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02-01-2013
I cant take it anymore. ive been avg. like 12-14 miles per gallon. i took it to the shop and they said it was the catalyic convertor.... so we changed that ... saw no difference.. so they said you gotta let everything get use to it.. so a month later same results.. i need some help.. im driving normal speed limits. one tank only get me like 215 total. so please if anyone has some advice.. HELP A BROTHA!):
02-01-2013
Upstream o2 sensor could be bad.
Replace plugs and wires also.
02-01-2013
Okay. im gonna try the Ngk plugs and i think the MSD wires... any opinon on the sensor? or anyone will do?
02-01-2013
hey im looking on advance autos website and they dont carry the ngk tr6ix... any good news about the tr5ix for the gxp?
02-01-2013
Stock GXP, needs stock ac delco plugs.
If you drive only city and the weather is cold, yes you arent going to get good mpgs in a V8 car.
02-02-2013
Thanks for sharing your problem.Was it really terrible?Whenever you encountered a problem like that better ask the expert.Determine what car to buy for your situation.
02-02-2013
Actually not to say fivefinger is wrong cause he by far knows way more about cars, but stock acdelcos work fine. But the ls4 runs way better with NGK tr6ix plugs gapped at. 035 . I didn't think it would at first but people over on gmls4 convinced me that I should go with em. Well sites true the engine does run better, idle better and my gas mileage was 1-2 MPG better. These plugs are 1 heat range cooler and are better even on the stock engine.
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