OK, finally find myself begging for help...
93 80 Series, US market 1FZ-FE OBD1
Essentially the vehicle has been completely apart. Engine has been removed, fresh rebuild, all engine bay wiring has been removed, as has the majority of the in vehicle wiring, dash, ECU, everything has been out.... Wiring harnesses have been inspected, rewrapped, new conduit where needed, broken connectors replaced, cleaned, etc. Point being, there are a LOT of opportunities for something to have been put back in the wrong place, missed, etc.
With most everything reassembled and back in place, went for first start. I was not initially successful, and did feel I was chasing a no spark issue at that time. Checked the initial items, verified connectors, coil wire, fuses, etc. Then, it starts right up, and runs perfectly. Idle was a bit high, around 1,100 RPM, good oil pressure, ran without a hiccup for say 3 minutes or so until I shut it off. Checked oil, coolant, trans and PS levels and left it for a few hours. Later when I was ready to finish filling coolant it would not start again, and has not since.
I have verified fuel / fuel pump, and this is a no spark issue.
NO SPARK when testing coil wire against any grounded surface
I first assumed it was a loose connection or ground issue. The ground in the footwell beside the ECU was NOT tight, so I assumed that was it. Tightened, but nope....
I have followed the no spark troubleshooting process, from memory...
I DO ALWAYS have a check engine light when the ignition is on. The ECU is getting power and working at least well enough to show ready.
I DO have 12V at the coil
Coil (which is new) checks OK on both hi and low (resistance check)
Distributor pick ups test OK (resistance check)
Coil wire tests OK (resistance check)
Ignitor has ground (continuity checked from case to bracket and fender)
All related relays, fuses and fusible links are new.
Distributor connector has been checked multiple times. I had actually replaced this connector housing as it was broken.
Based on multiple threads of "trust me, it's the fusible links" I replaced the already new fusible links with new fusible links.
All that lead to "check ignitor by replacing", so I installed a new ignitor, no change.
Only things left on the troubleshooting path are verify the IG signal from the ECU (which I need to find how to do) and replace ECU.
I would easily believe something was not reassembled correctly, but it started and ran PERFECTLY once.
Same for the ECU, might be bad, but I have a CEL with ignition on, and it ran perfectly once.
Open to, and appreciate, any thoughts and experience.
Thanks !
Jason
93 80 Series, US market 1FZ-FE OBD1
Essentially the vehicle has been completely apart. Engine has been removed, fresh rebuild, all engine bay wiring has been removed, as has the majority of the in vehicle wiring, dash, ECU, everything has been out.... Wiring harnesses have been inspected, rewrapped, new conduit where needed, broken connectors replaced, cleaned, etc. Point being, there are a LOT of opportunities for something to have been put back in the wrong place, missed, etc.
With most everything reassembled and back in place, went for first start. I was not initially successful, and did feel I was chasing a no spark issue at that time. Checked the initial items, verified connectors, coil wire, fuses, etc. Then, it starts right up, and runs perfectly. Idle was a bit high, around 1,100 RPM, good oil pressure, ran without a hiccup for say 3 minutes or so until I shut it off. Checked oil, coolant, trans and PS levels and left it for a few hours. Later when I was ready to finish filling coolant it would not start again, and has not since.
I have verified fuel / fuel pump, and this is a no spark issue.
NO SPARK when testing coil wire against any grounded surface
I first assumed it was a loose connection or ground issue. The ground in the footwell beside the ECU was NOT tight, so I assumed that was it. Tightened, but nope....
I have followed the no spark troubleshooting process, from memory...
I DO ALWAYS have a check engine light when the ignition is on. The ECU is getting power and working at least well enough to show ready.
I DO have 12V at the coil
Coil (which is new) checks OK on both hi and low (resistance check)
Distributor pick ups test OK (resistance check)
Coil wire tests OK (resistance check)
Ignitor has ground (continuity checked from case to bracket and fender)
All related relays, fuses and fusible links are new.
Distributor connector has been checked multiple times. I had actually replaced this connector housing as it was broken.
Based on multiple threads of "trust me, it's the fusible links" I replaced the already new fusible links with new fusible links.
All that lead to "check ignitor by replacing", so I installed a new ignitor, no change.
Only things left on the troubleshooting path are verify the IG signal from the ECU (which I need to find how to do) and replace ECU.
I would easily believe something was not reassembled correctly, but it started and ran PERFECTLY once.
Same for the ECU, might be bad, but I have a CEL with ignition on, and it ran perfectly once.
Open to, and appreciate, any thoughts and experience.
Thanks !
Jason