code was 0171&0420 i fix it and also after fix got MAF code i bought brand one and clean throttle body and new sparks plug and swap some cores around still 30 mph speed and I can't pull a hill and when in first gear for take i have press gas pedal raise for the car to move and all gears move smooth none or tight and the car idle better but still only 30 mph ,so recent put motor treatment in gas and believe it or not i did get to 40 mph but it felt hard on the engine i floored tge pedal to get it blown out ,but what cause this and is the a fix if it not a clutch or transmission ,or is this a fuel problem
Check for a clogged catalytic converter and get a snapshot of live data to look for anything suspicious. (Also, a little punctuation in your post would help in parsing the details.)
what about the fuel pump ,could that play a role in my problem?
Yes, as can a clogged fuel filter. Change the filter if it's old. Check pressure at the fuel rail. (A badly clogged air filter would not help performance either.)
code was 0171&0420 i fix it
how did you "fix it"?
There's a good chance catalytic converter is kaput
It was the upstream C02 i watch scotty video and done it the same way ,and upstream is the one that sits behind the manifold