fixed one problem and uncovered another

Reply Subscribe

Thread Tools

Search this Thread

Jan 6, 2014 | 07:30 PM

1994F2507.3L

Thread Starter

Cargo Master

Joined: Mar 2010

Posts: 2,232

Likes: 149

From: Higginsville, MO

fixed one problem and uncovered another

So I changed torque converter and now I've got another problem. When I changed converters it dropper my 60 mph rpm to 1900-2000 from 2200-2300 so now I have a noticeable miss in that rpm range that I can't figure out. Has anyone else had that problem? It was there before but not as noticeable I guess because I wasn't in t that rpm range much. Also I did the oil cap blow by test and the cap doesn't move so no blow by. Also I have no check engine light and hpop was replaced by one of the po it says bosch on it

Jan 6, 2014 | 09:52 PM

idt-572

Senior User

Joined: Sep 2012

Posts: 207

Likes: 0

Could it be your converter trying to lock and shuddering like an engine miss?

Jan 6, 2014 | 10:22 PM

1994F2507.3L

Thread Starter

Cargo Master

Joined: Mar 2010

Posts: 2,232

Likes: 149

From: Higginsville, MO

it will do it in park no load if I hold the accelerator to 2000 rpm

Jan 6, 2014 | 10:31 PM

oldbird1965

Fleet Owner

Joined: Aug 2004

Posts: 20,421

Likes: 197

From: AZ

Seems to me that the rpm drop is because the new TC was locking when the old one wasn't. Was the trans running hot before the switch?

Jan 7, 2014 | 09:04 AM

1994F2507.3L

Thread Starter

Cargo Master

Joined: Mar 2010

Posts: 2,232

Likes: 149

From: Higginsville, MO

It wasn't running got because were in negative temps here and I have a external cooler on it but it was running at 120 where now it's at 100. I'm wondering if the miss could be related to the injector orings or cps

Jan 7, 2014 | 09:19 AM

oldbird1965

Fleet Owner

Joined: Aug 2004

Posts: 20,421

Likes: 197

From: AZ

cps is always a cheap one to try, get it from Ford. The parts store ones are junk, you should carry a spare anyway.

Jan 7, 2014 | 09:42 AM

1994F2507.3L

Thread Starter

Cargo Master

Joined: Mar 2010

Posts: 2,232

Likes: 149

From: Higginsville, MO

I have one from Ford in the glove box I just was hoping that someone had also experienced this and had a for sure fix, it seems off that it happens only at that rpm and isn't logging codes for a cps if that were it. I have access to a modis computer next week and was going to see what fuel system test I can run with it to try and isolate the problem but I won't have it until next week at the earliest I've spent quite a bit on the truck this past month and I'm just hoping it's not an injector going