shinobi_350z

iTrader: (1)

Hey Guys,

So I've had my 2003 350z for a few years and I kind of feel that it doesn't feel as powerful as it once did. Especially when I rev it out, where it used to pull hard to redline, it seems to not do that anymore or at least not in the way I remember - I could be concocting this, but I doubt it.

So what can I do to restore (or guarantee that I'm not loosing) performance in a 7 year old car.

Here's what I can think of:

• Change all sparkplugs
• Change the air filter
• Pop off the cold air intake piping and clean it out
• Clean out the throttle body
• Do a round of injector cleaner
• Oil and tranny fluid change to round things out (Mobil1)
• After all this, reset the ECU

What do you think? What big and obvious thing am I missing?


Thanks for looking,

350Zdj

iTrader: (3)

do a compression test maybe?

shinobi_350z

iTrader: (1)

Would I have the dealer do it or do it myself? I don't have the tools for it, I'd have to buy them.

And if my comp. test numbers yeild low in a specific cyclinder or two, then what?

Toby-22

iTrader: (25)

First thing is first have the codes read CEL or not. Cleaning the maf/throttle body made a night and day difference with my car.

davidv

iTrader: (2)

Agree. You do not mention miles. Maybe the motor is tired. The obvious thing you are missing is diagnostics. Get a compression check.

jaaf

iTrader: (3)

my car is starting to feel sluggish also..

noob question: what exactly is a compression test, how is it conducted? and if u get bad results how do u go about fixing it??

davidv

iTrader: (2)

The explosion inside the combustion chamber is supposed to stay inside the chamber. See: http://www.aa1car.com/library/compression.htm

shinobi_350z

iTrader: (1)

I have 62,000 miles on my car right now.

mw9

iTrader: (51)

how and what did you use to clean it, thanks.

PlatinumSR20

or brake cleaner...

DB350

What happens in the chamber, stays in the chamber

JHD102204

ever heard of sea foam?