the infamous rb sputter problem

[hkst04z]

k so basically im sure you know about the sputter and loss of power problem while either free rev and driving. my car is having this problem and im aware of all the potential things that are bad but i checked almost everything. but the one thing i cant find a write up on is the ecu. because my ecu diagnostic light when i put my motor in would be on 100% of the time, but now the lights only on when the motor is off. i was just wondering would this contribute to any timing or fuel issues that would cause my motor to run like ****?

[devil_child]

The ECU light should be on when the car is running IIRC. Your ECu could be fried from a surge or not being grounded.

with the key in the on postion but not started, flip the little screw over all the way clockwise into diagnostic mode for 3 seconds or so and flip it back. Count the slow flashes, then count the fast flashes following it. Let us know what you see. Also be a little more in depth on what you have checked.

See my thread a few below yours, I am having most likely the same problem. I'll link it in a second.

zerothread/329496 Need more info like this.

[hkst04z]

well ive run ran it in diagnostic mode numerous times keeps giving me a code 55 which means all good correct? and so far ive checked the maf, coilpacks, spark plugs, cas, ignitor, boost leaks, alternator, knock sensors, temp sensor and timing. all check out ok. so im going to test an ecu and let you know because thats pretty much all thats left other than ignition relays and what not.