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Originally Posted by rubs
... try to find the exact issue?
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At least first check them out how they look, at least they should look equal. Go to ngk.com to 'read' plugs.
As u know, anything may break before expected time. When problem is intermittent, its worst kind: no way to know if problem is cured, and if it is, because u changed smtg, or just because u touched smtg (if you swap plugs or coilpacks).
With this kind problem, DIY is the only reasonable way to proceed. If u want to keep costs down, buy 2 cheap 2$ plugs(or whole set just for tst purposes). Swap places if problem re-occurs. If no hlp, buy 2 coilpacks, one for fron, one for rear, do likewise.
No warranty that plugs, coilpacks is THE issue. Probability is high... It may still be that u have other problem(s), juts bad connection. If not, then its time for sensors swap, one at a time. Goto junkyard for cheap troubleshoot parts. Testing the sensors (alas) will not hlp too much, as they surely will work when tested... (My guess is that there are 3pcs O2 sensors, by modding connector, u may be able to tst all three with buying only one, swapping)
Bad connections and whattodo:
http://www.cardomain.com/ride/748507/14
You may also try to use hairdryer to simulate heat effect on parts (coilpack, MAF) while idling. Careful.
Manual will be worth it; I think u may survive with 2k2 maxima manual from
http://www.phatg20.net/