changed plugs and oil, have some questions.

J

jmd2914

Founding Member

Sep 6, 2002

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Napa, California

Aug 19, 2006

#1

• Aug 19, 2006

• #1

I swapped out my bosch plats for some correctly gapped autolites ( .054) and i changed my oil from a 10-40 to a 10-30. the car seems a bit faster not sure why but i think it backfired once or twice when i downshifted on the highway. i couldnt get it do it again after that though, is this normal? and there is some stuff on my x pipe, looks like corosion from the o2 sensor to the cat. what is this?? is it bad? thanks guys. :SNSign:

 

daddystang

New Member

Aug 13, 2006

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Aug 19, 2006

#2

• Aug 19, 2006

• #2

How old is your x-pipe? May be just normal wear and tear. Was it a backfire, or just sound like rumble out the tail pipes. Mine makes a rumble sound when I down shift sometimes, and I've heard others do the same thing. Good luck..

 

J

jmd2914

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Sep 6, 2002

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Napa, California

Aug 19, 2006

#3

• Aug 19, 2006

• #3

xpipe is a acouple years old and i downshifted kinda hard so it might have just been a loud rumble, i run race bullets dumped so sometimes its hard to tell

 

3

310stanger

New Member

Aug 15, 2006

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Aug 19, 2006

#4

• Aug 19, 2006

• #4

the car feels faster cause autolites are a good plug and bosch sucks. i get cars all the time at work that misfire and they have bosch plugs. they are overpriced pieces of crap.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

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Aug 19, 2006

#5

• Aug 19, 2006

• #5

I'd chalk up the afterfire to having such an unmuffled exhaust. The cats and more sedate mufflers normally knock down farts that are otherwise heard during transient maneuvers (like a down shift).

Good luck.

 

J

jmd2914

Founding Member

Sep 6, 2002

937

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Napa, California

Aug 19, 2006

#6

• Aug 19, 2006

• #6

it does feel faster, but when im in neutral and i rev the car to like 1800 and let it down it sounds almost like its backfiring but not loud, almost like a puff opposed to the loud crack of a backfire, if that makes sense.