I've just finished wiring an Sc400 (40/40/40 plug) engine into my 5 speed manual Rover.
This is the 4th 1UZ in this car ( 1 stock and 2 supercharged engines and now back to basically stock) so I have a good idea of how they work.
The current engine has the plenum turned around, headers plus a CAI/BFI, otherwise unmodified.
The symptoms are a CEL showing 22 - Coolant Temp Sensor Signal a rough idle (hunting from 1,000 to 1,200rpm and no power and smells like its running rich. Also isn't starting all that well either.
I've replaced the Temp Sensor but still have the CEL. Yes I did reset the ECU.
Of interest if I press the CEL activation button (it earths the appropriate wire from the ECU) the idle is smoother but still at 1,000rpm.
I've checked the ignition side and its firing on all 8 cylinders. In my car I can reach in and feel the headers to see if the cylinders are firing.
I've replaced the ISCV and before fitting the replacement I checked the bearings are running free.
If I choke the air line to the ISCV it will drop the idle depending on how much I choke it off.
The o2 sensors are fairly new 3 wire Bosch units running as single wire.
I've spent two days on this and its doing my head in.
I'm starting to think leaking caps in the ECU.
I'm open to suggestions.
This is the 4th 1UZ in this car ( 1 stock and 2 supercharged engines and now back to basically stock) so I have a good idea of how they work.
The current engine has the plenum turned around, headers plus a CAI/BFI, otherwise unmodified.
The symptoms are a CEL showing 22 - Coolant Temp Sensor Signal a rough idle (hunting from 1,000 to 1,200rpm and no power and smells like its running rich. Also isn't starting all that well either.
I've replaced the Temp Sensor but still have the CEL. Yes I did reset the ECU.
Of interest if I press the CEL activation button (it earths the appropriate wire from the ECU) the idle is smoother but still at 1,000rpm.
I've checked the ignition side and its firing on all 8 cylinders. In my car I can reach in and feel the headers to see if the cylinders are firing.
I've replaced the ISCV and before fitting the replacement I checked the bearings are running free.
If I choke the air line to the ISCV it will drop the idle depending on how much I choke it off.
The o2 sensors are fairly new 3 wire Bosch units running as single wire.
I've spent two days on this and its doing my head in.
I'm starting to think leaking caps in the ECU.
I'm open to suggestions.