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Jul 18, 2022 | 05:51 PM

#31

blacklab1

Thread Starter

Tuned

Joined: Aug 2009

Posts: 274

Likes: 4

From: British Columbia

still having issues with this truck. It starts, runs good lots of power, good acceleration. No codes no check engine light.
The only issue I have it has it has a flat spot at cruising speed regardless of what speed I'm at. It seems to "flutter".
I have limited access to diagnostic equipment, so am at a point where I'm thinking of changing out some parts hoping I get lucky.
Should I start with a TPS or Fuel pressure regulator? Any other suggestions appreciated.
97 F-250 HD 351 auto 4x4

Jul 18, 2022 | 07:10 PM

#32

torq'ta 5 8

Lead Driver

Joined: Jan 2019

Posts: 5,081

Likes: 865

From: N.W. Alabama

PITA I know, but I would remove the ECT, ACT, and physically, look at them, for crud/corrosion
Test them, when cold, and then again when at temp.

TPS->Throttle Position Sensor Testing, Replacement and Adjustment - Ford Bronco Forum
ECT->Fuel Injection Technical Library » Engine Coolant Temperature Sensor (ECT)
ACT->Fuel Injection Technical Library » Air Charge Temperature (ACT)

Aug 7, 2022 | 05:12 PM

#33

blacklab1

Thread Starter

Tuned

Joined: Aug 2009

Posts: 274

Likes: 4

From: British Columbia

Back again. I don't have the technology to test electrical components, and don't want to take it to a shop for a fishing trip.
Still have the power loss as load increases, it doesn't take much of a hill and it starts loosing power.
It has also now started to be hard to star after sitting for awhile, like it's not getting fuel.
Could this be a bad fuel pressure regulator, as it seems to be fuel related.
And still no codes.

Aug 8, 2022 | 06:23 AM

#34

rla2005

Fleet Owner

Joined: Oct 2005

Posts: 20,789

Likes: 1,753

From: Kentucky

A $30 DVM from Harbor Freight is a cheap tool to start diagnosing this problem. Rent a fuel pressure tester. Or if that is unobtainium in your remote area you will have to buck up and buy one. I made those investments over 25 years ago and those tools have saved me 100s of dollars and forehead height.

Aug 29, 2022 | 05:21 PM

#35

blacklab1

Thread Starter

Tuned

Joined: Aug 2009

Posts: 274

Likes: 4

From: British Columbia

I replaced the recently installed black ICM with a grey "Standard" products.
Truck now running fine.

Aug 30, 2022 | 06:07 AM

#36

rla2005

Fleet Owner

Joined: Oct 2005

Posts: 20,789

Likes: 1,753

From: Kentucky

I am glad you are happy that your truck is running better even though you are using the wrong ICM than what the truck was designed for.

Thanks for the update.

Sep 4, 2022 | 08:03 AM

#37

Mudsport96

Logistics Pro

Joined: Aug 2010

Posts: 3,717

Likes: 585

From: Chillicothe

Quote:

Originally Posted by rla2005

I am glad you are happy that your truck is running better even though you are using the wrong ICM than what the truck was designed for.

Thanks for the update.

As i will admit i do not know everything. BUT, as i have learned with other manufacturers over the years. Just because something is set in stone here in the States, doesnt mean that is how the trucks were built in Canada or Mexico. So it is entirely possible that his truck uses the grey ICM.
Heck we have a member here from Brazil i think, that has a 9th gen 150 with Dana 44s and i think a 4cyl diesel from the factory. So i dont assume much once the trucks are confirmed outside the Lower 48 lol.