Quote:
Originally Posted by z3papa
OE tune. I've replaced the fuel pressure sensor, both actuators, and have the pass. side 02 sensor, and fresh plugs all ordered with install next week. I definitely think the issue is cold start conditions based on the 02 sensor, whether fuel pressure is down, or whether ignition is off a bit. Won't hurt to have these parts installed, cost wise.
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It's been a guessing game. Mine only happens on 'cold start', every other time after the first start is literally perfect. I have a tune with cold start sequence deleted. I did get a fuel pressure code 27CE after limp mode on some starts but has disappeared since; hence why i started looking at the fuel delivery system first.
So far i've replaced:
Battery
Driver Primary o2 (Had a code a while back but deleted and never came back)
Fuel Sensor (twice in case 1st was defective lol)
Fuel Pump EKP module
Fuel sender unit in driver side tank
Fuel Pump (Passenger side)
I have a new ICV on order. It's possible that my bank 2 actuator is not good as it started when i replaced this. my Spark plugs were done within 5k Miles. Will replace passenger o2 because why the fuck not at this point.