Noah1167
Newbie
How about cap, rotor, plug wires, spark plugs, PCV valve? Have you verified the initial timing, electronic spark advance:Means NOTHING. Cheap replacement parts may be worse than the OEM parts you removed. And you can replace the sensor a hundred times and not fix the problem if the problem is a broken wire or corroded connection in the wire harness going back to the computer.
How about cap, rotor, plug wires, spark plugs, PCV valve? Have you verified the initial timing, electronic spark advance,
, EGR system, AIR system (if used.)
Have you looked at the magnet on the distributor mainshaft? Common for them to crack, generally where they're riveted.
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First Guess: NOT a scan tool, it's a consumer-grade "code reader".
"Code readers" are one step above useless.
You need a REAL scan tool, or a cable/dongle/software/laptop computer scan tool substitute. Note that I do NOT favor the scan tool substitute, I merely recognize that they're popular and dirt-cheap.
Clear them, see what comes back. Get concerned about the ones that return.
Download the Genuine GM service manual set for your vehicle from the links posted in the Sticky section of the Engine forum. Follow the diagnostic procedure for each code that returns.
TBI is simple and generally reliable. If you think TBI is complex, wait until you start dealing with newer vehicles.
Is the exhaust system REALLY quiet? Maybe the catalyst is plugged, and it takes 30 seconds to build up enough back-pressure to stall the engine.
I have replaced the entire ignition system. New plugs, new wires, new distributor. New ignition coil. new pcv. new egr. new egr solenoid. I had a tech at a local shop come out and do the timing. Might be something i need to double check.
For the egr system i do not have the canister set up. i have that venting to the engine bay.
For A real scan tool i did look around the website to find one and settled on a program i use with my laptop but have been having issues setting it up. Also have a chevy obd1 dongle for it. Not a computer wizard but i will try and get that up and running for better data.
Did download a service manual that was posted on the website. Will try and complete those diagnostic procedures and post my findings, thank you.
The truck has a pair on long tube headers installed on it. Going to a single 3 inch exhaust and one muffler. i used a walker muffler. The exhaust system has just been done. It all new except for the long tube headers.