88 blazer 5.7. No start

[Waynemck]

First timer here. I have a 88 blazer 5.7 tbi. Was driving the other day and idle came up after putting seafoam in tank. Pulled in driveway shut off went back out 10 mins later to pull in garage it started fine went to back up it died. All it would do is click, jumped starter to make sure it wasn't locked up, Found a loose wire on starter fixed that. Now it Turns over fine but no fire. I have put new ignition module, new coil, new plugs. I checked spark at plugs I have that. I have checked to make sure I'm getting fuel. I have checked TDC to make sure the timing didn't change. As far as I can tell timing is still on. I have also test light the wire out of the coil to make sure they are sending signal from distributor to coil. I'm at a complete
Loss on what this could be.

 

[scouthead]

fusible link? i believe one round of jump starting did mine in years ago... took a while to figure that out. the link looked fine on the outside- felt a little crunchy when flexed. I finally worked up the nerve to cut it, and the wires were charred on the inside, but insulation looked fine on the outside. spliced a new one back in there, and back off I went to break something bigger and better.

-edit-
meh- after reading your post again, you have a list of things still getting power and working, so probably not the fusible link

 

[Waynemck]

fusible link? i believe one round of jump starting did mine in years ago... took a while to figure that out. the link looked fine on the outside- felt a little crunchy when flexed. I finally worked up the nerve to cut it, and the wires were charred on the inside, but insulation looked fine on the outside. spliced a new one back in there, and back off I went to break something bigger and better.

Where is the fusible link at. I've been over about all the wires. I've checked all fuses that I can find underhood and dash

 

[scouthead]

Where is the fusible link at. I've been over about all the wires. I've checked all fuses that I can find underhood and dash

I may be getting my toyota fj55 fusible link and my 1988 K5 fusible links confused, but it was either:
-right off the starter,
-or in line with the charging wire from alternator to battery
- or on the firewall above the motor (engine bay side- not dashboard side)

And there may be a couple of them. hopefully someone else can jump in here and help pull my foot out of my mouth

 

[scouthead]

you may have something that looks like this connected to the starter - if that one burns up, im pretty sure most of the things you were checking for power/spark would be completely dead.
also, if you have the bus / power distribution block on the firewall? good chance you have one or more there as well.

 

[Waynemck]

you may have something that looks like this connected to the starter - if that one burns up, im pretty sure most of the things you were checking for power/spark would be completely dead.
also, if you have the bus / power distribution block on the firewall? good chance you have one or more there as well.

View attachment 423622

View attachment 423623

Yeah I have checked both of them and have power to all things.

 

[dyeager535]

Check your fuses. Especially your ECM ones. But I'd check all of them.

 

[Waynemck]

Check your fuses. Especially your ECM ones. But I'd check all of them.

I have checked all fuses all are good

 

[dyeager535]

http://67-72chevytrucks.com/vboard/showpost.php?p=5621043&postcount=1

Download your year service manual there, there will be flow charts to follow for a crank no start condition.

If it ran before, and you haven't messed with distributor position, I would leave that alone, especially if it seems to line up properly at TDC.