Loss of power

[ivan12]

For about 2 weeks now my car bogs down during normal acceleration no matter if it's warmed up or not and no matter what the weather is like. I already replaced and double checked my TPS setting, cleaned my IAC valve and sprayed my MAF with MAF specific cleaner with no change at all. The bogging goes on and off, sometimes it will run like a new car and then I'll get to a stoplight and once I go it will feel like it's missing a lot of power. Other times I'll be cruising at normal speeds while it's feeling bogged and all of a sudden without me giving it more or less gas the power kicks in. The weird thing is if I give it WOT at any time it will all of a sudden wake up and run great. When it bogs the idle gets really rough, my exhaust sounds different, I can see a little bit of smoke come out of my side exhaust and it smells like raw fuel. Car is mostly stock, has CAI, comp cam the previous owner installed, and full exhaust. I've had the car for about 5-6 years and this problem started recently. Don't know if there is any more info I can give. Thoughts?

 

[DFG_magic]

Try replacing the O2 sensors. Are your cats clogged?

 

[ivan12]

Ive been meaning to get the sensors for a while now. I hope the cats aren't clogged I got the high flow Catted x pipe not a couple of months ago

 

[Silver91Hatch]

FUEL FILTER!!!!

 

[MustangMoser]

fuel filter x2 dont replace 02s unless they are throwing on a check engine light, waste of money

 

[Silver91Hatch]

Oxygen sensors could be reading slowly or biased. If they are reading incorrectly(verified with a wideband perferably) or slowly then replace them.

 

[ivan12]

The fuel filter isn't that old. I'll change it anyways since it's easy and cheap to replace, although I have my doubts about it because of the way the car runs at WOT. I'm going to order the O2 sensors from tousley, they're about $38 each plus shipping so it's not so bad, I guess I'll know in about a week.

 

[DFG_magic]

dont replace 02s unless they are throwing on a check engine light, waste of money

That is too funny. I wouldn't listen to this.

 

[ivan12]

I switched out the O2 sensors this morning and now it runs like a champ, I can hit the redline, and I don't get any backfire through the intake.

 

[MustangMoser]

I stand corrected, lol

 

[DFG_magic]

Moser, we all learn something new about these cars everyday bro! ivan, glad to hear you got it running proper!

 

[LAFENATU]

Have you pulled all of the spark plugs as well when you did the o2's??

 

[ivan12]

I didn't pull the spark plugs, didn't know I was supposed to

 

[Silver91Hatch]

Well if it was running super rich then it could have fouled the plugs, super lean could have burnt off the electrodes.

 

[ivan12]

Gotcha, I'll check them and replace if needed

 

[LAFENATU]

I didn't pull the spark plugs, didn't know I was supposed to

Well if it was running super rich then it could have fouled the plugs, super lean could have burnt off the electrodes.

Dis ni99a knows what I mean.. :icon_rr: