I've got a custom exhuast on my 97 and tore out the cat. I've got the check engine light on, but the 3.9 definatley seems to be running too rich. Are there any oxygen sensor simulators that do not require actually screwing in the sensor cause I didn't put a hole in my pipe for it and dont feel like doing it unless i have too. Thanks
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1997 Dodge Dakota Sport V6 5 speed
Not that Ive seen or heard of... buy a new cat and put back in your O2 sensors...proaly would be cheaper than all the gas...
2002 Chevy Trailblazer LT 4.2
1996 Subaru SVX LSi AWD 3.3 L Flat 6 (Highway car)
1987 Grand Am 2.5 L Inline(Just keeps going and going...)
Can't forget the work van 04 3500 EXPRESS lol
mine doesnt actually screw in but you have to wire it into the wires on your preexisting o2 sensor. the heating element cant be by passed on your o2. however your secondary o2 sensor has nothing to do with running rich. it just tells your computer if your cat is bad or not
1998 Dakota Sport 4x4
Regular Cab Short Bed
5.2 V8 5 speed Manual
31x10.50 Federal Couragia M/T
Can't say for sure, I didn't really notice anything. I wouldn't think so cause as mentioned it basicallyjust tells the computer the cat is good and eliminates the cel. Getting rid of the cat or going to a hi-flow one might help performance, but I don't think the OSS alone will.
2002 Dakota Sport 4x4 quad cab 4.7
If you're putting a simulator in for the pre-cat O2, you're going to mess up your A/F ratio since that one tells the ECU if it's running rich or lean. The after-cat O2 only tells the ECU if the cat is running properly.
i took the cat off mine and the engine lite come on too i bought a special pipe that angles the sensor pointing twords the back of the truck adn the sensor is sunken back a lil bit and the check engine lite is off now i think as long as the sensor isnt in the line of the exhaust it should be fine mine has 175,000 on it soo i need it tuned(burns rich too)
-01 Dakota SLT extended cab- mods: 3" drop, HO cams, intake, 4:10's, built trans w/shift kit