Rolls over, no start

[buddha131]

Make

GMC

Model

Sierra C1500

Year

1988

Miles

190,000

Engine

350

Driving home at 30 mph truck just stopped running. Fuel pump was humming, changed fuel filter, sprayed starting fluid in the throttle body. No sign of spark. Replaced coil and electronic ignition module. Still not starting, Need help?

 

[billr]

Have you checked for spark at the coil? Have you removed the dizzy cap to see if the dizzy/rotor is turning as you crank? You have changed the coil and ICM, but the pick-up coil/reluctor is also part of that system and may need attention. Before throwing any more parts at it, though we should get you to do some electrical checks at the ICM connectors. Do you have an electrical multimeter?

 

[buddha131]

Yes, have multimeter, set too 2000 ohms?

 

[billr]

There will be several different volts and ohms ranges needed; but yes, I expect the pick-up coil in the dizzy should be about 2000 ohms. We can get the specific number, and details of various tests. First, though, do those easy things, make sure the dizzy is turning and that there is no spark right at the coil terminal.

 

[jigfeett]

Those years of chevy had issues with the caps a simple tuneup is where to start unless you know all is good. Cap rotor, plugs, wires.
Post your fix for us

 

[grcauto]

Here's your diagrams.

 

[nickb2]

OMG, which I think means oh my god.

You actually have those books, wow, and you took time to picture them,

well, I just want to say, what a great start to this new year.

I am, and repeat, I am really impressed. What a gift.

 

[nickb2]

if I had to choose between a vintage playboy and this, yeah, this is my head turner.

My sister used to read some rumour magazines, I would be reading hot rod magazine

 

[nickb2]

ok, have to say it, my mom thought I had porn mags under my bed, nope, I was looking at that cool new grand national turbo.

Never had one, and when I first went to see one.

Well santa never came through.

 

[nickb2]

anyway, as usual, take way too long to say just ONE thing.

Thx all, if it wasnt for this site, I would in some jail. Random

 

[buddha131]

Those years of chevy had issues with the caps a simple tuneup is where to start unless you know all is good. Cap rotor, plugs, wires.
Post your fix for us

All that was done 6 months ago, rotor does turn.

 

[billr]

Did you check for spark at the coil itself?

 

[Mobile Dan]

Is the coil inside the cap?
Use the schematic (third one) to check out wires at distributor and cap.

 

[buddha131]

Module under the distributor cap was bad, corroded, problem fixed. Thanks bat auto guys! The esc module I put on, fixed the Hi idle at start up. My front brakes said thank you.

 

[billr]

"Replaced coil and electronic ignition module."

That is from the original post. Was the replacement ICM bad?