After some mechanical work, I was letting the camaro (350 with LG4 ccc-qjet) warm up to readjust carb/dwell etc. Dwell meters hooked up and she's reading steady while the engine warms then the rad fans come on and I'm ready to play with the mixture screws when the dwell meter goes to zero and the engine idle quality drops. M/C solenoid is not clicking and I check and the 10 amp Engine Control fuse under the driver dash is blown. Replace it and turn the key to on and it blows again before the M/C solenoid can click.

I'm going to hit it fresh in the morning and was hoping someone had some advice on what to check first. I had the valve covers off so all of the sensors to carb/etc. were unplugged then plugged back in. She ran for 15 minutes or more before the fuse blew as I had to adjust valve lash before adjusting the carb.

Any of you guys ever been here before?

 

I haven't seen it before, but I'd check for a wire pinched under a valve cover.

 

Found it right off..EGR plug had fallen out and melted onto the hedders. Took me five minutes on a wiring diagram to see that the EGR and Air controls went through this fuse, both of which are no longer connected on my camaro. I tucked them back into the harness hose and zip tied them.

SOMETIMES it's the simple things.

Thanks for the reply, at least someone out there cares.

 

Or, you might check for a now-unused wire hanging down and shorting out to something like the exhaust. . .

Glad you found it. Yes, sometimes the simple things can be the most frustrating and overlooked. Personally, I need to trace down a starter solenoid power problem that keeps the starter from engaging when the engine is warm. For now, I rigged up a switch under the hood that goes directly from the battery cable to the starter - cheating, but effective.