Hot gas!

[quattrorunner]

I'm having an issue that started with a car wash.
In the past after a car-wash my car would have a miss until it dries off. I'm not sure what was causing it but grew used to this happening.
Well yesterday was the first time I washed it since the latest engine r&r. After the wash I didn't push it for a couple miles almost knowing that it would hesitate/miss/stumble/studder etc.. Not sure how best to describe it but I believe it's an ignition wet issue. And then tested the condition only to find the stumble was there but it also had high EGT too which I don't remember it doing before. And, it's not going away after 24 hours it's still the same.
So the question is what's causing this and is it because of wetness?
My coil is brand new as I was chasing a high speed miss which has cured it 85% but still is missing some.
But this is something more dramatic and has EGT cruising on the highway of like 1500-1600* just cruising and with great afr's. Fueling is fine. The High temp of the exhaust is while not missing, it feels fine but the gauge is startling. The stumble is under some boost like .4bar or so but below that level it seems fine. Feels like a loose hose but while it's missing the afr's dont really suffer oir change much. Before if I've had a hose come loose the afr's indicate that but not this time.
What is causing this?

[JFairman]

CIS or EFI?
Ignition timing correct?
High exhaust temps can be from ignition timing that is retarded too far.

[quattrorunner]

CIS
I'm thinking timing but it was like a light switch and that seems odd. I Checked the vacuum line and it's new.
What could water do to old wires?

[Norm K]

It does sound like timing, Brandon. Presume you still have a dizzy? If you do have a vacuum leak in in the line, or perhaps in the pot, the engine could certainly react as you describe and with the lack of vacuum preventing the timing from advancing an increase in EGTs would be expected.

[quattrorunner]

I'll check it out closer tonight. I only have 400 miles on a new line on it.

[Ronnie's.930]

I hear that Brandon usually enjoys having "hot gas" wafting over his person - everyone has their kink, right?!?!?!

[Norm K]

Don't stop at the rubber line - check the pot too.

Of course, you should also pull the cap and look for moisture. That doesn't go as far to explain the EGTs but might still have a negative effect on them just by virtue of poor running due to moisture in the cap.

[Ronnie's.930]

Originally Posted by Norm K

Don't stop . . . also pull the . . .

[Norm K]

^^^ You're welcome.

[infraredcalvin]

Check that the green wire isn't split or arcing. I had similar issues, stuck my hand in the engine compartment, and felt a pulsating zap. The sheath had split near the harness split and was arcing.

[quattrorunner]

Well I found a couple things.
1) was the retarded vacuum line. Yeah that's what I said.
Anyway it is new but it had enough of a split that I couldn't hold a vacuum with my tounge. Ronnie please don't read that please!!
So I cut the end a little and made sure it was a nice clean cut with no tear.
2) was the green wire. It's not bad but the plug connector was soaked. Either one of these could be a problem but I feel both were contributing to my issues. The egt was probably the vacuum advance/retard line and the stumble was certainly the green wire.
I still have a slight miss up high but it is mostly good. Dang it sure is hard to get top speed with the taller 930 gearing!! I still haven't been able to do it. In Mexico.
Thanks guys for the help

[Ronnie's.930]

Originally Posted by quattrorunner

Ronnie please don't read that please!!

Brandon, if you couldn't make the hose hold a vacuum with that 1000hp, below the nose vac pump you were born with, weeeelllllll then, that thing must have had a HUGE hole in it (like some folks I know)!!!

And taller top gear just means you need to add more powa', bro!!!

PS - congrats on the troubleshooting, btw!