Mysterious miss

[88Racing]

To begin with I haven't had time to install gryphon or ud pullys yet.

This morning had wet slushy snow and about 30 f. Drove 15 miles went and ate lunch. Truck was parked and off. After eating went to mail letters had the truck in 4x4 and in 2nd, continued to target approx 1 mile after post office by the time I got into parking lot the engine was shaking like it wasn't firing on all 8 (no cel came on either). Parked the truck went shopping for 45 minutes. Came back out of store praying truck would start and it did, ran fine all the way home. No cel and no problems. On the way home ran it in d and 4x4.

Did something get wet and dry out?
Something else going on?

Lars

[Jackpine]

It really DOES sound like something "wet", doesn't it? Sure doesn't sound like "limp mode", not if you didn't get an overheat warning.

I know these engines are very sensitive to water in the vicinity of the plugs, but if a truck can't stand a little slush, well sheesh!

I'm sure stumped.

- Jack

[Grabber523]

Originally Posted by JackandJanet

It really DOES sound like something "wet", doesn't it? Sure doesn't sound like "limp mode", not if you didn't get an overheat warning.

I know these engines are very sensitive to water in the vicinity of the plugs, but if a truck can't stand a little slush, well sheesh!

I'm sure stumped.

- Jack

If you pulled codes on it it would probably have some in there for cylinder misfires, even though it didn't trip the CEL. Have you changed the plugs on it yet?

[88Racing]

No plugs or cops changed yet.

Only 23K on truck mostly highway miles

If the gryphon were hooked up could it pull them or does have to see them as the pcm does

Lars

[Grabber523]

Originally Posted by 88Racing

No plugs or cops changed yet.

Only 23K on truck mostly highway miles

If the gryphon were hooked up could it pull them or does have to see them as the pcm does

Lars

If the PCM see it, the Gryphon should...just because you don't have a CEL doesn't mean there aren't codes stored in there.

[Jackpine]

Originally Posted by Grabber523

If the PCM see it, the Gryphon should...just because you don't have a CEL doesn't mean there aren't codes stored in there.

Right! Go into the "Diagnostics" menu (or something like that). It should show any codes you have thrown. And - change your "Alerts" to tell you if even ONE code has been thrown. I think, the default setting on this is three codes.

Alerts is a pretty neat feature, once you get used to it and learn what should be an alert and what shouldn't.

- Jack