Strange electrical issue

[1998_K1500_Sub]

Replaced those straps as well

It's almost certainly a "spark or fuel delivery" issue. The sudden engine shut-off IMHO points in that direction.

Look at each one (fuel, spark) independently and see which is failing and causing the engine to die. Once you know (spark, fuel), debug the devices and circuits that are involved.

From memory:

- Spark: reluctor / pickup in dizzy, ICM, ECU, coil, associated wiring (including the wire to the tach) and connectors

- Fuel: Relay / oil press switch, ECU, injectors, regulator, associated wiring and connectors


The service manual is your friend. Download a copy from here:

88-98 Service Manuals

Over the years I have collected a bunch of GM service literature. Links to PDF Scans of service and STG manuals and a links to the Parts manuals. You'll need the FREE Adobe Acrobat reader to open these files. Get it directly from Adobe here {http://get.adobe.com/reader/} If you're not...

www.gmt400.com

There are troubleshooting flow-charts galore, within, but they don't cover the elusive problems.

I asked you some other questions earlier but you didn't bother to answer them for whatever reason.

Good luck

 

[bogus]

It's almost certainly a "spark or fuel delivery" issue. The sudden engine shut-off IMHO points in that direction.

Look at each one (fuel, spark) independently and see which is failing and causing the engine to die. Once you know (spark, fuel), debug the devices and circuits that are involved.

- Spark: reluctor / pickup in dizzy, ICM, ECU, coil, associated wiring (including the wire to the tach) and connectors

- Fuel: Relay / oil press switch, ECU, injectors, regulator, associated wiring and connectors

The service manual is your friend. Download a copy from here:

88-98 Service Manuals

Over the years I have collected a bunch of GM service literature. Links to PDF Scans of service and STG manuals and a links to the Parts manuals. You'll need the FREE Adobe Acrobat reader to open these files. Get it directly from Adobe here {http://get.adobe.com/reader/} If you're not...

www.gmt400.com

There are troubleshooting flow-charts galore, within, but they don't cover the elusive problems.

I asked you some other questions earlier but you didn't bother to answer them for whatever reason.

Good luck

Double-checked the ground to the back of the block. That might be my problem lol

 

[1998_K1500_Sub]

Double-checked the ground to the back of the block. That might be my problem lol

If that's the replacement ground strap, it's way undersized. The OE straps are much heavier gauge and for good reason.

What's that other thin-ish wire sharing the same bolt, is that OE?

 

[bogus]

If that's the replacement ground strap, it's way undersized. The OE straps are much heavier gauge and for good reason.

What's that other thin-ish wire sharing the same bolt, is that OE?

The OE straps that were on before were the same size. the other wire is OE. I didn't sand the surface area I just remembered

 

[1998_K1500_Sub]

The OE straps that were on before were the same size. the other wire is OE

OE straps on my '98 are about 3/4"-1" in width. Yours doesn't look that wide. Maybe it's the camera angle.

 

[bogus]

OE straps are about 3/4"-1" in width. Yours doesn't look that wide. Maybe it's the camera angle.

Dorman Ground Strap 60213
I used those

 

[docstoy]

My question would be, was the truck starting fine before changing these parts or were you chasing the issue you have now ? Many times people change parts because they think it's needed or they are changed because they think , well I'll change this part now maybe that's the problem .

 

[someotherguy]

If that's the replacement ground strap, it's way undersized. The OE straps are much heavier gauge and for good reason.

What's that other thin-ish wire sharing the same bolt, is that OE?

The TBI era stuff doesn't have monster sized braided ground straps. Those look similar to OE, to me.

Richard

 

[bogus]

My question would be, was the truck starting fine before changing these parts or were you chasing the issue you have now ? Many times people change parts because they think it's needed or they are changed because they think , well I'll change this part now maybe that's the problem .

Changing parts for the problem.

 

[docstoy]

Do you have a scanner to look at data ? Also as Road Trip stated service manual information is very helpful. I think if fuel pressure/ volume is within spec. and injector pulse and spark are good (tested wit hei spark tester) I would look at IAC . Has the minimum idle rate been messed with or adjusted ? There again specs. are in service manuals hope you've been looking at those. Not meaning to run you around cking stuff just not there to help with diagnostic thought process.