Recently I've removed the cat, changed plugs wires and coils (advance auto ones) I literally just did the wires today and that got rid of the misfires I was having randomly. Car will hold a solid idle now most of the time. Seems like when you turn the wheel or change ac it almost always messes with the idle. I tested the alternator a few days ago it was at 13.38 with just ac on went down to 13.03 with lights on. Battery is an optima red only a few months old. I've cleaned throttle body. Maf sensor. Filter (k&n) ess I just sprayed the dog **** out of it. Cleaned ssv. Sea foamed, water rotor wash. Still it just feels like it doesn't have the power anymore. Especially shifting from 1st to second it almost feels like it's not accelerating at al for a second. It does have a cel for rear 02 sensor which went bad with the cat. But to my knowledge that doesn't affect much? Unless it's actually just completely worn out? There's a slight hiss at idle very faint. Could that be a vacuum leak? I'm not experiencing misfires as of today with the new wires. The idle jumps around infrequently and it feels under powered all together. Sometimes more so then others. You can hear the relays and switches turn at idle and it will jump the idle around when it does that. I've reset the ecu done the 20 brake stomp. Which doesn't make my pressure gauge cycle but the cel does flash after i do that. Any thoughts? No starting issues hot or cold. Never have.

 

Idk for sure, but I've read that it may take a few drive cycles to relearn it's trims.(?)

 

This has been ongoing since winter ended. I've reset the ecu many times each time i do another fix. I didnt after the new wires. I'll go do that now but I think it's relearned it many times over.

 

So reset ecu took it on a nice long cruise. Still feels rich. Like it justs wants to get up and go but can't. And it doesn't seem to be every time it feels different when you get on it from different Rpms it's hard to explain.

 

I hiss can be a vacuum leak. It can really **** things off. It screws with the mixture differently based on throttle position.

For a learn cycle on the ECU, start it cold and let it idle until it heats up. Best after a battery off reset. Watch it, it is kind of interesting to see it go through the process. Mine, at the end, blips the throttle and then settles down to idle.

But, before that, find out what is hissing.