dual exhaust

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Jul 2, 2005 | 03:53 PM

ctspruill

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From: washington nc

dual exhaust

I have added dual exhaust to my 2002 f150 5.4L and it sounds good above 1200 rpm's. but it sounds like cramp at idle. it almost sounds like the left bank of the engine is sucking in , while the right bank is blowing out. anybody have any suggestions.

Jul 3, 2005 | 05:09 PM

LxMan1

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From: Louisville,Ky.

Did you put true duals or a cat back system?

Jul 6, 2005 | 06:40 PM

justinsinternet

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well i want to know ??? i have a cat back system and one side <rh> will blow you over and the left is just there for looks whatcha think??? it does have very little air coming out i mean very little on the left side

thanks guys i was hoping there wouild be more info on this post , i guess there are few out there with this problem my outlook is i did nothing to improve my perfomance.

thanks justin
98 f-150 4.2

Last edited by justinsinternet; Jul 6, 2005 at 06:43 PM.

Jul 7, 2005 | 08:21 AM

nk_f150

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Its possible the exhaust tips are getting uneven air flow due to how the pipe is bent when it was run The exhaust will run more quickly out of the side with less constriction. I don't know whether you are running a muffler but a poorly constructed Y pipe could cause the uneven air flow as well.

Jul 8, 2005 | 08:23 AM

ctspruill

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From: washington nc

I installed true duals . 2.5 inch pipe,short glass packs and 3.5 inch tips 16 inches long

Jul 8, 2005 | 09:11 AM

spikedog

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From: Wyoming

Maybe you have a problem with the engine, not the exhaust. Are all your left bank cylinders firing?

Jul 8, 2005 | 11:41 AM

BillyBob69

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From: Wheatland, Mo

If the left bank cylinders were not firing I think tha post would of been where to get a good rebuild. As for the un-even pressure, the length of the pipes will make a difference in sound IF you were running cat back 1 split into 2. True duals should blow out the same on both sides. On the end of the pipes, duct tape a small piece of cloth so it hangs over the ends. Fire it up and check them out. You can tell what it is doing with the movement of the cloth. It could be just sounding a bit different. But if one side is working ALOT differently than the other, then get it checked out.