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She started running rich :(

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Old 03-17-2005, 03:04 PM   #1
Dbeck002
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Default She started running rich :(

On the way to school today i noticed the engine consumes twice as much as gas as usual, it took me half of an eighth of a tank to get to school now it takes a whole eighth to get there and another to get back, quarter tank??? i also noticed a huge drop in power, i was used to just touching the pedal and flying now i kinda have to wait, wtf!!!!!!??

why is she running so rich all of a sudden, this started today!

O2 sensors are less than a year old, fuel pressure is at 41-42 which is normal for me. i dont understand whats going on.
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Old 03-17-2005, 03:16 PM   #2
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Default RE: She started running rich :(

Maybe a vaccum cracked or fell off.Sounds like it might ba a vaccum leak.
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Old 03-17-2005, 03:19 PM   #3
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Default RE: She started running rich :(

Does it sound like you have a turbo all the sudden?
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Old 03-17-2005, 03:21 PM   #4
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Default RE: She started running rich :(

no it doesnt sound any different really,

but this morning i washed my filter and dried it with a blower and put it back on, could that have done anything to the MAF sensor? it idles ok though so i dont know if the MAF is involved... i really cant figure this one out.
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Old 03-17-2005, 04:07 PM   #5
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Default RE: She started running rich :(

I sprayed carb cleaner all over the engine bay and on the vacuum lines, idle didnt change. so i dont know why the car is running so rich, only thing i can think of are the O2 sensors malfunctioning, maybe the wiring under there came loose. i dont know what else it could be really.
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Old 03-17-2005, 04:12 PM   #6
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Default RE: She started running rich :(

Possible bad O2 sensor or sensors.There is a sensor somewhere making the computer give more gas.
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Old 03-17-2005, 04:14 PM   #7
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Default RE: She started running rich :(

hmm could it be the RTV sealant i used last month to install the manifold. maybe its not O2 sensor safe, but would it take a whole month to show up? i drove her every day for hours and this never occured...




i ran the codes


i got code 54, 31, 85

31 and 85 have been there for months, just EGR bull****.

code 54 is the new code its weird, the book says

"Vane air flow sensor or air charge temperature sensor"

straight from the haynes manual, i didnt know we had air charge temp sensors in the 5.0s. whats this mean?
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Old 03-17-2005, 05:04 PM   #8
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Default RE: She started running rich :(

i checked the MAF just now and the resistors are intact. it seems to work fine since the car idles ok and revs ok.

i am suspecting its the O2s, but what could have caused it?

if its the RTV sealant, than when i buy new sensors will this happen again? the sealant will foul those ones too... i dont want to have to reinstall the manifold with new sealant that would be a bish..
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Old 03-17-2005, 05:51 PM   #9
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Default RE: She started running rich :(

Dbeck, is on of your plugs or wires!
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Old 03-17-2005, 06:21 PM   #10
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Default RE: She started running rich :(

checked each plug, they are gapped fine. doesnt seem to be the plugs, thanks anyway though bobby [&:]


plugs look a little whitish though.
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Old 03-17-2005, 07:11 PM   #11
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Default RE: She started running rich :(

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ORIGINAL: Dbeck002

checked each plug, they are gapped fine. doesnt seem to be the plugs, thanks anyway though bobby [&:]


plugs look a little whitish though.
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Old 03-17-2005, 07:42 PM   #12
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Default RE: She started running rich :(

how can it be lean if im getting 10 MPG?
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Old 03-17-2005, 07:46 PM   #13
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Default RE: She started running rich :(

oil change? [&:]
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Old 03-17-2005, 07:50 PM   #14
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Default RE: She started running rich :(

changed oil 1500 miles ago and it looks really good. dunno how that would affect gas mileage though.



did i mention that the engine temp on the way to school and on the way home was a tad high, not high but HIGHER than normal. it was still below 160, but im used to seeing it at 140. so i dunno what is causing that, maybe the problem is working on conjunction with engine temp and gas mileage. im thinking the rich condition is causing the engine temp to be weird. it might be my O2s, dammit i dont wanna buy new ones.
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Old 03-17-2005, 08:56 PM   #15
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Default RE: She started running rich :(

dude! your car is running way to cold. how many times do i have to tell you dont leave that fan on all the time. in a 30 minuted drive my fan might be on for 5 minutes.

let the temp come up to 180
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Old 03-17-2005, 09:11 PM   #16
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Default RE: She started running rich :(

You want your plugs to have a little white to them.
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Old 03-17-2005, 09:12 PM   #17
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Default RE: She started running rich :(

I agree way to cold but that is not the main problem cuz u always see your temp at 140 so did you check the fual press while running and did you check the vacume line going to it? And that code you pulled is i think a maf code


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Old 03-17-2005, 09:17 PM   #18
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Default RE: She started running rich :(

also clean you maf electronics as it may have some oil residue on it from your filter..
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Old 03-17-2005, 11:35 PM   #19
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Default RE: She started running rich :(

Quote:
ORIGINAL: Dbeck002

i got code 54, 31, 85

31 and 85 have been there for months, just EGR bull****.

code 54 is the new code its weird, the book says

"Vane air flow sensor or air charge temperature sensor"

straight from the haynes manual, i didnt know we had air charge temp sensors in the 5.0s. whats this mean?
it's either the MAF sensor OR the air temperature sensor built into the same housing with the MAF (vane air sensor). that what the code 54 is telling you to check out. probably got oil from the air filter on the wires in the MAF and this is making it act up on you.
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Old 03-17-2005, 11:42 PM   #20
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Default RE: She started running rich :(

Quote:
ORIGINAL: roundman

Quote:
ORIGINAL: Dbeck002

i got code 54, 31, 85

31 and 85 have been there for months, just EGR bull****.

code 54 is the new code its weird, the book says

"Vane air flow sensor or air charge temperature sensor"

straight from the haynes manual, i didnt know we had air charge temp sensors in the 5.0s. whats this mean?
it's either the MAF sensor OR the air temperature sensor built into the same housing with the MAF (vane air sensor). that what the code 54 is telling you to check out. probably got oil from the air filter on the wires in the MAF and this is making it act up on you.
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Old 03-17-2005, 11:42 PM
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