My 03 Nissan Altima wont get over 2500 rpms

You need a tune-up, ignition, timing, fuel supply adjustment.

It sounds like you have a problem with the AWU. Accelerator Working Unit, a fancy term for the gas petal. If it is not getting the proper voltage to the ECM it will default to a RPM like you are geting, 2000-2500 rpm. Find one from a junkyard and try it out. I would not shake anything that will just cause other issues.

spray plug wires with a water bottle and have someone power brake the vehicle the plug wires are the likely cause under load spark is hotter than at idle and has a breakdown

VERY interesting ... Rodney2764,

I HAVE seen similar issues before...

Everything else seems to be good. I would be
thinking about having an EXHAUST shop look
for a loose MUFFLER baffle or collapsing
CATALYTIC CONVERTER...

A rusted or loose part inside can COMPLETELY
block EXHAUST OUTFLOW...

It is not a COMMON trouble... but certainly worth
the look (while you are mobile (my opinion...
RATHER than WASTING time & money
buying A WHOLE lot of UNNECESSARY oxygen
sensors ( get mistakenly replaced )...

(( from "FREE" code readings )).

((( really difficult to resolve when you are immobile ))).

Hope this helps...

Carnac the Magnificent

It should be around 2000 RPMs. Sounds like it's not going into overdrive. Probally an enternal problem.

sounds like your carb is getting to much air some where check your hoses

No....the rpms differ from engine to engine and from manufacturer to manufacturer. RPM's are always higher at higher speeds.

its becouse the cars computer tries to heat its self for it not to work when it is too cold
so just leave it there for a while till the rpm go to normal




by kevin

bad mass air flow meter replace it also check for a ecm update at the dealership goes by vin pretty common problem

I tell you how to fix it.
You drive 110.
You crash, and die.
My fault.
No, thanks.