I've been scouring this site for weeks to find an answer to my problems. It seems I have a common problem but there's never a resolution to the posts I've read through.
So I decided to join and see if I can get some help figuring this thing out!
My 322 has been cutting off after 5 to 10 minutes. It runs great until then...but won't fire up for half an hour or more after it dies
Here's what I've accomplished so far while inspecting and troubleshooting
replaced the pick up tube and filter in the gas tank (it had fallen off and cracked into pieces)
electrical testing for spark , cold as well as after it dies, has spark both scenarios
tested transistor module, honestly don't know what my readings mean as they are quite different from the manual (I know about the old analog meters the manual was written around and mine is a digital one)
repaired quite a few bad connections in wiring coming of the rectifier
replaced the fan belt, thermostat, and a radiator hose- unrelated to my issues but needed to be done
have a fuel pump on its way to replace , mine sounds good but after it dies the pump is considerably quieter and maybe suspect
replaced fuel line from pump to carb, and inline filter
the transistor testing also was not done immediately after it died, which is probably the best time to test it but a little impractical
it does have 12v at all coils after it dies
It does turn over so I don't suspect a safety switch, which is bypassed
Wow that thing is hard to get to, must have been the first thing they installed when it was built. It looks brand new, I was hoping to see some sign of over heating or something. Wires were pretty crimped going into the box.
Most likely either a connection issue grounds or plugs that warm up and break connection due to corrosion, find the grounds clean and apply dielectric grease, then check the plugs (both sides) for the TDCM. If you rule that out and maintenance done for possible corrosion, then it points more than likely back to the igniter control box (aka Transistor module). This has been on the different forums this year more than usual this year.
The transistor module pickups pulses from the pulser(3) located around the flywheel and amps the voltage/current and then switches on/off the power applied to the coil which produces spark at the spark plugs.
From the chart with the reading of resistances you provided, are way out of range. So please go back and measures again. A pic of your meter and setting for the measuring for upper right chart and the lower left. That way we can help you with the possible operation of the meter if some thing does not seem right with the meter or its operation.
Last edited by bloodrunsgreen; 12-26-2018 at 10:30 PM.
Haven't been able to do much until today...
I've held off replacing the fuel pump as it really doesn't act like its running out of fuel, have one on hand just in case.
Got it all back together after replacing the fan belt, thermostat. Cleaned all wiring connections, grounds are good. I even picked up a used tdcm module on ebay and swapped it (that was fun). No change still. It reliably dies after about 10 minutes, won't fire again for half an hour or more.
I got the transistor module unbolted for a quick removal after it quits this time and brought it in immediately to test it with the multi meter.
Also took pics of my meter and took measurements on 2K and 200K settings for resistance.
I hope so, I ordered a new one ,it'll be here tomorrow.
So which setting should I have been using for resistance?
For resistance that was on the chart, since it is above 2K your meter should be set to 20K not the 200K, which sets the voltage bias(applied) for the best reading of resistance. Except for where it goes above 20K then 200K would be appropriate (ie the second line from the bottom which has readings above 20K). In the second chart, because you had 2K set the readings from the meter show a lot of out of range displays. But you did all right, not bad for being a NOT guru at electric/electronics/test gear.
Last edited by bloodrunsgreen; 01-02-2019 at 06:12 PM.