Check engine light and rpms drop really low then jump over a thousand then

[x300zxturbox]

shakes like its going to die runs really nasty and rich. i just changed my maf maybe it isnt good also i don't know. It runs fine till it gets to running temp then just starts acting funny with the rpms and like its gonna die shakes.

[SpeedFreak_Josh]

When you start your enine (cold), the computer runs preprogrammed parameters for air/fuel mixture called "open loop". Once it warms up, It runs "closed loop", or uses the cars sensors. IE- MAF, O2, ECT, etc. If you just installed a MAF I would check there. If it's reading the wrong air charge, it'll give the wrong fuel charge hence -rich mixture.

[x300zxturbox]

i just bought a new one and its doing the same thing i guess ill check o2 and whatever

[SpeedFreak_Josh]

Was the problem present before you installed the new MAF? Why did you install a new one??

[SpeedFreak_Josh]

O sorry, and what code are you getting??

[quietkilla6]

i had that happen and it was an injector and i had a cylnder out because of it but after i got it fixed my rpms just jump randomly at idle from funning 800rpms to 2000 then they drop to 1500 then back to normle i kinda feel a shimmy down by my one piece drivshaft.... damn Zs

[bp]

where is MAF located on engine?