Cold start haze and rich smell from exhaust

[MorganY]

4C2Z-12A690-BA and 4C2Z-12A690-AB

Harnesses

 

[Mdub707]

Have you bothered to test the glow plugs to see if they even need replacing, or are we at the point we're going to throw parts at it?

Diagnose, verify, repair...

FWIW, I have a few FICM's on my shelf that read a perfect 48+V at all conditions, but the truck runs like absolute garbage.

To me it sounds like your FICM is having issues, if the voltage is jumping around like that.

 

[Mdub707]

To test glow plugs and glow plug control module:

Disconnect the 4-pin connector at front of valve cover. Measure each glow plug resistance to battery ground. Glow plugs should read .1 to 2 ohms. Measure engine harness resistance to GPCM that should read 0 to 1 ohms.


Also, how are the batteries? Have they been load tested recently?

 

[Borcht Warrior]

not throwing parts at it yet, just calling around for some pricing on parts.

 

[reilly8282]

any results after this? did you do the GPCM and harnesses and plugs? Thanks Reilly

 

[Jeremyleggett07]

I had tremendous results by switching to. Valvoline premium blue with Ar9100

 

[reilly8282]

I run Mobil 5-40 synthetic and archoil fuel and oil additives but still in weather 50 or below i get the unburned fuel haze until EOT and ECT's are about 115* or so.

 

[Borcht Warrior]

any results after this? did you do the GPCM and harnesses and plugs? Thanks Reilly

Not yet, I found that my FICM is on its way out, I have a new one just go to put into the vehicle in the morning.