chris2wire

i put slp loudmouths on an 06 GT and now its got a bad idle. is this normal? any suggestions?

bl1nk

What the hell is a "bad idle"?

Arwing

Explain

chris2wire

sorry, i mean it has a rough idle when sitting at a light or something. flucuates like 200rpm. i can feel the car shake/stutter a little. began happening right after install. any hope or is my car destined to be stock?

bl1nk

Im not sure about the rpm change, but as far as vibrating/noise, it is most likely the hanger vibrating against a piece of metal underneath the car. Try trimming the hanger or retracting the tips a little and see if that solves the shaking problem.

jettaflavor

There is no physical way an exhaust could effect the rpm...

atleast there's no way that I could think of.

The two problems sound unrelated.

2cokeman

COINSIDENCE!! for sure, but Why do the instructions always tell you to unhook the battery because the computer has to learn the new mufflers??

05 Mustang GT

Any other mods? I recently installed my CAI and tune and the car does hunt +/- 200 rpm at lights. You can hear the engine rpm change. Fred from Evo said it was normal?

chris2wire

its my only mod.

but thanks for your help guys! i guess its not that unheard of. ill try disconnecting battery since i did not do that. i wish i had gotten in on that groupbuy! but i bought the SLPs right after i bought the car, hadnt even found these forums. anyways thanks!

Drop Top 06

Funny, I didn't disconnect my battery when I installed my exhaust (stingers) and they turned out ok. I know when my mazda had RPM problems it was the EGRvalve, but I would think it unlikely to happen already. Did you accidently move any of the pipes when you were doing the install?