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98 2.5L CEl #1283289 05/21/05 10:17 PM
Joined: Jan 2005 Posts: 21 midwest L latenightflyby OP New CEG\'er
OP latenightflyby New CEG\'er L Joined: Jan 2005 Posts: 21 midwest	i have a cel that comes on in my 98 2.5L atx. it tells me that it is running lean on both banks but the tip of the exhaust is black indicating that its running rich could this be an O2 senson problem? 1998 mercury Mystique 2.5L with that stupid slush box only engine mod so far a optimized tb dark blue with midnight blue leather interior finnaly got rid of the door ding guards and pinstripe

Re: 98 2.5L CEl #1283290 05/21/05 11:04 PM
Joined: Jul 2001 Posts: 7,100 San Antonio/Austin, TX R Ray_dup1 Addicted CEG\'er
Ray_dup1 Addicted CEG\'er R Joined: Jul 2001 Posts: 7,100 San Antonio/Austin, TX	Code NUMBERS would be nice.. The sensors stating that they are lean (VERY UNREAL to have BOTH go bad at the same time..) could be just that... The sensors could simply be stating what they truly are seeing.. a lean condition. If you have something creating a lean, the sensors will simply tell you what they see. Look for other problems, not TWO bad sensors at once. I would look for any air leaks after the MAF (TB gasket, UIM/LIM gaskets, EGR gaskets, vacuum hoses cracked, brittle, broken, or missing. Spray carb starter spray in to different areas, and see if the engine sputters, or stalls. If it did, then the spray made it in to the engine and caused that to happen. You found your cluprit area. (avoid letting the spray in to the air filter area.. you don't wanna create false results!!!) Anyway. Look for loose hoses, EGR vacuum hoses on top, etc... Ray '99 CSVT - Silver #222/276 In a constant state of blow-off euphoria. Originally posted by Kremitthefrog: I like to wear dresses and use binoculars to watch grandmas across the street.

Re: 98 2.5L CEl #1283291 05/22/05 01:24 AM
Joined: Jan 2003 Posts: 2,017 Toronto, Canada C chongo Hard-core CEG\'er
chongo Hard-core CEG\'er C Joined: Jan 2003 Posts: 2,017 Toronto, Canada	One easy thing is, it could just be the gas you put in. Did you go to a different name brand station? or your regular fill up station. 1996 2.5LT V6 Contour ATX My Tour+help/info pics E0 rims, Gutted Pre-Cats,CTA Custom Exhaust & Intake, Diablo Chip.

Re: 98 2.5L CEl #1283292 05/22/05 05:29 AM
Joined: Sep 2000 Posts: 9,602 KC, MO D DemonSVT_dup1 Hard-core CEG'er
DemonSVT_dup1 Hard-core CEG'er D Joined: Sep 2000 Posts: 9,602 KC, MO	Lean code = engine running MAX fuel enrichment. If it really is that rich I'd bet you have a dirty MAF or a vacuum leak. 2000 SVT #674 13.47 @ 102 - All Motor! It was not broke; Yet I fixed it anyway.

Both O2's lean #1283293 05/22/05 04:29 PM
Joined: Dec 2003 Posts: 2,203 Fort Collins, CO P PlatoSVT Hard-core CEG\'er
PlatoSVT Hard-core CEG\'er P Joined: Dec 2003 Posts: 2,203 Fort Collins, CO	I'm in the same boat as this guy, as far as both O2's reading lean. I plan on removing, cleaning and replacing the gaskets on the whole intake. LIM, UIM, Throttle Body, EGR, and IAC gaskets. What other parts/things should I look for while I'm undertaking this? I've replaced my IAC and PCV already, and I just don't know what else to look for during this process. Last edited by PlatoSVT; 05/22/05 04:29 PM. * Marine Officer Candidate * My Cardomain Page 1998 EO Black SVTC #3388

Re: Both O2's lean #1283294 05/22/05 05:27 PM
Joined: Jul 2001 Posts: 7,100 San Antonio/Austin, TX R Ray_dup1 Addicted CEG\'er
Ray_dup1 Addicted CEG\'er R Joined: Jul 2001 Posts: 7,100 San Antonio/Austin, TX	vacuum hoses (EGR vacuum tube) etc.. Ray '99 CSVT - Silver #222/276 In a constant state of blow-off euphoria. Originally posted by Kremitthefrog: I like to wear dresses and use binoculars to watch grandmas across the street.

Re: Both O2's lean #1283295 05/25/05 03:28 AM
Joined: Jan 2005 Posts: 21 midwest L latenightflyby OP New CEG\'er
OP latenightflyby New CEG\'er L Joined: Jan 2005 Posts: 21 midwest	i fill up at the same station every time i use 91 octane cause it is the cheapest with my discount and i just replaced the vacaum hoses that go into the manifold so i guess ill try to clean my Maf and see how that works. 1998 mercury Mystique 2.5L with that stupid slush box only engine mod so far a optimized tb dark blue with midnight blue leather interior finnaly got rid of the door ding guards and pinstripe

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