02-06-2021, 10:10 PM
it can be lots of things, even bad wiring
old cars mostly have like 5 things wrong, not just 1.
the most hard problem of all is ECU bad, as proving this true all inputs to ECU must be checked for good.
All ECU fails with bad inputs as all computers do.
sensors. acting up. (all)
or ECU finds it self out of control on fuel mix. or spark not correct that it controls.
ECU;s can get lost (out of control). there are 3 main loops on a hot engine in the CPU,
Idle control loop
spark advance control loop (CMP is the initiator only)
injection rates and 02 based. and WOT rules. (accel modes) loop. controls fuel mix at all times.
the loops are sub processes in the ECU.
there is limphome mode too, that undermines all the above, a place not to be ,even for 1 second, for sure not repeating.
old cars mostly have like 5 things wrong, not just 1.
the most hard problem of all is ECU bad, as proving this true all inputs to ECU must be checked for good.
All ECU fails with bad inputs as all computers do.
sensors. acting up. (all)
or ECU finds it self out of control on fuel mix. or spark not correct that it controls.
ECU;s can get lost (out of control). there are 3 main loops on a hot engine in the CPU,
Idle control loop
spark advance control loop (CMP is the initiator only)
injection rates and 02 based. and WOT rules. (accel modes) loop. controls fuel mix at all times.
the loops are sub processes in the ECU.
there is limphome mode too, that undermines all the above, a place not to be ,even for 1 second, for sure not repeating.
http://www.fixkick.com