93BlackZ28

iTrader: (5)

Hey guys, lately i've noticed that when I start my car up cold it will idle down low and start to idle a little rough like it has a cam then it will jump up to regular idle and keep doing that until it warms up a little. Also if i get in and drive it while its doing this it kind of cuts out on when im driving noramlly. If i rev it up its fine and when it warms up its fine and runs great. Anyone have any ideas of what it could be? Bad o2's? Dirty sensor somewhere?

ss.slp.ls1

iTrader: (36)

Well after first start when the car is cold it is in open loop and it isn't using the o2 sensors yet. Once it warms up and switches to closed loop it utilizes the o2 sensors and MAF. You might have a problem that the o2's are compensating for when in closed loop...making it run better. Any codes?

93BlackZ28

iTrader: (5)

Well the SES light has been on since I did the headers so I don't know if it has thrown any other codes. I've looked before and I think it threw some kind of o2 sensor code though. I'll have to check.

ss.slp.ls1

iTrader: (36)

Yeah, scan it and post the codes.

blk97z28

iTrader: (3)

possibly TPS sensor? I agree scan it and post codes, then go from there. Could be the TPS, and numerous sensors.

Devin

93BlackZ28

iTrader: (5)

P0140- No activity in o2 sensor Bank 1 Sensor 2
P0135- Heat circut malfunction Bank 1 Sensor 1
P0160- Circut No activity Bank 2 Sensor 2
P0400- EGR

blk97z28

iTrader: (3)

i would replace that o2 sensor, the heater malfunction referes to the 02 sensor. I would get the EGR all tuned out by DYNO DAN asap.

http://www.obd-codes.com/p0135

blk97z28

iTrader: (3)

this will help with all your codes, hopes this helps.

http://www.performanceworks1.com/PDF...eters%20V8.pdf

93BlackZ28

iTrader: (5)

Thanks

93BlackZ28

iTrader: (5)

Someone who knows about this stuff please help! What should I do?

myltwon

iTrader: (1)

well sounds like the opposite of a typical o2 problem.

you removed the EGR on the car I'm assuming since you're running an ORY?

myltwon

iTrader: (1)

also did you make your own O2 extensions or buy them?

93BlackZ28

iTrader: (5)

The EGR has been removed and yes I ghettoed my own o2 extensions

the_merv

iTrader: (88)

How did you wire them..maybe you have a wire crossed. Are the back ones completely gone..the ones that would be behind the Cats if they were still there?

ss.slp.ls1

iTrader: (36)

Check the wires and connections to your drivers side front o2 sensor. If it all checks out, I would pick up a new pair of sensors and a pair of o2 extenstions.

The other codes, don't worry about them. You can tune them out later.

93BlackZ28

iTrader: (5)

They were wired correctly and there is no rear o2 on this car, just the front 2 in the headers.

I'll check out the wires. Last time I was under my car i noticed that the plastic wire loom I wrapped my o2 extensions in was completely melted and the wires were exposed so thats probably whats going on. Thanks for your help. I'll check it out and post up.

the_merv

iTrader: (88)

Yea maybe one crossed.

blk97z28

iTrader: (3)

i thought my fault code list helped quite well haha, I was thinking that he crossed a wire/02 sensor was reading bad.