popping/exhaust
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Joined: Dec 2003
Posts: 2,315
From: NY...what a bad place for a nice car
popping/exhaust
so i changed my MAF and put in 02 sims to get my SES light to go off so i will be able to go for inspection soon, and reset the computer by unpluging the battery for a while
now when the cars cold at idle it will make this hollow popping sound in the exhaust, kinda sounds like a missfire
i did notice the sound will stop when the AIR pump goes off
the sound also goes away at idle as soon as the car warms up and goes into closed loop(closed loop right??
)
i havent gotten an SES light yet b/c i have to put some miles on the car , but when i did drive it i had no problems (other than getting a ticket lol)
my question is , is the computer still re-learning itself causing this to happen , could it be another problem
it did do this b4 hand but it was barely noticeable but is now worse and again went away when warmed up
now when the cars cold at idle it will make this hollow popping sound in the exhaust, kinda sounds like a missfire
i did notice the sound will stop when the AIR pump goes off
the sound also goes away at idle as soon as the car warms up and goes into closed loop(closed loop right??
)i havent gotten an SES light yet b/c i have to put some miles on the car , but when i did drive it i had no problems (other than getting a ticket lol)
my question is , is the computer still re-learning itself causing this to happen , could it be another problem
it did do this b4 hand but it was barely noticeable but is now worse and again went away when warmed up
Last edited by CamaroSS30thAnn; Mar 30, 2006 at 03:45 PM.
Thread Starter
Registered User
Joined: Dec 2003
Posts: 2,315
From: NY...what a bad place for a nice car
Re: popping/exhaust
Originally Posted by Ray86IROC
Running rich maybe and getting some small slight backfiring when the air pump is pumping oxygen into the exhaust maybe? No real idea just would make me wonder...
non of the sensors are being used upon cold startup right?
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Joined: Sep 2004
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Re: popping/exhaust
The problem will only be during open loop when the pump is running since you no longer have cats. Either live with it or remove the air pump. Don't know how this would effect your inspections.
You could replace the pump with a relay to aleviate the SES light problem.
You could also be a little devious if you need the air pump for inspection. Simply leave it on the engine but unhook the harness going to it. Connect a relay to the harness and the pump will not come on, the PCM will be happy cause it thinks the pump is still there and smog police are happy too.
You could replace the pump with a relay to aleviate the SES light problem.
You could also be a little devious if you need the air pump for inspection. Simply leave it on the engine but unhook the harness going to it. Connect a relay to the harness and the pump will not come on, the PCM will be happy cause it thinks the pump is still there and smog police are happy too.
Thread Starter
Registered User
Joined: Dec 2003
Posts: 2,315
From: NY...what a bad place for a nice car
Re: popping/exhaust
Originally Posted by speedygonzales
The problem will only be during open loop when the pump is running since you no longer have cats. Either live with it or remove the air pump. Don't know how this would effect your inspections.
You could replace the pump with a relay to aleviate the SES light problem.
You could also be a little devious if you need the air pump for inspection. Simply leave it on the engine but unhook the harness going to it. Connect a relay to the harness and the pump will not come on, the PCM will be happy cause it thinks the pump is still there and smog police are happy too.
You could replace the pump with a relay to aleviate the SES light problem.
You could also be a little devious if you need the air pump for inspection. Simply leave it on the engine but unhook the harness going to it. Connect a relay to the harness and the pump will not come on, the PCM will be happy cause it thinks the pump is still there and smog police are happy too.
haha yeah i kinda came to a conclusion that it was from running rich , i got a code for it
so now i have to figure out y