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Old 01-20-2005, 03:59 AM   #1
HubbieScooby
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Member#: 7088
Join Date: May 2001
Location: Tropical Island
Vehicle:
01
Super Slow

Default defogger bogs car?

has this happen to you? when i turn my rear window defogger, my car bogs and stalls out....my voltage meter bounces up and down and so does my RPMs until the car bogs and dies....could it be an issue with grounding? side note is that i have a blown o2 sensor for about 3 years now never had the chance to change it out yet....i have a home made grounding kit but it never gave me any problem till now....thanks

Hugh
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Old 01-20-2005, 04:18 AM   #2
Impretzle
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black

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As you probably already know, the A/C is turned on when you select the defroster, to clear the windshield quicker... The computer or idle valve should bump the idle up when it sees the A/C is running, so perhaps there is something wrong with..

*The signal going from the A/C to the computer
*The signal from your dashboard HVAC controls to the computer
*Your idle valve

Does your car go through it's normal idle cycle when it starts cold, and does it generally idle / run properly?

These are just ideas, I have no idea what I'm talking about.


ON a side note, how is your gas mileage without an O2 sensor? If it's really good your car is probably running lean, which could damage your engine. If your car is a 2001, why is the O2 sensor broken already??
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Old 01-20-2005, 04:31 AM   #3
WRXdriver04
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ok well yea thats correct that the ac pump is turned on for the defroster.. the fact that u said REAR window defogger.. i dont know.. because my idle fluctuates as well with the front windshield defrost. nothing happens with the back defogger..

also, uve had a blown o2 sensor for 3 years now? with no chance to change it? hmm.. ure either a real busy person.. or.. yea.
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Old 01-20-2005, 05:00 AM   #4
HubbieScooby
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thanks for the comments guys...here are some more datails...

my o2 is probably fouled because i am running a ludespeed stage 2 kit for about 3 years now...i never really took the time to change it out because i would probably foul the new one also...my car only has a RRFRP and fuel pump....so no hardcore EMS just yet....i am probably getting about 13mpg city driving...the rear defogger i mean the button next to the hazard...when i do turn on the a/c the idle is bumped up and it runs fine...when it bogs there is a really strong gas smell...
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Old 01-20-2005, 07:11 AM   #5
Mulder
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You may have a weak battery and/or alternator. The rear defogger draws a high amount of current and thus places a big demand on the electrical system. If one of the system components is marginal you could experience sypmtoms like you're having.
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Old 01-20-2005, 04:02 PM   #6
HubbieScooby
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Quote:
Originally Posted by Mulder
You may have a weak battery and/or alternator. The rear defogger draws a high amount of current and thus places a big demand on the electrical system. If one of the system components is marginal you could experience sypmtoms like you're having.
thanks for the comment

i did notice that my battery use to have 14.3 readout about a year ago...i killed it a few times letting my alarm suck it all out and killed one time with my stereo being on too long...now it's about 14.0 or less....wouldn't the alternator recharge the battery fully after a period of time?
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Old 01-23-2005, 04:02 AM   #7
Uncle Ben
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Quote:
Originally Posted by HubbieScooby
thanks for the comment

i did notice that my battery use to have 14.3 readout about a year ago...i killed it a few times letting my alarm suck it all out and killed one time with my stereo being on too long...now it's about 14.0 or less....wouldn't the alternator recharge the battery fully after a period of time?
Not if your alternator is faulty or weak for whatever reason...
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