Thread: need help troubleshooting

the thing is its not throwing any code the shop that i took it to said that there was a code in the history when scan the pcm. i checked it the nite before with my scanner and it showed no codes. they drove the car with there scanner hooked up and said the maf was of by a few points pulled it out snd cleaned it csr drove fine the next morning driving home from work it stated to stumble again.

when i had problems with my car stumbling and a shaky idle, I replaced my fuel filter while my GF cleaned out my throttle body with a toothbrush. The problem went away.
My car also stalled sometimes when i started it.