fludder from exhoust?
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Elder User
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fludder from exhoust?
I have just removed the cat, but the truck sounded so much better i had a shop take the muffler out too. I did have stock exhoust 3.5 in but I am noticing a fluttering from the exhoust almost sounds like a weak cylinder, I do have a slightly rough idle, but with rpms over 1,100 it smooths out and you cant feel anything. I don't know too many peaple in the area with a 7.3 so I can't really compare it to them. It sounds beutiful I am just wondering if this slight flutter is normal? or should I be looking into that shake at idle?
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the shake is not very strong. this is my first deisel, owned it for a year now and it is also the first truck I am modifying (I am a mechanic so I get alot of peaple come in with bad/blown up engines because the mods were not done right/not healthy for the vehicle) and i dont have anyone to compare it with so I was not sure. first thing that came to my mind was valve issue, but if you say it is normal i may just replace grey cps with black and see if there is any improvement and leave it at that.
I believe the shake is due to the grey cps. ordered one from deisel site over a year ago when I got my ww and never saw it.
It is a slight shake that at idle you can feel the truck rock a little if you sit and look at hood. it is a 6spd so the idle is a little lower than autos.
I believe the shake is due to the grey cps. ordered one from deisel site over a year ago when I got my ww and never saw it.
It is a slight shake that at idle you can feel the truck rock a little if you sit and look at hood. it is a 6spd so the idle is a little lower than autos.
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Joined: May 2008
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I'm just took off my muffler, and there wasn't any cat, so I'm running around with a stock downpipe and about 3 feet of 3.5 exhaust tubing past that, just dumping under the middle of the truck.
It flutters like a crazy thing...especially at idle, the sound is very choppy and harsh. Pretty sure it's normal, because the only thing I ever changed before it started was the exhaust, and the engine runs as smooth as I could want it to.
On the shake at idle thing, I'm really not sure. If you're near someone with autoenginuity, maybe doing some scans might be a good place to start?
It flutters like a crazy thing...especially at idle, the sound is very choppy and harsh. Pretty sure it's normal, because the only thing I ever changed before it started was the exhaust, and the engine runs as smooth as I could want it to.
On the shake at idle thing, I'm really not sure. If you're near someone with autoenginuity, maybe doing some scans might be a good place to start?
Post Fiend
Joined: Feb 2008
Posts: 10,977
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From: Lancaster, Pa.
Like the guys mentioned, the fluttering exhaust is normal, you opened up the exhaust and things are breathing now, thats a good thing. As for the slight rocking, a fuel filter change and a few other preventitive maintence items would be a good idea. A bump for you on more feedback..
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I apreciate the feed back i was a little worried about the chopping becouse since i bought the truck it almost felt like it had a slight miss, and with the pcm throwing a code p0605 I don't trust it and now with it throwing code p1670? from the sounds of it that is a idm problem, and I have also noticed that since I started throwing that code (i think it is p1670) I do not smoke even at full throttle. That is part of why I decided to go straight pipe all of a sudden I wanted to see what was coming from the engine. I thought if there is a fueling/missfire issue it would help to monitor the exhoust.
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