CA experts.... please help strange misfire not vaccum

[ca18coupe]

Well, the day before this started happening it was fine, here's whats happening when the throttle is depressed just slightly, under 10%, my car is bogging down and misfiring, but with just a little more throttle it seemingly runs fine, and there is no problem with idle.When the problem occurs my wideband is showing 21.7 : 1 , indicating to me that the ecu has stopped sending fuel to the motor. first i checked the ecu for codes which it gave me 55 all clear( i thought it would be a sensor ), then i removed all my front mount piping and intercooler and stuck the stock mess back in to eliminate a vacuum leak, then i took out the coils and cleaned them up, replaced the spark plugs, replaced the fuel filter, all of which did nothing to effect the misfire, I noticed on my safc that it wasn't showing the proper throttle percentage so ran out and got a new TPS, but when set properly, 1000 ohms shut 9000 WOT, the misfire persist yet when adjusted to like 9160 wot and 1900 shut, the misfire goes away, but when driving and i let off the gas when there should be just air pumping though the motor, it's showing idle like a/f ratios well above idle rpm. So what do you think? fuel pump maybe ? please help I'm stuck.

Thanks for your time

[ca18coupe]

well, just went and started the car back up to watch the a/f ratios on no throttle deceleration and with out readjusting the tps ( still not correct ohms ), just started the car up, and the problem is back, when before i shut the car off the problem was gone aside from the idle-like a/f ratios on no throttle deceleration. So maybe the resistor? help me out people

thanks

[boost_boy]

well, just went and started the car back up to watch the a/f ratios on no throttle deceleration and with out readjusting the tps ( still not correct ohms ), just started the car up, and the problem is back, when before i shut the car off the problem was gone aside from the idle-like a/f ratios on no throttle deceleration. So maybe the resistor? help me out people

thanks

Start with your O2 sensor and see what's the status of it. It seems to be you guys using them SAFCs that are having strange issues like the ones you are having.

[ca18coupe]

Should have told you there is no tune on the safc, the car is running purely off the stock ecu. Were you referring to the wide band o2 or stock narrow o2? The wide band is just shy of 3 months old, and seems to have no problem as when the ecu pulls fuel, my misfire problem, the wide band reads 21.7 : 1 as it should.

[Liquid_Neon]

21.7 doesnt mean there is no fuel... it just means there is lots of oxygen. if your misfireing there could still be fuel in there.

Remember an 02 sensor only see oxygen... nothing else.