Sluggish after exhaust! Why?

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yomny

New Member

Dec 10, 2003

22

0

0

Dec 30, 2003

#1

• Dec 30, 2003

• #1

I did some search but i really couldn't find anything on why the car feels asleep sometimes after i put the exhaust. The car is a 01 GT and it only has a ful exhaust with x pipe no cats and flowmasters ( 2.5" piping). Sometime si feel the car not as responsive as it used to be, another times it runs nice. I also smell gas from the exhaust, but it smells really strong every now and then. I know the smell coudl be due to the lack of the catalitycs but is it normal for it to be this strong. My car is completely stock besides the exhaust. So in conlcusion why does the car feel dumb sometimes. One more thing, what is modular, i hear about the modular 4.6 alot? Thanks for your help and tak einto consideration that im new to the mustang world, take it easy on me. Thanks for your help, in advance.

Regards
Yomny.

 

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Solid Snake

Banned

Nov 26, 2002

940

0

0

GA

Dec 30, 2003

#2

• Dec 30, 2003

• #2

Sounds like theres a leak somewhere

 

Sam98

Founding Member

Mar 15, 2002

1,625

1

0

Albuquerque, NM

Dec 30, 2003

#3

• Dec 30, 2003

• #3

Mine has that smell too, but I know that it isn't running too rich. Loss of low end torque is normal, because the back pressure helps at lower RPM. It may just take a little while for the PCM to re-learn how to keep the A/F right. Hopefully that's all it is...

 

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yomny

New Member

Dec 10, 2003

22

0

0

Dec 31, 2003

#4

• Dec 31, 2003

• #4

hope is all that, i mean the car is basically new, i dont' think it should have any problems, now what is the PCM, and can i make it learn faster maybe by resetting the ECU, by disconnecting the battery or something. Thanks a lot

 

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el_kid_1

New Member

Oct 30, 2003

738

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0

Puerto Rico

Dec 31, 2003

#5

• Dec 31, 2003

• #5

It could be a leak. When I installed my LT headers, my car wanted to eat the pavement. One more thing, did you check your o2 sensors?

 

70stangcoupe

Founding Member

Nov 12, 2001

2,895

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0

Winston-Salem, NC

Dec 31, 2003

#6

• Dec 31, 2003

• #6

And to answer your other question... the 4.6 is called modular because there it is an OVERHEAD CAM motor, not in-block cam like most older-designed motors. The 4.6 doesn't utilize pushrods.

 

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yomny

New Member

Dec 10, 2003

22

0

0

Dec 31, 2003

#7

• Dec 31, 2003

• #7

You mean exhaust leaks, i dont' think there are any, i was there when they intalled the exhaust, the guy made sure everything was really tied up, the 02's i should check the upper ones right,the secondary ones most likely will read lot of gas and throw the CEL soon since i removed the cats. But I'll check them to make sure they're all connected, thanks for all your help/info.

 

03trubluGT

New Member

Nov 19, 2002

1,067

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Mansfield, TX

Dec 31, 2003

#8

• Dec 31, 2003

• #8

el_kid_1 said:

It could be a leak. When I installed my LT headers, my car wanted to eat the pavement. One more thing, did you check your o2 sensors?

Click to expand...

My car almost scared me after the new exhaust. The dyno showed that I gained almost 23 rwhp and 19 rwtq.

Matt