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,

 

do a compression test maybe?

 

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?

 

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.

 

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

 

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??

 

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

 

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

 

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

 

or brake cleaner...

 

What happens in the chamber, stays in the chamber

 

ever heard of sea foam?