It Stinks
12-04-2002, 07:50 AM
#1
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It Stinks
Hello fellow Maxers!
I have a 93 SE with 140K on it, and it smells awful rich!
It burns very rich and I can smell unburned fuel and sometimes it is so strong it almost smells like raw gas.
I have ran several tanks of injector cleaner and replaced the plugs. I also have tried replacing the Coolant Temp. sensor and plug as directed by the Nissan parts guy as being the most likely culprit. I have not changed the O2 sensor yet as I'm not getting a check engine light, but suspect that could be the problem. Or is it possibly bad injectors??? Mass flow air sensor??
It runs great, so I wasn't sure what could be causing this and hate to start buying 100 or more dollar parts in a trial and error game.
I also have replaced the Idle control motor as it crapped out and it would not idle. Only modification besides the VTC grounding is a Pop-Charger but it smelled before I installed that too.
Any insight would be appreciated!
I have a 93 SE with 140K on it, and it smells awful rich!
It burns very rich and I can smell unburned fuel and sometimes it is so strong it almost smells like raw gas.
I have ran several tanks of injector cleaner and replaced the plugs. I also have tried replacing the Coolant Temp. sensor and plug as directed by the Nissan parts guy as being the most likely culprit. I have not changed the O2 sensor yet as I'm not getting a check engine light, but suspect that could be the problem. Or is it possibly bad injectors??? Mass flow air sensor??
It runs great, so I wasn't sure what could be causing this and hate to start buying 100 or more dollar parts in a trial and error game.
I also have replaced the Idle control motor as it crapped out and it would not idle. Only modification besides the VTC grounding is a Pop-Charger but it smelled before I installed that too.
Any insight would be appreciated!
12-04-2002, 07:57 AM
#2
Senior Member
Join Date: Oct 2001
Posts: 1,764
do you have black smoke?
is the car dumping fuel out of the exaust?, it could be your O2, because when that goes bad your engine light won't come on. If you unplug your O2 sensor and it starts running a little better then replace your O2... keep researching
-get some to lend you there MAF senosr and see if thats the problem, because the MAF sensor is a lot-o-money!
good luck..
-get some to lend you there MAF senosr and see if thats the problem, because the MAF sensor is a lot-o-money!
good luck..
12-04-2002, 08:02 AM
#3
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Re: do you have black smoke?
Originally posted by ChrisCheezer
is the car dumping fuel out of the exaust?, it could be your O2, because when that goes bad your engine light won't come on. If you unplug your O2 sensor and it starts running a little better then replace your O2... keep researching
-get some to lend you there MAF senosr and see if thats the problem, because the MAF sensor is a lot-o-money!
good luck..
is the car dumping fuel out of the exaust?, it could be your O2, because when that goes bad your engine light won't come on. If you unplug your O2 sensor and it starts running a little better then replace your O2... keep researching
-get some to lend you there MAF senosr and see if thats the problem, because the MAF sensor is a lot-o-money!
good luck..
Doesn't seam to dump fuel out of the exhaust but the odor is very strong there.....
So a bad O2 sensor won't light the light?? Nissan said it would (like they know anything or would tell it to ya)
ThanX !!
12-04-2002, 08:47 AM
#4
I actually unplugged my O2 sensor and drove 500 miles with it and the light never came on.
your problems are either 1: dead O2 sensor. (run an ECU diagnostic to find out. )
or, 2: the gallons of injector cleaner ruined the orifices in your injectors and they now spray WAY too much fuel since the chemicals in the cleaners are so harsh that they will eat the metal in the injectors and actually cause them to fail instead of simply cleaning them.
You might take the hint above and stop pouring injector cleaner through it. I've ruined two carbouretors and a couple of fuel injectors from that crap. the chemicals are just too harsh for the soft metals.
your problems are either 1: dead O2 sensor. (run an ECU diagnostic to find out. )
or, 2: the gallons of injector cleaner ruined the orifices in your injectors and they now spray WAY too much fuel since the chemicals in the cleaners are so harsh that they will eat the metal in the injectors and actually cause them to fail instead of simply cleaning them.
You might take the hint above and stop pouring injector cleaner through it. I've ruined two carbouretors and a couple of fuel injectors from that crap. the chemicals are just too harsh for the soft metals.
12-04-2002, 09:17 AM
#5
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Originally posted by Matt93SE
I actually unplugged my O2 sensor and drove 500 miles with it and the light never came on.
your problems are either 1: dead O2 sensor. (run an ECU diagnostic to find out. )
or, 2: the gallons of injector cleaner ruined the orifices in your injectors and they now spray WAY too much fuel since the chemicals in the cleaners are so harsh that they will eat the metal in the injectors and actually cause them to fail instead of simply cleaning them.
You might take the hint above and stop pouring injector cleaner through it. I've ruined two carbouretors and a couple of fuel injectors from that crap. the chemicals are just too harsh for the soft metals.
I actually unplugged my O2 sensor and drove 500 miles with it and the light never came on.
your problems are either 1: dead O2 sensor. (run an ECU diagnostic to find out. )
or, 2: the gallons of injector cleaner ruined the orifices in your injectors and they now spray WAY too much fuel since the chemicals in the cleaners are so harsh that they will eat the metal in the injectors and actually cause them to fail instead of simply cleaning them.
You might take the hint above and stop pouring injector cleaner through it. I've ruined two carbouretors and a couple of fuel injectors from that crap. the chemicals are just too harsh for the soft metals.
Nissan ran a diag. on it and came back with some recommended 100K $795 dollar tune up thing, but never said anything about anything being bad.
I guess it's worth the hundred bucks to see
12-04-2002, 11:53 AM
#6
Originally posted by Matt93SE
You might take the hint above and stop pouring injector cleaner through it. I've ruined two carbouretors and a couple of fuel injectors from that crap. the chemicals are just too harsh for the soft metals.
You might take the hint above and stop pouring injector cleaner through it. I've ruined two carbouretors and a couple of fuel injectors from that crap. the chemicals are just too harsh for the soft metals.
12-04-2002, 12:08 PM
#7
Senior Member
Join Date: Jun 2002
Posts: 298
Originally posted by Fosgate Fan
i just pour in a bottle of injector cleaner...and now i read this now i'm startin to worry. so fuel injector cleaners is a no-no for our max or just go easy on that stuff?
i just pour in a bottle of injector cleaner...and now i read this now i'm startin to worry. so fuel injector cleaners is a no-no for our max or just go easy on that stuff?
Dont worry, I have a ran a couple bottles through our 92SE, and it has 160K miles.
Just get ZMAX and a Tornado, that will help you.
12-04-2002, 04:00 PM
#8
Originally posted by 5spd92SE
Just get ZMAX and a Tornado, that will help you.
Just get ZMAX and a Tornado, that will help you.
12-04-2002, 09:26 PM
#11
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Join Date: Jul 2002
Posts: 262
Argh, my car just suffered the same problem. Strong gas smells, especially in my garage after I just put the car in. There's no smell when I first start it in the morning, suggesting that the problem happens when the engine's running. Also sometimes the smell comes into the car when the car's idling / not moving. Grrr!
12-05-2002, 05:36 AM
#12
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Originally posted by Agamemnon
Argh, my car just suffered the same problem. Strong gas smells, especially in my garage after I just put the car in. There's no smell when I first start it in the morning, suggesting that the problem happens when the engine's running. Also sometimes the smell comes into the car when the car's idling / not moving. Grrr!
Argh, my car just suffered the same problem. Strong gas smells, especially in my garage after I just put the car in. There's no smell when I first start it in the morning, suggesting that the problem happens when the engine's running. Also sometimes the smell comes into the car when the car's idling / not moving. Grrr!
01-08-2003, 09:20 AM
#14
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Re: Maybe the charcol can
Originally posted by jackflamer
Have you guys ever checked the charcoal can underneath the battery?
Have you guys ever checked the charcoal can underneath the battery?
Tried the Following:
Coolant Sensor
O2 Sensor
New NGK Laser Platinum Plugs
New Idle control motor (because it wouldn't idle not because of smell)
Now what I found was no change after each, but when I removed the old plugs I inspected each carefully thinking that I may have had a bad injector or two. Each of the plugs were identical in color and smell TOO RICH.... So got me thinkin about the idle control motor and a mysterious little screw on the side of it... is it adjustable????
I was afraid to turn it as the idle control motor has coolant running through it and I thought it may just be some drain plug. Does anyone know whether the CPU controls everything or can you adjust the idle circuit mixture with this screw and butterfly stop???
Thanks and still stinkin
01-08-2003, 09:37 AM
#15
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Posts: 14
Are you sure that you aren't actually smelling raw gas? A fuel line can leak a little, evpaorate away, and smell like crazy. When you say that you are running rich, is there black smoke coming out of the exhaust? Gas on a plug (or several) may or may not be a sign, depending upon where the cylinder was in the firing sequence.
01-08-2003, 10:50 AM
#16
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Originally posted by David Bost
Are you sure that you aren't actually smelling raw gas? A fuel line can leak a little, evpaorate away, and smell like crazy. When you say that you are running rich, is there black smoke coming out of the exhaust? Gas on a plug (or several) may or may not be a sign, depending upon where the cylinder was in the firing sequence.
Are you sure that you aren't actually smelling raw gas? A fuel line can leak a little, evpaorate away, and smell like crazy. When you say that you are running rich, is there black smoke coming out of the exhaust? Gas on a plug (or several) may or may not be a sign, depending upon where the cylinder was in the firing sequence.
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