Nissan Repair: Ignition wires/milage, fuel pressure regulator, isuzu rodeo

Question
Hi:

I have a 1995 Isuzu Rodeo. (there are not Isuzue experts on the site, but this is a general question) It is a V6. For some reason it is getting 10 miles per gallon. This seems a bit low. I've been thinking about changing the spark plugs and ignition wires.  The factory wires are 7mm. I've been considering getting performance wires, (either 8mm or 9mm) Should this make a difference in milage & performace, and is there a point when the wires are too thick? IE< would 10-12 mm be toomuch Why or why not?

Thanks  Eric

Answer
Eric,

An Isuzu Rodeo is an awsome car.  I would go back with stock wires as they work great.  I would use Autolite Double Platinum plugs on the tuneup and a factory cap and rotor.  Aftermarket caps and rotors are not as good in quality as the factory ones.  I would get a new air filter too.  And, since you are getting such low mileage I would use a fuel system cleaner and change the fuel filter too.  The factory wires are fine and work great.  You are not spinning the engine to ten grand so no need to go with larger diameter wires.  Once you do the tune up email me back with how it runs and the mileage.  You might need to check the fuel pressure regulator.  But, the engine you have is great and they have few problems.  I have seen them with over 200,000 miles on them.