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Jun 25, 2022 | 09:12 AM

#16

Scndsin

FTE Chapter Leader

Joined: May 2006

Posts: 12,341

Likes: 1,314

From: Central Mississippi

Glad it worked out & thanks for the report.

Jun 25, 2022 | 12:07 PM

#17

rla2005

Fleet Owner

Joined: Oct 2005

Posts: 20,789

Likes: 1,753

From: Kentucky

Glad you found the fix and reported back.

Jun 26, 2022 | 07:50 AM

#18

blacklab1

Thread Starter

Tuned

Joined: Aug 2009

Posts: 274

Likes: 4

From: British Columbia

Thanks for the help. I still can't figure out why it ran fine when it was cold.

Jun 26, 2022 | 02:21 PM

#19

rla2005

Fleet Owner

Joined: Oct 2005

Posts: 20,789

Likes: 1,753

From: Kentucky

Poor quality/aged plug wires breakdown when heated.

Open loop air/fuel ratio is also pig rich on these trucks.

Jun 27, 2022 | 07:44 AM

#20

blacklab1

Thread Starter

Tuned

Joined: Aug 2009

Posts: 274

Likes: 4

From: British Columbia

Is that something that can be corrected?

Jun 27, 2022 | 08:23 AM

#21

rla2005

Fleet Owner

Joined: Oct 2005

Posts: 20,789

Likes: 1,753

From: Kentucky

Not without a tuner. That's the way the system is programmed. Another reason why the thermactor system is designed to inject air directly into the converter to get it up to temperature quickly.

Jun 27, 2022 | 08:41 AM

#22

blacklab1

Thread Starter

Tuned

Joined: Aug 2009

Posts: 274

Likes: 4

From: British Columbia

The Cats and smog system were gone when I bought the truck.

Jun 27, 2022 | 08:48 AM

#23

rla2005

Fleet Owner

Joined: Oct 2005

Posts: 20,789

Likes: 1,753

From: Kentucky

Great, the computer is still programmed for a very rich mixture at cold start up.

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Jun 30, 2022 | 09:33 PM

#24

blacklab1

Thread Starter

Tuned

Joined: Aug 2009

Posts: 274

Likes: 4

From: British Columbia

Continuing saga.
Have been driving daily. Truck starts, runs, lots of power, shifts fine.
It seems to flatten out at about 2500 rpm. doesn't seem to be missing just seems to dog.
Step on it perks right up then when I back off it seems to flatten out again. Happens on both tanks so not thinking fuel.
Any suggestions??

Jul 1, 2022 | 07:39 AM

#25

rla2005

Fleet Owner

Joined: Oct 2005

Posts: 20,789

Likes: 1,753

From: Kentucky

Both tanks use the same fuel pressure regulator. Verify the fuel pressure at idle and under load. I do not recall if you have checked the base timing?

Jul 1, 2022 | 08:13 AM

#26

torq'ta 5 8

Lead Driver

Joined: Jan 2019

Posts: 5,081

Likes: 865

From: N.W. Alabama

2wd, 4wd?(big tires), what is gearing, on drivers door?

Jul 1, 2022 | 08:30 AM

#27

blacklab1

Thread Starter

Tuned

Joined: Aug 2009

Posts: 274

Likes: 4

From: British Columbia

3.55 gears stock tire size 4x4.
Like I said in the opener I don't have much for diagnostic equipment.
Is there a way to tell if tie engine is stock?
The belt routing sticker under the head says it for a 7.5