanced). With the spark that far over, I don't know how it even ran at max timing!! I should have had LOTS of mis fires and back backfires.


I pulled my dizzy, brought it into the garage and unscrewed the pickup lockdown screw. I marked the location of the #1 stud on my cap adapter and rotated it so when the star wheel and magnetic pickup were centered for #1, the rotor tip was just passed the stud. This would mean that at 0 degrees, the spark should be on the trailing edge of the rotor. This moved the pickup about 10 degrees so I screwed it back down.

Here it is after moving the pickup. This is idle at 0 degrees timing:


And the best picture! At 20 degrees of timing, it's pretty much centered.


I took it for a spin. Did my normal route, with 401 tune. I did not data log because I didn't feel like grabbing my laptop and booting it. Got up to 70, eased of the throttle.... NO BACKFIRE!!!!! WOOOOoo HOOOO!!! I got off the freeway, headed down run 3 and cruised at 50, NO BACKFIRE!!!! I was feeling pretty triumphant as I turned at the gas station heading toward home.... then it stalled. I cranked it over, no start. Are you 'ing kidding me?!?!?!?! Fuel pump died. At least it doesn't backfire anymore.
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  #25  
Old 09-16-2019, 02:15 PM
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posulli88 posulli88 is offline
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Thats Awesome! Congrats on figuring it out, nothing better!
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  #26  
Old 09-16-2019, 03:16 PM
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  #27  
Old 09-16-2019, 09:27 PM
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Full Size Jeeper Full Size Jeeper is offline
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Location: Mandeville Louisiana
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Glad you have it figured out
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1978 Wagoneer

401/turbo 400 trans. Quadra-Trac BW1339 (with Low) 4" Rusty's lift with 31" Summit Mud Dawgs

Mods:
Fuel Tank, Red Holley Fuel Pump, Razor Grill (profile pic out dated), Rebuilt steering box
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  #28  
Old 09-17-2019, 05:06 AM
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chubbinius chubbinius is offline
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Join Date: Oct 31, 2018
Location: San Diego
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Those are two of the greatest words to hear...bet you're smiling from ear to ear...hopefully the fuel pump will be a quick swap.
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Last edited by chubbinius : 09-17-2019 at 12:46 PM.
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  #29  
Old 09-18-2019, 08:27 AM
johnsonic johnsonic is offline
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Join Date: Mar 12, 2015
Location: Oregon
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YASSSSS - victory! Congrats!
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1984 GW
360
Comp 260H
Magnum Roller Rockers
Wiseco -21cc Forged Pistons
Performer Intake
Holley SA 670
MSD 8523
Dakota Digital custom cluster
Serehill headlamp harness
NWMP aux tank

1987 GW deceased
...but the parts live on
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  #30  
Old 09-21-2019, 07:44 PM
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PlasticBoob PlasticBoob is offline
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Location: Long Beach, CA
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Great job! Now go crank trigger with LS coils.
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1974 Cherokee S, fuel injected 401, Trans-am Red, Aussie locker 'out back'
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The Southern California FSJ forum
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  #31  
Old 09-22-2019, 11:24 AM
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rang-a-stang rang-a-stang is offline
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Hahahaha!!! Funny you mention that! Probesport did a thread on it and I almost bit on doing it during my rebuild but decided I was getting side tracked. I would love to go distributor-less but I have so many other fishes to fry before I do.
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