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  #1  
Old 10-08-2012, 11:18 PM
trevor216051 trevor216051 is offline
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Angry 01 Ram Exhaust Plugged Again

Ok, Here is my story.
About a year ago I drove up from Vancouver to Kamloops and drove around for a couple days hunting and fishing etc.... and on the way back up the Highway (Coke) The engine started hesitating under full throttle. Needless to say I had to nurse it back to home to figure out what was going on. After a bit of research I learned that my exhause was plugged. I got my cat taken off at a muffler shop and a straight pipe put in. This fixed it right up and it sounded pretty good too. Then after another trip up Kamloops the same thing.... I thought it might have been air filter but checked it and it was fine. I figured that it was the exhaust and also got the plenum gasket done at the same time. (ordered the one through hughes engines) I thought that would be the end of my worries. Now once again the same hesitation is coming and power is down to about 70%. Someone Please help me? Had to unscrew both O2 Sensors to get some flow there, and that helped. Any thoughts would be apreciated.
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  #2  
Old 10-09-2012, 09:59 AM
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Have you actually done a backpressure test to verify a restriction? If there is one and the converters are gone, I might suspect the muffler has deteriorated inside.
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Old 10-09-2012, 01:14 PM
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Default Re: plugged exhaust

Haven't done a back pressure check, just started doing this last night. I had to pull my o2 sensors off so my exhaust had some flow, which helped. I am pretty sure you are right that the exhaust is suspect. Brand new flow master, tho. Any ideas what could be causing the buildup? I had the new plenum kit installed.
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Old 10-12-2012, 03:58 PM
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Unhappy Rpms stay up with clutch in!

It turns out its not the exhaust like I thought. I guess I'm too used to the exhaust. Plugging up on me.

I re-routed a few plug wires so they didn't cross, which made a big difference! No more hesitation so far.

My other problem which happened at the same time is that when I am downshifting, my rpms stay up when the clutch is in and my tach hits 1500 to 2000 rpm and just stays there until I put it in gear or stop. Any ideas on this?
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Old 10-12-2012, 04:12 PM
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If the wires were jumping spark then replace them. Sounds like the truck needs some regular maintenance, a tune up. Start there, the cheap/easy things first. Any engine lights/codes?

Hanging idle is usually an intake leak/vacuum leak.
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Old 10-12-2012, 04:31 PM
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I have replaced the plugs, air filter ,plenum. I guess I will grab some new wires and throw those on. I do have a check engine light for smallleak in evap that has been on there for a while. My mechanic couldn't find it. Any ideas how to investigate this further?
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Old 10-12-2012, 04:44 PM
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I'd start with wires. I'm not familiar really with EVAP systems so don't know if it could cause any issue, I think it's purely emissions related. I assume you tried the gas cap? Is the code P0440? P0441? Gas cap usually fixes these codes. The rubber seal on the cap deteriorates with age.
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Old 10-12-2012, 06:52 PM
trevor216051 trevor216051 is offline
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Just replaced all the wires, took it for a drive, no hesitation but the rpms are hanging up when I have the clutch in and downshifting. Anyone have suggestions? Cleared the evap code and nothing else has come up
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Old 10-14-2012, 05:27 PM
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So the evap code didn't return?

As far as the hanging idle I'd think intake leak of some sort. Only other thing could be fuel issue like maybe regulator???
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