08-17-2020, 04:26 AM
Engine runs perfect with fuel down TB directly.
CEL working good, 12 code, no funny business with flickers or anything. Able to run motor with fuel down TB and have CTS unplugged and throw a code. Plug back in and back to 12. Seems to me that is a good sign ECU is not fried.
TPS tests out good, voltage good, Ohm tests are good. Tested everything you have written on your pages without a scope, the one thing I dont have
I have a tach and it shows rpm while cranking and if it runs with gas down TB. I have not checked for tach signal at the ECU input, not sure how to do that (which wire)
" but the low side transistor must have pull up to test it. the injector 1ohm coil meets that need. " now this is interesting. I had the injector/TPS harness unplugged while doing the positive and negative noid tests. Should I test with it hooked up and probe that way?
I did google that you can test PNP and NPN transistors with ohm meter on DMM. I am seeing that the positive side does not seem to be testing correctly. I am suspicious of that one now.
"12vdc on all power pins of ECU and grounds. too. " -Have not checked that.
"if you are lucky the key on test, for prime pulse at tip of injector horn off, seen to shoot very tiny fuel just keyon each time the 3 second rule happens.
key hear pump run 3sec, and this very tiny squirt happens. but not guaranteed, but if seen, is super good information if seen. " - I'm not quite following you here but yes the fuel pump runs for a short while when i key on.
CEL working good, 12 code, no funny business with flickers or anything. Able to run motor with fuel down TB and have CTS unplugged and throw a code. Plug back in and back to 12. Seems to me that is a good sign ECU is not fried.
TPS tests out good, voltage good, Ohm tests are good. Tested everything you have written on your pages without a scope, the one thing I dont have
I have a tach and it shows rpm while cranking and if it runs with gas down TB. I have not checked for tach signal at the ECU input, not sure how to do that (which wire)
" but the low side transistor must have pull up to test it. the injector 1ohm coil meets that need. " now this is interesting. I had the injector/TPS harness unplugged while doing the positive and negative noid tests. Should I test with it hooked up and probe that way?
I did google that you can test PNP and NPN transistors with ohm meter on DMM. I am seeing that the positive side does not seem to be testing correctly. I am suspicious of that one now.
"12vdc on all power pins of ECU and grounds. too. " -Have not checked that.
"if you are lucky the key on test, for prime pulse at tip of injector horn off, seen to shoot very tiny fuel just keyon each time the 3 second rule happens.
key hear pump run 3sec, and this very tiny squirt happens. but not guaranteed, but if seen, is super good information if seen. " - I'm not quite following you here but yes the fuel pump runs for a short while when i key on.