check engine light, i need some help

Black99GT · February 8th, 2012, 06:01 PM

ok since i am new to the new edge mustangs, i thought my cel might have been from fixing my exhaust leak that was leaking for who knows hong long before i bought the car, well on my way home from work i stopped at advance so they could scan it and tell me whats wrong, i have a hesitation under load that comes and goes. the scanned came up with 2 codes, a P0455 evap light leak detected and a P0442 gross leak detected no flow. what does this mean? and could it be my hesitation problem? i did notice last weekend i filled the tank for the first time and it leaked about a cup of gas overnight where i parked it. when i have 3/4 of a tank i get a real strong gas smell from the rear when i come back from a drive and shut the car off. my lincoln has an evap tray under the trunk and they are notorious for having problems. does anyone know what i should look for or has anyone had these same codes and fixed them? if so what did you have to do. i appreciate any help.

cliffyk · February 8th, 2012, 06:05 PM

Here are the possible causes and diagnosis tips for P0455, and same for P0442...

Mystang 02GT · February 8th, 2012, 07:09 PM

probably the fill neck,those hoses go bad on mustangs all the time.

Black99GT · February 8th, 2012, 09:21 PM

thats what i am thinking too because like i said last weekend when i filled it, it was running down the plastic tank shield from the pass side of the tank, and dripping off toward the back right corner of the tank near the pass side tail pipe. i guess i have to get under it to see whats going on. when its on my buddies lift getting the diff rebuilt and gears installed this weekend i will check out the tank, the evap tray and the hoses. do you think this would be causing the stuttering under load? i just put brand new plugs in it too. i want to put 8 new coils on it but they dont give those things away!!

bottled2v · February 8th, 2012, 09:40 PM

an evap leak will not cause any stuttering issues. while it's on the hoist throw a new fuel filter on it.

the gaskets where the fuel filler tube go into the tank have had issues leaking, mine was leaking on my car when i bought it. those things are expensive too, you're looking at 30-40 for a ford one. luckily i get parts at cost so it only cost me 12 bucks haha.

Black99GT · February 8th, 2012, 11:34 PM

I'll go under there with my cigarette lighter and see what's going on!

bulloch27 · February 8th, 2012, 11:44 PM

That's a fine idea. Keep us posted on how that works out for you lol.

cliffyk · February 8th, 2012, 11:49 PM

Originally Posted by Black99GT

I'll go under there with my cigarette lighter and see what's going on!

That'll work--do you want flowers or donations to a favourite charity?

bulloch27 · February 8th, 2012, 11:58 PM

Ima send mine to a burn center somewhere.

February 8th, 2012, 06:01 PM	#1
Black99GT Bone Stock GT 1999 Black GT 5 speed Join Date: Jan 2012 Location: palm harbor fl Posts: 46 iTrader: 0 reviews	check engine light, i need some help ok since i am new to the new edge mustangs, i thought my cel might have been from fixing my exhaust leak that was leaking for who knows hong long before i bought the car, well on my way home from work i stopped at advance so they could scan it and tell me whats wrong, i have a hesitation under load that comes and goes. the scanned came up with 2 codes, a P0455 evap light leak detected and a P0442 gross leak detected no flow. what does this mean? and could it be my hesitation problem? i did notice last weekend i filled the tank for the first time and it leaked about a cup of gas overnight where i parked it. when i have 3/4 of a tank i get a real strong gas smell from the rear when i come back from a drive and shut the car off. my lincoln has an evap tray under the trunk and they are notorious for having problems. does anyone know what i should look for or has anyone had these same codes and fixed them? if so what did you have to do. i appreciate any help.

February 8th, 2012, 06:05 PM	#2
cliffyk Hardcore Enthusiast Join Date: Feb 2007 Location: Saint Augustine, FL Posts: 1,808 iTrader: 1 reviews	Here are the possible causes and diagnosis tips for P0455, and same for P0442... __________________ -cliff knight- My Mustang 2003 GT, UPR X, 24lb/h injectors, Magnaflow, 180° stat, PP 70mm TB & plenum, DF Commando, Steeda UDPs, Ralco RZ_flywheel, RAM HDX clutch, WX EFX COPs 3.73s, 262 rwHP/305 lb-ft. Flex-fuel: burns gas and rubber...

February 8th, 2012, 09:40 PM	#5
bottled2v Hardcore Enthusiast '00 gt, '95 gt, '83 lx 11.85@116 Join Date: Oct 2010 Location: Saginaw, mi Posts: 2,428 iTrader: 0 reviews	an evap leak will not cause any stuttering issues. while it's on the hoist throw a new fuel filter on it. the gaskets where the fuel filler tube go into the tank have had issues leaking, mine was leaking on my car when i bought it. those things are expensive too, you're looking at 30-40 for a ford one. luckily i get parts at cost so it only cost me 12 bucks haha. __________________ '00 GT, hp 292's, full bolt ons, built/stalled auto, 4.10's, 150 shot-new times to come. '95 GT, 347, tko, etc-11.8@116-sold. WTT-my mildly built 4r70 for t56/tko.

February 8th, 2012, 11:44 PM	#7
bulloch27 Hardcore Enthusiast 2003 Mustang Fauxbra N/T @ Fast Join Date: Jan 2011 Location: Statesboro, Ga Posts: 2,879 iTrader: 0 reviews	That's a fine idea. Keep us posted on how that works out for you lol. __________________ All the typical bolt-ons, well a lot are welded on. Bone stock I tell ya. First time at the track, what do I do now? 03 Silver Fauxbra; 06 Legend Lime GT, 89 Outwlaw 10.5W Coupe, 93 Teal Cobra, 93 Red GT, 93 Teal LX - All Sold

February 8th, 2012, 11:58 PM	#9
bulloch27 Hardcore Enthusiast 2003 Mustang Fauxbra N/T @ Fast Join Date: Jan 2011 Location: Statesboro, Ga Posts: 2,879 iTrader: 0 reviews	Ima send mine to a burn center somewhere. __________________ All the typical bolt-ons, well a lot are welded on. Bone stock I tell ya. First time at the track, what do I do now? 03 Silver Fauxbra; 06 Legend Lime GT, 89 Outwlaw 10.5W Coupe, 93 Teal Cobra, 93 Red GT, 93 Teal LX - All Sold

February 8th, 2012, 07:09 PM	#3
Mystang 02GT Regular 2002 mustang gt Join Date: Apr 2011 Location: philly Posts: 245 iTrader: 0 reviews	probably the fill neck,those hoses go bad on mustangs all the time.

February 8th, 2012, 09:21 PM	#4
Black99GT Bone Stock GT 1999 Black GT 5 speed Join Date: Jan 2012 Location: palm harbor fl Posts: 46 iTrader: 0 reviews	thats what i am thinking too because like i said last weekend when i filled it, it was running down the plastic tank shield from the pass side of the tank, and dripping off toward the back right corner of the tank near the pass side tail pipe. i guess i have to get under it to see whats going on. when its on my buddies lift getting the diff rebuilt and gears installed this weekend i will check out the tank, the evap tray and the hoses. do you think this would be causing the stuttering under load? i just put brand new plugs in it too. i want to put 8 new coils on it but they dont give those things away!!

February 8th, 2012, 11:34 PM	#6
Black99GT Bone Stock GT 1999 Black GT 5 speed Join Date: Jan 2012 Location: palm harbor fl Posts: 46 iTrader: 0 reviews	I'll go under there with my cigarette lighter and see what's going on!

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