Headers installed, loosing power!!
4th Gear Member
Joined: Jun 2005
Posts: 1,687
RE: Headers installed, loosing power!!
OK I need to clear some things up here.
When a O2 goes bad the computor will put the car in "limp' mode. This pretty much defaults to the safest settings in the ECU (is rich, pull timing etc). The car might feel a little down on power but should otherwise run and drive fine. The ECU will also throw a code for a bad O2.
When a O2 goes bad the computor will put the car in "limp' mode. This pretty much defaults to the safest settings in the ECU (is rich, pull timing etc). The car might feel a little down on power but should otherwise run and drive fine. The ECU will also throw a code for a bad O2.
Overdrive Member
Joined: Sep 2005
Posts: 4,053
From: Granbury, TX
RE: Headers installed, loosing power!!
ORIGINAL: bidicamaro
Now that's funny. Now I didn't catch if you had dropped your cats as well or not? And I didn't catch if they're long tube/shorties or midlength? Just a couple of things. Did I miss that? O2 sensors can do all kinds of things. If you have cat's and your O2's are bad you'll get a foul rotten egg smell and that's also an indication of bad cat's. I hope someone corrects me if I'm wrong but I'm pretty sure that's right? Also, at WOT an engine will usually disregard the O2's behind the cat and let the engine run a little rich. I'll see if I can't find where I got that, it may be in one of my "tech magazines."
ORIGINAL: SpecterGT260
how about an endoscope and check to see if you have any polyps on your exhaust? they may be cancerous if your car is having trouble peeing[>:]
how about an endoscope and check to see if you have any polyps on your exhaust? they may be cancerous if your car is having trouble peeing[>:]
Ninja Administrator
Joined: Jun 2007
Posts: 6,172
From: Potato
RE: Headers installed, loosing power!!
altho at WOT those o2's are generally ignored i believe. they cannot keep up with the changing conditions. not only that but engines usually command lower afr at high rpm than the o2's are designed to read. narrowbands are only accurate at 14.7 afr
Overdrive Member
Joined: Aug 2006
Posts: 4,496
From: Boulder, CO
RE: Headers installed, loosing power!!
If your car won't go past 20 mph and it hesitates and backfires you have a much larger problem than bad O2 sensors. Make sure you have all of your plug wires installed correctly and that your new headers haven't melted through the wires or the boots.
RE: Headers installed, loosing power!!
ORIGINAL: JD1969
OK I need to clear some things up here.
When a O2 goes bad the computor will put the car in "limp' mode. This pretty much defaults to the safest settings in the ECU (is rich, pull timing etc). The car might feel a little down on power but should otherwise run and drive fine. The ECU will also throw a code for a bad O2.
OK I need to clear some things up here.
When a O2 goes bad the computor will put the car in "limp' mode. This pretty much defaults to the safest settings in the ECU (is rich, pull timing etc). The car might feel a little down on power but should otherwise run and drive fine. The ECU will also throw a code for a bad O2.
4th Gear Member
Joined: Jun 2005
Posts: 1,687
RE: Headers installed, loosing power!!
Bank 2 lean could be a injector, could also be the front O2. The MAF code is saying somthing is wrong with your mass air flow sensor. My guess is that the MAF is bad and the car is running in limp mode. You should be able to unplug the MAF and the car will still run and drive, it will be down on power and might not idle very well, but it should still run.
1st Gear Member
Joined: Apr 2008
Posts: 125
From:
RE: Headers installed, loosing power!!
Okay, so you're telling me that if your cats are bad and your rear O2 sensors are reading funny it's not going to try to compensate for that? I believe this is the second time you've said that? If that's the case then howcome when you gut the cat's you'll get a code saying the rear O2's are rich and it'll lean out your engine? Been there, done that got the mother******* t-shirt.
1st Gear Member
Joined: Apr 2008
Posts: 125
From:
RE: Headers installed, loosing power!!
ORIGINAL: JD1969
Bank 2 lean could be a injector, could also be the front O2. The MAF code is saying somthing is wrong with your mass air flow sensor. My guess is that the MAF is bad and the car is running in limp mode. You should be able to unplug the MAF and the car will still run and drive, it will be down on power and might not idle very well, but it should still run.
Bank 2 lean could be a injector, could also be the front O2. The MAF code is saying somthing is wrong with your mass air flow sensor. My guess is that the MAF is bad and the car is running in limp mode. You should be able to unplug the MAF and the car will still run and drive, it will be down on power and might not idle very well, but it should still run.