Once again, no start when hot.

[DeCaff2007]

Thread title says it all. 89 5.7L 5-speed. All research says ignition module in the distributor. This is the 3rd distributor in a month.

I thought I had the problem solved (hence, the third new distributor), so I drove to a reputable alignment shop to finally get that done. They called me an hour later and said the truck won't start. It'll crank until the cows come home, but no start.

Don't know what else could possibly be the issue here.

Any last suggestions before I have the damn thing towed home?

 

[Schurkey]

Verify no spark.

Look for injector squirting

 

[DeCaff2007]

Well, I got a ride to the alignment shop and made it there JUST in time to get the keys. Went out and cranked it. It's just about ice cold. Still no start and it sounds like there's no spark. I don't have time right now to go digging into it at the moment.

I'll head back tomorrow morning and see what happens.

 

[GoToGuy]

Start with basics. Anybody can miss something small. Research as in net answers from the void? Any testing using a scanner? Any codes from diagnostics? Any reference to FSM guidance for no start conditions?

 

[DeCaff2007]

Start with basics. Anybody can miss something small. Research as in net answers from the void? Any testing using a scanner? Any codes from diagnostics? Any reference to FSM guidance for no start conditions?

Well, all the above, including some advice from my FIL.

Anyway, went back to try starting it again after dinner - except I put an HEI spark tester on the number 1 cylinder. Fired RIGHT up. The spark tester showed a white but steady spark. Shouldn't it be blue?

Turned it off, put the wire back on, started it up, and drove it home without issue.

Once again it goes on the back burner because the rear diff on my daily decided to grenade today. THAT now takes priority. No warning at all. It just exploded out of nowhere. Fortunately, I've built several GM rears with much success.

 

[Schurkey]

If it weren't for bad luck, you'd have no luck at all...

What vehicle? What axle?

 

[DeCaff2007]

If it weren't for bad luck, you'd have no luck at all...

What vehicle? What axle?

Truth.

06 Silverado. 10 bolt rear. I'm not even sweating it.

Just trying to decide if I want to go to the yard and pull JUST the gears/carrier/etc..., OR, do I want to find something wrecked and swap the whole axle over.

 

[0xDEADBEEF]

It reminds me of vapor lock. Are you running a mechanical fuel pump and carb?

 

[DeCaff2007]

It reminds me of vapor lock. Are you running a mechanical fuel pump and carb?

I'm sorry, what? GMT400's don't have carbs, nor mechanical fuel pumps.....

 

[0xDEADBEEF]

I'm sorry, what? GMT400's don't have carbs, nor mechanical fuel pumps.....

I know they didn't come that way from GM, that's why I asked.