a while back there was a thread on home made eliminators how can i find thtat or can somone tell me how,,,99 cobra check eng. light on have no cats .when light is on does it effect the way your motor runs?? does it effect timing or anything??
I would suggest reading the FAQ section over at www.ponyexpressperformance.com
It covers most questions regarding MIL Eliminators. Also, don't forget about the search function on our forum - it can aid in finding an answer to a commonly asked question & has the potential to save a lot of time if your question has already been asked before
Here is a brief overview:
Your front O2 sensors affect the way your motor runs, however your rear O2 sensors are strictly there for "monitoring" purposes. So, let's say you just swap in an offroad midpipe in place of your factory H pipe. Eventually (9 times out of 10), your check engine light will illuminate because the rear O2 sensors are no longer picking up the correct reading (voltage) in the exhaust stream. That in turn, lights up the check engine light, BUT, if your check engine light is on because of THIS specific scenario, it is NOT hurting your performance. Now, here is the downside to this. You can run your vehicle like this for as long as you like, but if your car develops ANOTHER problem (unrelated to your exhaust, as an example), you won't be alerted to this fact because your check engine light is ALREADY ON. Make sense?
I am *guessing* that this is your current situation, so don't worry too much about it right now (it won't affect performance, but you *should* take care of it!), unless your check engine light was already on prior to your exhaust mod. It is a good idea (as you can tell) to use some form of MIL eliminator in order to prevent that check engine light from appearing after adding an aftermarket midpipe. There is the "splice-in" kind, offered by ponyexpressperformance, the "plug-in" style, offered by various retailers, and of course the homemade variety. Additionally, you can also have the rear O2 sensors "turned off" via a chip (most expensive route).
If you are unsure of why your check engine light is turned on, then it is a good idea to scan your computer/PCM in order to get the specific diagnostic codes before working at solving the problem...it will save you a LOT of time! G'luck!
I would suggest reading the FAQ section over at www.ponyexpressperformance.com
It covers most questions regarding MIL Eliminators. Also, don't forget about the search function on our forum - it can aid in finding an answer to a commonly asked question & has the potential to save a lot of time if your question has already been asked before
Here is a brief overview:
Your front O2 sensors affect the way your motor runs, however your rear O2 sensors are strictly there for "monitoring" purposes. So, let's say you just swap in an offroad midpipe in place of your factory H pipe. Eventually (9 times out of 10), your check engine light will illuminate because the rear O2 sensors are no longer picking up the correct reading (voltage) in the exhaust stream. That in turn, lights up the check engine light, BUT, if your check engine light is on because of THIS specific scenario, it is NOT hurting your performance. Now, here is the downside to this. You can run your vehicle like this for as long as you like, but if your car develops ANOTHER problem (unrelated to your exhaust, as an example), you won't be alerted to this fact because your check engine light is ALREADY ON. Make sense?
I am *guessing* that this is your current situation, so don't worry too much about it right now (it won't affect performance, but you *should* take care of it!), unless your check engine light was already on prior to your exhaust mod. It is a good idea (as you can tell) to use some form of MIL eliminator in order to prevent that check engine light from appearing after adding an aftermarket midpipe. There is the "splice-in" kind, offered by ponyexpressperformance, the "plug-in" style, offered by various retailers, and of course the homemade variety. Additionally, you can also have the rear O2 sensors "turned off" via a chip (most expensive route).
If you are unsure of why your check engine light is turned on, then it is a good idea to scan your computer/PCM in order to get the specific diagnostic codes before working at solving the problem...it will save you a LOT of time! G'luck!
thanks will that fool my state inspection station when they hook it up to there obdII connecter,if the light isnt on????they wont look under car.just need to throw them off. thanks for the link.
thanks will that fool my state inspection station when they hook it up to there obdII connecter,if the light isnt on????they wont look under car.just need to throw them off. thanks for the link.
If they hook it up to the OBDII tool, it will read "rear 02 sensor failure" or something along those lines. If you want to fool them, disconnect your battery for 10 minutes, reconnect and then have them inspect it. This will keep your check engine light off long enough for the inspection.
FYI - You "bumped" up a 6 year old thread (was created in '04, if you look at the original post). We usually don't do that around here; just sayin' ....