The engine now runs ok when started cold, but if the weather is very hot or it's started when warm it goes into limp mode, whereby the orange spanner symbol comes on and max acceleration is only 1/3 it should be.
I thought it was caused by oil deposits by putting in 2 stroke oil by mistake, but this is looking less likely (see discussion below).
I needed to empty a fuel can which I thought was petrol only, but after adding say 200ml to a full tank of fuel I realized it was a 20:1 2 stroke oil mix.
So far I've tried:
EGR cleaner spray into the air inlet & cleaning EGR with brake cleaner, fine carbon layer no oil.
Spark plugs had oil deposits but actual arc surface was ok, put new plugs in.
- Used a bottle of redex injector cleaner at recommended mix in 2 full tanks.
P0400 Exhaust Gas Recirculation (EGR) Valve Range/Performance (Closed Valve)
P1122 Acceleration Pedals Position Sensor 2 Voltage Low
P1550 ELectronic Throttle Limp Home, LImited Performance
P1120 Acceleration Pedal Position Sensor 1-2 Correlation
P0136 O2 Sensor Circuit Voltage High
P1405 Exhaust Gas Recirculation (EGR) Sensor Circuit Low
Year is 2001, Engine is 1.6L SFI (Z16SE)
I'm guessing some of these might be red herrings or interconnected, which one(s) to target first? The guy who did the codes said the Limp mode was caused by the exhaust blowing by the flexible joint (which it does slightly) but it blew much worse in the past & didn't cause limp mode so I wasn't convinced by that particular theory.
Any suggestions on what to look at would be most appreciated.