Restricted exhaust & Engine Noise
#1
Restricted exhaust & Engine Noise
Now I have a 2002 v6 mustang. And by no means am I super car savvy. So My engine does this thing sometimes where my rpms go up and down at idle almost as if my car is going to die and it did once but that had fixed an issue... My exhaust is a lot less toned than when i got it installed.. Now last time when my rpms were doing this, my engine died, and then i turned it back on and my exhaust was loud again, lasted a week and now it's doing the same thing... what could this be? Are these linked or are they separate.
#2
possibly a blockage in the exhaust, low fuel pressure, low voltage to coil/plugs, IAC dirty/clogged....
What did you have installed with your exhaust?
how soon after getting exhaust work did the problem start?
when was the last time the fuel filter was changed?
when was the last time the plugs were changed?
how old is the battery?
how dirty is the air filter?
What did you have installed with your exhaust?
how soon after getting exhaust work did the problem start?
when was the last time the fuel filter was changed?
when was the last time the plugs were changed?
how old is the battery?
how dirty is the air filter?
Last edited by PNYXPRESS; 01-09-2015 at 07:20 AM.
#3
You can usually tell if you have a clogged exhaust with a $15 vacuum gauge in 15 minutes or less.
http://www.secondchancegarage.com/public/186.cfm
scenario 14 shows the reading for clogged exhaust
http://www.secondchancegarage.com/public/186.cfm
scenario 14 shows the reading for clogged exhaust
#6
possibly a blockage in the exhaust, low fuel pressure, low voltage to coil/plugs, IAC dirty/clogged....
What did you have installed with your exhaust?
how soon after getting exhaust work did the problem start?
when was the last time the fuel filter was changed?
when was the last time the plugs were changed?
how old is the battery?
how dirty is the air filter?
What did you have installed with your exhaust?
how soon after getting exhaust work did the problem start?
when was the last time the fuel filter was changed?
when was the last time the plugs were changed?
how old is the battery?
how dirty is the air filter?
#8
I would have your IAC sensor checked out first. When the IAC sensor starts to fail your idle will become erratic and the car can sometimes stall out at idle.
Another area to check would be the EGR sensor and valve. Same things are prone to happening when these go out.
Lastly, if those two check out, I'd check the OBDII sensors. While unlikely, when the OBDII sensors go out, weird things can occur with idle.
If all that checks out, then your issue lies with either the MAF sensor, AIT sensor, or a faulty injector(s).
Another area to check would be the EGR sensor and valve. Same things are prone to happening when these go out.
Lastly, if those two check out, I'd check the OBDII sensors. While unlikely, when the OBDII sensors go out, weird things can occur with idle.
If all that checks out, then your issue lies with either the MAF sensor, AIT sensor, or a faulty injector(s).
Last edited by jthorn9; 01-11-2015 at 07:04 PM.