What's new
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.

Yank Tank Molotov/3+3, 454/magnum/Allison

'84 K30 Silverado "big Dooley"
Overview Gallery Discussion
ZooMad75 said:
What I say may come off harsh, but no offense is intended. Why throw the baby out with the bathwater?

The engine and trans are already in there. The problem needs diagnosed. Unfortunately you don't have some of the items needed to do that diagnosis so it gets into a frustrating game of changing one part after another and still having problems.

For all we know it could be a wiring issue but without proving that with a solid diagnosis that is another shot in the dark. You can't tell Howell what is wrong if there is a potential wiring issue without proving it.

It's frustrating as all hell. Sometimes my techs get into the same mode of chasing parts and I end up stopping them and force them to focus on the diagnostic process and prove they need what they want me to sell.

Going through that process isn't easy and is almost impossible if you don't have access to a tech 2 scan tool or a high level aftermarket tool like a snap on Solus or similar. There is data you need to see that is more than reading codes. Trying to do diag without something like that is like putting a puzzle together you don't have the picture of.

If you were closer I'd take it on for sure. I can copy anything you need from the service manual and send it your way. But it's going to take some serious diag time to get to the root of the problem.
Click to expand...
I've my buddy put his high end snap on scan tool on it a ways back and we had issues like no communications from tps I forget the # and p0650 general high voltage maybe one or two other issues basically dealing with communication.
It was then I changed out the throttle body/tps in hopes of clearing up IAC issues and installed a new Tac module to match the throttle body. From there everything smooth out. Only issue was the pedal would travel out of range but it seemed to learn a bit past that on my way home about 100 miles in it started dropping cylinders. 30 more miles felti may have only been running on 4 or so as I limped home.
I don't understand why it would start running better before it got worse than ever
 
SpeedlabDan said:
I've my buddy put his high end snap on scan tool on it a ways back and we had issues like no communications from tps I forget the # and p0650 general high voltage maybe one or two other issues basically dealing with communication.
It was then I changed out the throttle body/tps in hopes of clearing up IAC issues and installed a new Tac module to match the throttle body. From there everything smooth out. Only issue was the pedal would travel out of range but it seemed to learn a bit past that on my way home about 100 miles in it started dropping cylinders. 30 more miles felti may have only been running on 4 or so as I limped home.
I don't understand why it would start running better before it got worse than ever
Click to expand...
You are kinda proving my point. Communication codes, dropping cylinders, something is up. Could be a ground that's gone or a poor connection somewhere. It's entirely likely that you did address the throttle issue, but now have something different going on. The throttle system won't have anything to do with causing a cylinder to stop firing an injector or coil for spark. But there are circuits that are common to each bank of injectors and the coils. Loose one of those and you'll drop a whole bank.

Until you plug in again and see what the system is unhappy about you are flying blind. I get the frustration. But if it was mine I'd be inclined to figure it out vs dumping the 8.1 for an oil burner or a carb'd 454. I'm a cheap SOB too so I'd see all the money I put into it go out the window and I would go back to figuring out the problem.

I don't mind helping at all but right now there isn't enough detail to point you in any particular direction.
 
Unfortunately I really don't have the resources to diagnose the problem. I have however found a used fuse block and interior harness from an 84 suburban. I plan on pulling the fi harness and going through it completely and checking everything before I even plug the ecu back in. I need to take the chance of me wiring wrong or chaffing something out of play. The fuse block in the truck now is missing a few circuits and just about all the column wiring was completely melted together when I got the truck. I purchased a new column pigtail an butt connected it in place the best I could but there's a lot of chance for failure there even tho it has nothing to to with the fi harness I don't know if something is still grounding out. I don't have delay wipers/washer and who knows what else. The whole system could be back feeding for all I know there's still some variables I can try to eliminate still
 
It looks bad bc the stock trunk has been split open to replace the wires that have been overheated. Most of the wires were melted together and before I found the replacement I repaired what I could. That's the stock count of wires in a power window/Ac truck with tilt column.

This is how you eat an elephant. One bite at a time.
 
Everything is removed, I gotta transfer the blinker wires for the dakota and tie up the extra wires from the ecu that aren't being used somehow. This block is from an 84 suburban w/pwr windows supposedly so I would think it would be identical but it's not possible bc it's a diesel harness originally. The buzzer/relay and other flasher are on the bracket not clipped to the side of the block like og. Anyone know where it goes?

20201007_172037.jpg

20201007_172125.jpg

20201007_174300.jpg

20201007_174306.jpg

20201007_175641.jpg
 
bracket in hand bolts to the pass side of the brake pedal hanger bracket unit between it and the gas pedal .

2 point thread starter bolts .
 
sweetk30 said:
bracket in hand bolts to the pass side of the brake pedal hanger bracket unit between it and the gas pedal .

2 point thread starter bolts .
Click to expand...
Thanks Bret I was kinda thinkin that would be the only real estate once all the heater ducting goes in
 
Plugging away at this... Fixed the blendoor, everything is falling in place with the exception of these two plugs... I marked everything on the way out and tgere aren't corresponding ends to plug into. There aren't any on the old rats nest either. Unfortunately I can't remember if I actually unplugged them:dunno:

20201021_175519.jpg

20201021_175615.jpg

20201021_175623.jpg

20201110_170017.jpg

20201110_170036.jpg
 
Those don’t look like tacos

sorry I’m of no help today
 
Gettin a little ahead of myself when I still don't know if this pile runs but while I'm in this deep in the wiring I have the 4 labeled wires from the ecm/Howell harness and the new turn signal stalk has the cruise control wiring lead. My buddy works at American Autowire, he's gonna get me the wiring diagram /color code for our squares. I'll post it up here and in Larry's resource thread.
 
So here's some "custom cruise 3" info for potential hookup to the vortec harness. Howell included the 4 tagged wires pictured for use with cruise. A good friend of mine I graduated with is part of American Autowire out of Bellmawr NJ near me who provided me with the schematic and some insight for the gm Sq body side of the controls.

Pictured is also the plug sides of the stalk to factory harness plug that will be used to splice in the efi side.

Red- set/coast
Green- brake input
Yellow- resume/accelerate
Blue- 12v ignition

The cruise options were offered by third party so color codes changed to the plug side which go as fallow:

Grey to green
Red to dk blue
Yellow to dk green
Blue to pink

From there the green, dkblue, dk green, and pink are spliced to the corresponding four wires from the efi harness.

Unfortunately, in theory this will work but I can't test it yet.

received_701762737192892.gif

USER_SCOPED_TEMP_DATA_MSGR_PHOTO_FOR_UPLOAD_1605105876154_6732301996780361460.jpeg

received_411222603379418.jpeg

20201111_122810.jpg
 
You must log in or register to reply here.

Latest Posts

Top Bottom