He is not seeing any movement of the tach needle when cranking. Therefore, no tach signal from the coil, and if no tach signal, no fuel injected. The ground path from coil - goes to a branch. One branch goes to LC filter and then to tach. Other branch goes to power transistor, which is switched by ecu to a ground point. Wire from coil - is white/blue to PT, and path to ground from PT is a black wire.
If I've read his posts right, he's tested the PT, TDC and crank position sensors in dizzy, coil, and sees no spark. The ecu has been rebuilt. I'm wondering if the ecu is really good after the rebuild. I'm also wondering if the ecu just needs a reset.
Try:
1. disco the battery - cable for 30 sec and reconnect. Try to crank it.
2. Check the wiring from coil to LC filter (little square thingy under the coil bracket - note if wires are brittle) to power transistor - the white/blue stripe wire.
3. redo the power transistor test and also test the following - see if the white wire to the PT has a pulsing 5v signal when the engine is cranking. Do this test with the connector attached. This will test if the ecu is controlling the PT.
1) No change. No longer getting "TPS, etc" code.
2) I have continuity from coil connector (primary side) to the connector that goes to the LC (square metal thing). I DO get high resistance (2.2k ohm) if I put DVM leads on the 2 wires coming in and out of the LC. Is that ok? Someone earlier (Dave?) said they bypassed this component with no problems. Should I try that?
3)power transistor tests good. I was not able to make this second part work with my DVM--wasn't fast enough. Probably an analog one would be handy here. However, I hooked up an LED as described and I got pulsing illuminations on the LED. So PT is getting signal from ECU it seems.
So what component specifically sends tach signal to dash tachometer and ECU?
And Dave, I took the steering column cover off and poked at the ignition switch. I don't see anything that comes apart. there are several thick wires going into the back of the cylinder. I did not see a way to take those out. Should I be tracing them down to a connector somewhere? Did not see any connector downstream, it looked like it continued on into the dash. There WAS a small connector coming out of the side of the ignition switch right near the keyed part, but it looked ok and jiggling and snugging of all above wires during cranking didn't yield any new behavior.
Sigh...my wife is running out of patience with me. Its to the point where I have to work on this thing when she's asleep or away in order to avoid "wifely comments" <img src="/forums/images/graemlins/rolleyes.gif" alt="" />. Thank you, son, for taking a long nap for me...
