OT: Truck Won't Start in the Morning, "Cold" Start Issues Options

[Nogoodwithusernames]

Way off topic I know, but this forum is also WAY better than others that would maybe be more appropriate for this.

I've got an Isuzu Hombre '98 4 cylinder pickup. It does have a bit over 200k on the odometer, but it runs good. This last winter it started acting up not wanting to start in the morning. I'm in CA so morning temps can range from 30°f upwards just depending on weather.
It has gotten steadily worse where to now it won't even start when it's 50° outside.

I have tentatively narrowed it down to lack of spark, it will crank and crank and crank but not fire. A timing light on a spark plug wire while cranking will not flash.

I started with new coils figuring those might be going bad and not wanting to fire when it's cold out. No dice.

I am also getting codes for cam and crank sensors (as well as codes EGR valve and low efficiency on CAT, though I believe those are unrelated to the no start, and I believe the one caused the other so I cleaned out the EGR and made sure it was moving freely and seated okay, and have some BG 44k in the tank to help clean things out)
Anyways replaced the cam and crank sensors with NTK brand and it started two mornings in a row, and now won't start in the morning again.... Temps were all about the same all four mornings.

It will start just fine later in the day though.

Of course with all of this registration renewal is coming up and it's a SMOG year (IMG:style_emoticons/default/headbang.gif)

Any troubleshooting tips would be appreciated since it feels like I'm (IMG:style_emoticons/default/dead horse.gif)

[r_towle]

At 200k with no spark I would ask a simple question.
What system tells the coil pack to fire?
A combination of crank sensor, some distributor, and wiring.

No spark at plug while turning over…
Back up…is there power to the distributor?
Is there power to the coil?
Does the distributor tell the coil to send voltage? How and check that is working.

The last thing I would even consider is the ECU on a car with 200k on it.
Old wires, corrosion, worn out parts etc.

At the end of the day, you are sending voltage to a spark plug at the proper moment…..figure out what part of the electrical system is no longer doing its job

Djet is a fuel deliver system….nothing todo with spark at the plug