i own a 2005 ls 49k noticed the other day when i tried to pass another car engine surged now i first thought it migth be the intake i swapped but i removed it and reved it and it does the same it only surges when reved up now i suspect the fuel filter?? where is it located? can anyone help now i have no warning lights on or chimes but engine does surge

 

Define "Surge"??

 

Fuel filter should be located by the fuel tank under the car......

 

yah what do you mean by surge ?? does it just like die or something??

 

by surge i mean the rpms drop then go back up again continuasly as long as i am pressing da accelerator

 

Sounds like a problem with the Cat converter, 05 is kinda early, they usually don't surface until like 50 or 60 k miles. Take it to a shop, they can test the pressure in the manifold between the cat converter and the engine, if you take it to GM they'll know what you're talking about.

What happens? The engine tries to go faster, but it puts out more exhaust, which backs up due to a plugged Cat converter, and actually reduces power, so it makes the rpm drop... then it tries again... same thing... over and over, causing the 'surging' that you get. If you take it to gm they extended the warranty of the emissions systems, so if you're under 100k (I think that's how long it goes) then they'll probably replace it at no charge.... or get a high flow aftermarket, and they'll probably do the labor no charge, either way is a win-win situation. Better mileage, better power, boo-ya!

 

Lol, I JUST noticed you were at 49 k... sounds about right... let us know if that was the problem!

 

wow so it might bet the cat converter huh?? i checked it gives me this propblem at 4k rpms then the surging starts well i know that i still have warranty unitl i hit 70k i had my water pump replaced about 4 months ago no charge i will take it in this weekend and let you all know the outcome one of my concerns is will the dealer give me trouble becuase of the aftermarket intake i installed????

 

NO, if you installed a K&N filter, I guarantee that it will not void any part of your warranty.

I really think that no matter what the issue is, you will not have a problem with the dealer taking care of it for you.

Good luck!

 

X2. The KN Air filter will not cause you to loose your warranty on a cat converter. If they give you hell, point them to the Magnuson-Moss Warranty Act.

http://www.pt-tuning.com/policies/Magn-Moss-Act.html