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02 Sensor...
How do yo know if and when it needs replacing. My car runs rich...is this bec iof the sensor? I get about 20-21 mpg (I don't ALWAYS run it hard.....is that bad? I heard these cars get about 25-28 mpg?
I have a used 02 sensor given to me that came off a good running car......anyone recomment against trying that? And if so, what difference to I look for? I'm thinking of buying the Bosch replacement...IF I know of someone that can splice and attach with proven capability. This is definitely something I do not want to do myself since I see in FR wilks description one needs to be careful and I would want it done correctly....the first time! Any ideas?? A gas analyzer should help me, huh?
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83 944 N/A 5 sp. (mine) 90 Acura Integra auto (sons) 2000 Honda Odyssey EX auto (wife) 83 Suzuki LT 125 (4 wheeler) (wife) 92 Honda XR 80 (son) 97 Honda CR 125R (son) 98 Honda CR250R (MINE) 2000 Kawasaki KX 65 (son) 2003 Honda XR 50 (Son and daughter) |
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09-23-2003, 08:42 AM
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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09-23-2003, 09:01 AM
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Yeah, I saw that.....The instructions are what made me back off attempting to do it myself, but I do have some electrician friends, so I will probably buy one and let him do the splicing...
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83 944 N/A 5 sp. (mine) 90 Acura Integra auto (sons) 2000 Honda Odyssey EX auto (wife) 83 Suzuki LT 125 (4 wheeler) (wife) 92 Honda XR 80 (son) 97 Honda CR 125R (son) 98 Honda CR250R (MINE) 2000 Kawasaki KX 65 (son) 2003 Honda XR 50 (Son and daughter) |
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09-23-2003, 09:14 AM
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Splicing?
Cut wire. Strip wire. Slip connector over wire and crimp. Install O2 sensor. Drive car.
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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09-23-2003, 09:21 AM
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DUH!!!
I'm gonna do it!!! Now, how do I know this is the problem with my poor fuel mileage? Rich running? Or should I refer to FR WIlks CO calibration set up??
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83 944 N/A 5 sp. (mine) 90 Acura Integra auto (sons) 2000 Honda Odyssey EX auto (wife) 83 Suzuki LT 125 (4 wheeler) (wife) 92 Honda XR 80 (son) 97 Honda CR 125R (son) 98 Honda CR250R (MINE) 2000 Kawasaki KX 65 (son) 2003 Honda XR 50 (Son and daughter) |
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09-23-2003, 09:23 AM
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Take a look in the back of the engine section in the factory manuals. There is a DME testing section. Has an x-y chart with 15 possible test ponts and 12 or 14 symptoms.
The DME thinks the engine is running lean. Where does it get this data from? AFS is hanging up or is not calibrated properly. Temp senders. One for incoming air in the AFS and engine temp. Other causes outside the feed back loop of the DME would be a leaking injector or high fuel pressure or both. Read through the DME testing plan in the back of the engine section.
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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09-23-2003, 09:30 AM
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Well, this and the repacking cv joints, axle, etc maintenance is what I am going to do next time I bring the car to my buddy's in Memphis. I am going to make a list, check it twice, and do all these little (and a few biggies) next time around.
Man, I just have so much fun when I get close to my exit on my way to work, window down and the howling 944 engine just makes my day!!
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83 944 N/A 5 sp. (mine) 90 Acura Integra auto (sons) 2000 Honda Odyssey EX auto (wife) 83 Suzuki LT 125 (4 wheeler) (wife) 92 Honda XR 80 (son) 97 Honda CR 125R (son) 98 Honda CR250R (MINE) 2000 Kawasaki KX 65 (son) 2003 Honda XR 50 (Son and daughter) |
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09-23-2003, 09:42 AM
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He's hooked!!!!
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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09-23-2003, 10:00 AM
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Join Date: Dec 2001
Location: Cordova, TN
Posts: 1,222
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If the car is running rich the O2 sensor is a good place to start. You can test it with a multimeeter. Cold it should read 0 or very low voltage like .2 volts. When warm it should fluctuate between 0.45-0.7 volts. The unheated ones will last about 30,000 miles the heated ones last longer about 60,000.
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Roger Hall 81 924 N/A Some people are like Slinkies. Not really good for anything, but you still can't help but smile when you see one tumble down the stairs. |
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09-23-2003, 04:15 PM
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Join Date: Dec 2002
Location: Richmond, VA
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Here is a quick test: Start the engine and take the car for a short drive, just long enough to get the engine up to normal temperature.
Park the car with the engine running, raise the hood, and unplug the O2 sensor. If the engine RPM does not change the sensor is most likely bad. The reasoning behind this is with a good sensor the DME will maintain an "optimum" (at least for emissions purposes) fuel/air mixture. When an O2 sensor fails, the DME defaults to a richer fuel/air mixture to prevent detonation or ping from a lean run. There fore, if the sensor has failed, unplugging it will not change the current fuel/air mixture and the engine RPM will remain constant. A slightly more "difficult" test involves connecting a DVM (Digital Volt Meter) to the O2 sensor output. At idle the sensor should have an output that varies, or dithers across 0.5 volts DC.
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Cliff Hipsher '87 944 India Red '86 951 Kalahari Metallic |
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09-23-2003, 09:10 PM
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Dang right I'm hooked!!
My local mechanic has a 92 Paseo he is selling. 50k miles and runs real good.....felt lively and peppy, too.....BUT, took it for a spin and when I got to a corner I like, I said, "Forget it! I don't want it" . Not that it is a bad car, but the handling just can't stick with it, and I had no confidence and it was a tad scary, too... I guess I'll hang onto the 944 til it breaks too bad to fix (and recover by parting out), or I win the lottery and move up!!  Thanks guys...those are nice and easy tests....I'm gonna print em and give it a shot to get an idea what my car is doing.....
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83 944 N/A 5 sp. (mine) 90 Acura Integra auto (sons) 2000 Honda Odyssey EX auto (wife) 83 Suzuki LT 125 (4 wheeler) (wife) 92 Honda XR 80 (son) 97 Honda CR 125R (son) 98 Honda CR250R (MINE) 2000 Kawasaki KX 65 (son) 2003 Honda XR 50 (Son and daughter) |
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09-24-2003, 05:43 AM
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1983 Porsche 944 2.5L
1983 Porsche 944 2.5L
1983 Porsche 944 2.5 liter
