341 code + Blower relay melting 30 pin -2001 w/ 250K miles
 

I had a valve stuck open on the secondary air pump injection which melted line connector, and subsequently melted a chunk out of a main wiring harness last year.

I have had an intermittent miss at cruising speeds (po codes 300, 351, 341). May be induced by bumps w/ large potholes or reduced cruising speed. Rhythmic rpm surges 1500-2000rpm. Then run fine for hours. Replaced catalytic converter. Replaced coil, and icm (not AC Delco). Fixed a drip on distributor cap from heater hose. Erased codes

I now have Cam Position sensor (341 po) and wiring connectors for coil and icm ready to install.

Replaced blower motor relay about 6 weeks ago with burned 30 pin. 30 pin burned/melted again on replacement. Installed another.

Not sure if the intermittent miss (coil - icm connector?) and blower relay melting are connected.

Feel like I need full schematics due to exhaust burning chunk of wires previously. Are the Dealer Svc manual .pdf downloads such as manuals4you.com full and authentic?

Thanks in advance

Is anyone aware of a possible link between these 2 issues? or what to check regarding blower relay 30 pin repeatedly melting? .

Thats quite the mess, i just barely avoided that on my rig, despite running with a massive pre-cat exhaust leak it still managed to punch the passenger side valve out. Luckily, i was on my home street and threw it into the driveway once i noticed.