Noise outta the intake (is it serious???)
#1
Noise outta the intake (is it serious???)
Hey guys been having this problem for a while but all of a sudden the noise was getting louder and louder to the point that if i'm at a stop light I can hear it. It sound like a backfire something like a blupp blupp blupp I have no trouble code and the cars running like its old crappy self but I'm just concern it may be trouble lurking down the corner and if I prevent it might as well take care of it now. Oh yeah and it only happens while idling. Thanks
car info:
03 expy, 4.6l, 120, xxx miles, k&n sys
car info:
03 expy, 4.6l, 120, xxx miles, k&n sys
#2
You sure it's coming from the intake? The only noise that I can think of is one that the PCV valve makes when partially plugged. If you have a scanner, scan it anyway, -you may have something pending. Without a DTC it's hard to say. If she's running bad @ idle, I would check the EGR valve.
Make sure your engine light is working. Turn your key to run, it should illuminate regardless.
Are you up to date on your fuel filter ? The fuel system would be the next to check out. Check pressures. Also, makes sure the MAF is clean.
Make sure your engine light is working. Turn your key to run, it should illuminate regardless.
Are you up to date on your fuel filter ? The fuel system would be the next to check out. Check pressures. Also, makes sure the MAF is clean.
#4
#5
I did most of the maintenance less than 500 miles ago I don't move the truck as much anymore so I'm sure it ain't any of that or I hope it ain't. The only code it throws is a p1000 but thats probably cause I had a vacuum leak and I haven't ran the truck more than 5 miles after that.
It ain't a howling noise its more like when you submerge something under water like a bottle and the air bubbles are escaping. I'ma see if I can find a way to record the sound. If its eating up antifreeze will that be a problem. . .THANKS GUYS
It ain't a howling noise its more like when you submerge something under water like a bottle and the air bubbles are escaping. I'ma see if I can find a way to record the sound. If its eating up antifreeze will that be a problem. . .THANKS GUYS
#7
Just throwin' this out there for comments....
This:
Plus This:
Equals trouble, imho ...
I do not believe in coincidences. Have you checked yer oil for water, and/or checked yer overflow tank fer oil?
Good luck.
MGD
This:
Equals trouble, imho ...
I do not believe in coincidences. Have you checked yer oil for water, and/or checked yer overflow tank fer oil?
Good luck.
MGD
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#8
Nope no water in the oil or oil in the antifreeze . . . I asked a mechanic friend and he says it maybe a head gasket (due to the fact that I told him about the antifreeze which he says may be going out the tailpipe) so i took out the oil last night and since there was no water into it i threw it back in this morning. But theres no white or blue smoke so thats why I hope its not the gasket . . . THANKS