I have a 04 na xfire
As of lately the cars has been stumbling when you step on it from a stop or under hard acceleration
All new plugs
Checked for vaccum leaks
Any ideas? im thinkin maf sensor

 

Have you changed the fuel filter?

 

No, think that might be the prob

 

Johnny, I`m having the same issue in first gear...I was thinking it was electronic related..but the fuel filter could be a cheap fix...I`m gonna try it & keep my fingers crossed...who knows ?

 

Now that u said electrical, im going to double check. I know i have the light icon on the dash that occasionally turns my traction control off. Im going to fix my bulbs to see if it fixes it

 

I still get the light bulb but all my lights are working. Car stumbles like a missfire still, and today it stalled out.
Brought new fuel filter installing it friday. And checked for vaccum leaks

New spark plugs pre gapped
Checked vac leaks
No check engine lights

Crank sensor?
Maf sensor?

 

Johnny, I added a bottle of injector cleaner & did a throttle reset..then drove it "like I stole it".:. Seamed to do the trick for me. Good luck, Neal

 

Put injector cleaner but didnt try the reset will give that a shot

 

Have you checked your license plate lights (there are two)? Those are normally missed when checking all of the lights.

 

Got the light off, it was a brake light that wasnt plugged in right
Then had my fuel filter changed, helped a little with the stumbling. Now it only stumbles until the car warms up

The mech told me it might need bigger injectors because it has cai 74mm throttle body & maf housing with baffles gutted and screens removed and tuned

 

do the throttle reset and then go drive it hard. see if it recalibrates the throttle control.

 

Changed the fuel filter and crank sensor. Car runs but while you drive itll jus shuts of, And power cuts off at 3k. I have the spark plugs changed about 4 months ago. Im lost as what the problem might be and theres no light or codes to b read

 

Sounds like it could be bad connections in the RCM.

 

if you have changed the cps and it is shutting down, then I have to agree, time to check out the RCM.... two things can cut power, the CPS and RCM.... A bad coil would create a misfire, or rough idle.... Since you have gutted the maf, that could be some of the idle/accel problems as well....good luck

 

I have just completed the RCM swap with "tithed1" fast and easy, painless. Check out the TBS stickies for RCM repair.

 

Jus checked my rcm, had bad solders. Getting it fixed hope this is the prob.
thanks for the info, i kno the dealer would of raped me