Typical wet cold weather No Start Condition

[JDWX]

97 Yukon 5.7

As the title suggests, I'm experiencing the wet cold weather no start. Technically, a rain in the summer doesn't cause the issue. It's usually colder weather, or a temp drop, when condensation forms in the engine compartment I imagine.

No Codes, and coolant temp sensor reads properly

I've experienced it before, kept it at bay over the years by the typical replacing of plugs/wires/ cap/rotor (in some order). Which usually addresses issue. I've also done the TSB for a change in plug wire position / arrangement.

Right now, the plugs, wires, cap and rotor are a less than year old (and have hardly been driven), all AC Delco. But, the truck has been sitting on dirt all summer and rarely driven. So, corrosion may have started. ?

It even has a new (changed this spring) reman distributor as the old one was knife edged at the gear and was changing timing from the wear.

Anyone else experienced this and found a long term fix? Different brand parts, etc etc...

Thoughts? Input?

Thanks!!!

 

[SunlitComet]

corrosion from condensation sitting so long. try cleaning them up this time. then drive it more often.

 

[JDWX]

Sounds like a plan, was gonna just replace, but, hate to spend when cap/rotor are "reasonably" new.

Sorta worried something carbon tracked and might just keep doing it clean or not. But, it's a free step at least. Will yank cap rotor and examine.

As for parts.... AC Delco the brand you'd stick with? So far so good for me, other than this area, which is notorious anyways.

I feel silly asking about what is basically common sense stuff, but even though I consider myself fairly schooled on stuff, this is driving me batty. Never know when someone may have found a better way....

 

[SunlitComet]

if stock then use acdelco

 

[Phone Man]

TSB for a change in plug wire position / arrangement? What is the TSB number or correction?

 

[JDWX]

Trying to find it in Alldata and am not seeing it, I'll keep searching.

I found it last year "somewhere" while searching for a weird shudder/miss at highway speed under slight acceleration/load , that I was blaming on TCC but had no 1870 code, turns out my distributor gear was knife edged and was causing a weird timimg issue under certain conditions.

I would figure I had found it on Alldata, otherwise I'd think I would have saved the diagram on the PC had I found it online... Hoping I have it printed out somewhere in my garage. Been looking two days now on alldata and it's driving me nuts... I'll keep looking.

 

[SunlitComet]

On the Vortec 5.7l engine there is no TSB regarding a change in wire routing.

 

[JDWX]

Yeah, not in Alldata I gues, I'm still racking my brain where I found the updated wire routing that I had printed out and distinctly remember using.

Thought today it might have came off of a site like MSD (as I once used a set of their wires trying to chase down the misfire issue), but no joy.

I seriously remember it being printed not unlike a TSB. Basically to alter two wires running near or over each other. I seem to remember about running across as so not to cause inductive crossfire. This is absolutely driving me mad, lol... Even tore my garage apart trying to find what it was.

Not stored on my PC that I can find, and I'd likely have saved it... Hence making me think it was on my Alldata. But, again, no joy...

Still looking for whatever it was

 

[SunlitComet]

Maybe it was a moment. However there is an alldata/service manual entry pic that does show how it should be all the time. just not a changed routing one.

 

[JDWX]

lol! Unlikely, but, I'm almost wondering if I didn't dream it! I was anguishing over that vehicle for months and months.

I've certainly looked at the two Alldata routing diagrams enough too, haha... Hmmm...

I cleaned the cap etc, it was slightly corroded, but not bad to where I'd immediately suspect.

But..... Another misty and rainy day here, Will see later if it starts. I have a new AC Delco cap and rotor coming for 40 bucks off Amazon. With winter coming quick, it has to be reliable. :-/

I've read a little bit about the coil and driver being susceptible to damp conditions... The two things I've NOT replaced.... lol...