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I got a straight pipe put into my envoy for the muffler and now my truck trembles and is heating up? I want to know why?

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DIY Replace Back Muffler / Resonator with Straight PipeSubject: DIY Replace Back...


DIY Replace Back Muffler / Resonator with Straight PipeSubject: DIY Replace Back Muffler / Resonator with Straight Pipe
Title: Increase Fuel MPG by Replacing Back Muffler

Overview:
When your back muffler fails, and or if you want a bit more gas milage, replacing the back muffler with a straight pipe seems to work fine and increase MPG. This is much cheaper than purchasing a back muffler with DIY or to have a local customer shop install a straight pipe.

Symptoms:
Back muffler failing, onion peeling and / or holes in the back muffler.

Experience Level:
Medium

Tools Needed:
Hack Saw, Ratchets, Wrenches, etc.

Time Needed:
About 1 hour:

Parts Needed:
Pipe parts from local auto store. Exhaust sealers, hangers, pipe tip (stainless)

Procedure:
Remove the back muffler by cutting the pipe before the muffler about 2 inches in front of the muffler. Replace with straight pipe components or have a shop do it. You will need some time to get it 100% right. It took me a couple of tries.

Outcome:
- Money savings in replacement.
- Slightly louder, but not much. Actually a better sound (subjective)
- 1-5 MPG gas savings, especially on open road.

Discussion:
I have done this on a 99 9-5 I4 for about 1 year now and it seems to be working fine. I am getting about 3+ MPG on the open road since this was done. It is an automatic with 140k miles solid 29-30 MPG with regular fuel on the open road. I really do not see the need for the back muffler / resonator at the present time.

I will be doing this on a 2001 V6 wagon soon. The muffler will be failing soon.

on Jan 17, 2010 | Saab 9 5 Cars & Trucks

1 Answer

Exhaust question 93 silverado 5.7l 350. Singlr pipe Think its 3 inch pipe. There is no cat. On it and the muffler is cracked down the middle. Should i put a new muffler/glasspack in for performance reasons...


If you have no catalytic converter and replace the muffler with a straight pipe,, you WILL NOT BE ABLE TO HEAR YOURSELF THINK!!.. I took the converter off mine and it was SOOO loud.(have a Flowmaster dual outlet).. It WAS TOO LOUD.. I put a 28" "glasspack" inline..WHEW.. I can actually hear the radio now!!!

Flowmaster Mufflers

Jun 28, 2017 | Cars & Trucks

1 Answer

Glowing Converter/ Muffler Noise/ Power Loss


your cat is plugged remove it and replace with straight pipe or replace cat

Apr 05, 2017 | 1994 Chevrolet Camaro

1 Answer

I took my 1995 Ford Aerostar to have the flexpipe, muffler, and tailpipe replaced. I shopped around, and Budget Muffler in Kent Ohio stated that they would repair the care for $160+tax. When I picked...


You are right. The engine flexes differently, but not less. The designers that put the engine sideways also put the flex pipe in the design, and the shop is just saving money. I'm a mechanical engineer, and I can tell you the stresses on the joints will be higher without the flex pipe. I can't say for sure something will crack, but it is certainly more likely.

Feb 11, 2011 | 1995 Ford Aerostar

1 Answer

How to run the exhasut pipe on a 1999 alero 4 door 4 cyl


BEST TO LET MUFFLER SHOP DO THE JOB FOR YOU.BECAUSE EXHAUST SHOULD NOT RUN CLOSE TO FUEL TANK AND FLOOR PANEL FACTORY PUT HEAT SHIELDS UNDERNEATH VECHICLE WHERE EXHAUST RUNS UNDERNEATH.LET THE MUFFLER SHOP DO THE EXHAUST PIPE WORK.PIPE HAS TO BE BEND IN A WAY IT WONT DRAG HIGH WAY AND HIGH BUMPS IN THE ROAD.

Nov 02, 2010 | 1999 Oldsmobile Alero

1 Answer

My muffler system there is 2 or 3 emission part in the pipes from the exhaust to the muffler. can a straight pipe rplact those 3 piecies?


The only component that must stay in place to pass federal emissions is the catalytic convertor. If you are not concerned with emissions then a straight pipe will be fine. There will not be any adverse performance problems with a straight pipe. Please rate my help this helps me out , Thankyou RJ

May 30, 2010 | 1994 Ford Aerostar Extended

1 Answer

How do I remove a stuck muffler on a 1977 Ford F150? All of the clamps that connects the exhaust pipe and tail pipe to the muffler were removed.


You should use a hacksaw or sawzall. There is no way you are going to get it off by pulling a piece, by hand, that has been heat welded for 33 years of normal operation. Or just take it to a muffler shop.
Recently I bought my own muffler and catalytic converter and the muffler shop only charged me $60 to take the old ones out and put the new ones in.

Feb 23, 2010 | Ford F-150 Cars & Trucks

1 Answer

Tail Pipe Replacement on a 72 VW Beetle


Heat the area by the muffler with a torch. Try not to heat the tail pipes themselves. Then take a pair of channel locks and wiggle them out.

Jun 25, 2008 | Volkswagen Beetle Cars & Trucks

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