longtube install problem

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Jul 25, 2006 | 01:48 PM

285LT1

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longtube install problem

i have a 99 SS and i just installed pacesetter longtubes and tsp true duals. i got everything done and drove it around the block and it runs like complete crap. sounds good its not missing the plugs are tight. i have the two sensors hooked up the the collectors but thats it im not running the other to that hook up to the stock cats. the car feels like im towing a house behind it. do i need a tune? help me

Jul 25, 2006 | 03:14 PM

alan2000T/A

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From: NW, Georgia

yeah, you probably do need a tune, but that's not causing your extreme issues at hand. There's got to be something loose somewhere. Did one of the spark plugs or 02 sensors break?

Jul 25, 2006 | 03:25 PM

SS4Luck

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From: Sterling Heights, MI

yea not having a tune wouldnt hurt you that much, you would still feel a power increase from the install

but towing a house? something else is wrong

Jul 25, 2006 | 03:29 PM

RoastEmSS

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From: Kansas City, MO

are you throwing any codes?

Jul 25, 2006 | 05:07 PM

sethhatfield

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It doesn't need a tune until you find out what is wrong with it. My 99 liked the Pacesetters immediately.

Jul 25, 2006 | 05:18 PM

slowscott

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A tune only added 7hp for me and it ran fine before hand. Look elsewhere first.

scott

Jul 25, 2006 | 07:07 PM

novass72

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From: Overland Park, KS

oh great, I have a 99 ss and just bought pacesetters and TSP Duals yesterday! ****!!!

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Jul 25, 2006 | 07:35 PM

tylerz28ss

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I don't know if you have any vibrations, but mine has plenty:

I can rev to about 3k, let the clutch out and stomp it and my '98 ss won't even spin the tires...

runs decent any other time...I think the knock sensors are picking up on the vibrations and sensing it as knock and retarding the timing...

Jul 25, 2006 | 07:55 PM

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ls1muscle

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From: Birmingham, AL

I remember when I first got longtubes + true duals, the first time I went WOT it was slower then before. After putting more miles on it, the PCM learned what was going on and adjusted, runs very good now without a tune.

Jul 25, 2006 | 08:01 PM

#11

bigman

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a tune netted me about 15 additional horses and about 20 lbs ft of tq. But your car should have been running fine. Did you check and recheck all the plug wires.