Join Date: Jan 2005
Location: Edmonton, Alberta, CANADA!
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ok thread jack everyone...ive got a similar problem. boosted 2rz on 15lbs with 450cc injectors 255 fuel pump. Driving around at low throttle is fine but as soon as i try WOT right at 3k rpms it leans out like crazy and sputters terribly....is this an o2 sensor problem? i have no obd2 port to check with so any way to check with a multimeter would be helpful....thanks in advanvce
When the ecu is in closed loop it is maintaining the afr closely based on the input from the o2 sensor. If you add some sort of piggy back you can alter the o2 signal and in effect trick the ecu to add fuel. When the ecu goes into open loop it no longer cares about the o2 signal and if your running larger injectors your afrs are often adequate.
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