Tunerpro log - rough cold start 1995 7.4L

[termite]

They're somewhat interchangeable (I looked at the $OD too), like I said the $OE I have is a newer version but, it shouldn't make a difference. Here's the link to everything 7427. @EagleMark, RIP, has the $OD in this. He also has a bunch of .bins, Dave w built a spreadsheet for tuning too.

16197427 PCM Information $0D

16197427 PCM Information $0DThis PCM was used in 1994 - 1995 C/K Truck, Van, S-10, 4.3L, 5.7L & 7.4L The 16197427 came in many trucks and can run $31, $0D, $0E, $E6 mask. Click Here for thread on changing a 1227747 ECM to 16197427 PCM Pin by Pin! Click Here for long thread discussing...

www.gearhead-efi.com

I read somewhere, possibly one of the gearhead-efi threads, that the $0D vs $0E had to do with the trans 60e vs 80e. Never saw anything I took as concrete.

 

[PlayingWithTBI]

I read somewhere, possibly one of the gearhead-efi threads, that the $0D vs $0E had to do with the trans 60e vs 80e. Never saw anything I took as concrete.

Yeah, probably. I never messed with the trans side of the calibration.

 

[termite]

Yeah, probably. I never messed with the trans side of the calibration.

I'll try downloading the other and see if I find any discernible differences.

 

[PlayingWithTBI]

Oh BTW, I just thought about looking at your Malf Codes...

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[termite]

Oh BTW, I just thought about looking at your Malf Codes...

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Code 42 is new....

 

[termite]

Check your vacuum hose for the MAP sensor and check to see if there may be fuel in the hose and MAP.

I just took a look at the MAP vacuum line from the sensor to the tee. Appeared dry. Map sensor is mounted higher than the vacuum port, on flat ground anyway.

@PlayingWithTBI code 42 was on where I rechecked base timing a few weeks ago and never pulled battery to clear codes. Did so today before taking it to town and SES light is back on. Will be checking it in the morning when the sun is back up.

Will also be throwing a new acdelco egr valve at it tomorrow

 

[PlayingWithTBI]

Did so today before taking it to town and SES light is back on. Will be checking it in the morning when the sun is back up.

Sounds good - it's usually best to repair the known issue(s) before chasing unknown - obviously

 

[termite]

New egr valve installed. Acdelco via rockauto. No idea where it was made but the box had a 1995 copyright date on it. Maybe NOS?

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Reset codes for a fresh start on that and fired it off. Smooth start this time but logging it anyway. Will be taking it for a test ride down the mountain and back later after getting work done at the in-laws.

 

[termite]

Datalog file attached from startup and the short drive to my in-law's house today after installing the new linear egr valve. Didn't get a chance to take it down the mountain as I spent longer than expected playing tree service and had plans at a neighbor's house.

Anyhow, to my assessment, timing and MAP still seem erratic. I'm going to be getting stuff to hook up my fuel pressure gauge once I figure out the fittings necessary to do so, and have the cash to purchase them.

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[grampadirt]

Looks to me you have a problem with the O2 sensor.Your engine doesn't go into Closed Loop until the 24 minute mark because the O2 sensor doesn't start acting like it should until then.If you jump to the 24 minute mark and select O2 sensor,vehicle speed and engine speed you'll see it all wakes up.Anyway that's what I see.Looking at a couple of my data logs mine is much different.