p0301?

[mmuah]

I ran a diagnostic on this car I just bought:

2003 civic ex coupe 1.7 ltr vtec / 122, 000 mi..

Yeah I know alot of miles but I only paid 5000 for it.. the car is in excellent condition inside and out..

However, before I bid on it at an auction I noticed that it trembled a little bit, but drives nice.

The diagnostic code I got was : p0301

I know the possible causes are:

ignition wires/ plugs, coil
vacuum leak
injector fault
high or low fuel pressure

Can anyone eliminate any of these symptoms so that I don't have to spend the money fixing what I don't need to based on the tremble problem? Also, the gas consumption seems good thus far.

Thanks a million

Former 95 civic ex coupe 1.6 ltr owner/ current 2003 civic ex owner

Love my Civics =)