codes from auto zone

[Justin23454]

P0507
P0171
P0174
P0300
Ive found and fixed a vacuum leak, I also did change the plug and wires, so its probly the plugs, I spaced them, and I dont think I should have, Ill probly just go buy some more (iridium). When Im driving, my car sometimes seems like it sputters or something, it mostly does it when Im going alittle faster then cruising speed, ill try to get a video w/sound, but Ive tried it once and u can really hear it? Oh and also, my plugs hit on the headers and there isnt really any way for me to fix it... I dont know i that will cause anything.

[Justin23454]

also here is some more info, It mostly happens at the beginning of a gear (mostly 3rd) and when I press the peddle down very little it starts 2 stutter. any ideas? (and this didnt happen b4 the plugs I installed) But also, I got the SES lite turned off, and 30 mins later, they came back on (so I looked for something wrong and found the Vacuum leak, I fixed it and the lite went off) so now I have no SES lite on, so I wonder if it really is the plugs or something else, thanks.

[CM Hamrick]

Sounds like you may have cracked or broken one or more of your plugs when installing them. I would check them all, real close around the porcelin.

[Justin23454]

yer a smart one. I fixed it yesterday, and ya one was cracked :O

[Frost]

yer a smart one. I fixed it yesterday, and ya one was cracked :O

explains why that stang was a handful for ya...

[CM Hamrick]

Thanks, I'll take any compliments I can get.