I'm trying to see what other people that have done the complete PI swap (Heads/Cams/Intake) are getting.
I have done the full PI swap(Heads/Cams/Intake)
Marauder T/C
'02 GT MAF w/ air tube
3.27 posi rear
Rebuilt Trans (300miles now on it)
Performance Lonnie Tune
- 180* t-stat
- 12C plugs
I don't think my gas milage is very good.
I'm having a miss problem that I posted about in another thread. [That might have something to do with this.]
I already replaced the fuel filter, air filter is brand new, PCV valve is new, new plugs.
Car has 113,000 on it but only 300miles since PI swap and tune.
No codes.
Ran like a beast with great gas milage before all of this.
Same here, my gas mileage is not impressive either after the performance tune no matter how much I baby it. Stock tune gets me about 1~2MPG more so far in the city. Highway seems to do about the same to 1MPG more with the tune, haven't had it much on the highway to confirm, buts its definately not 25+ like some people are getting. Performance tune gave a bit more midrange power and fixed the shift points, otherwise it ain't doing for me either.
I'd think O2 sensors actually, they do get worn out and if they are the factory ones they are almost 10 years old. I've never had wires give me any difference fuel economy wise.
I'm going to watch the fuel gauge the next few days to see if my milage increases. I might get those O2 sensors too; (just cause I got a friend at the auto parts store that can get me a "great deal" on them )
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