For the past week, i've been having wierd startups....When i start up my car....its kinda idles rough...and then smooths out.....after driving it idles smooth..etc...its only when the car has been off and i try to start the car up. Then...today..while driving to work..i noticed a loud pop on my passenger side firewall..it was freaking scary...i thought..maybe a rock or something cameup that side or something..so i didn't think much of it...but then a few seconds later...a CEL comes up..i haven't checked the code yet..im at work..but a friend is coming up to help me check it....but....when that CEL came up...I pulled over..popped the hood...i didn't see anything out of the ordinary..i checked under the car..no leaks...oil level was fine in the dip stick....this is freaking me out....any ideas?

Khoi

 

I checked my code..its 45...anyone help me on this??

Khoi

 

Code 45
System too lean/rich

Fuel supply system, Primary O2 sensor, MAP sensor, contaminated fuel, valve clearance, exhaust leakage

 

http://www.londonautoclub.org/...s.htm

 

Well, me and a friend just got through replacing the fuel filter...and we reset the ecu..and no CEL...we also checked the primary O2 sensor..and noticed that it was stripped........but...so we think that is the problem...my question however...is....nothing explain that loud pop i heard from the passenger side firewall...to me..it sounded as if i hit a rock..and it came up and hit the car or something........any ideas?

Khoi

 

backfire? do u have an exhaust leak?

 

the only leakage i could have is through that o2 sensor...but i heard it form the passenger side......firewall..it just didn't sound like a backfire......it sounded like literally...for example..get a metal spoon and knock it hard against a wood table....

Khoi

 

bump