jci9zx

been awhile since i gave my car any love, figure oil, air filter, spark plugs, battery are in order.

battery is oozing acid, so thats got to go

what type of sparkplugs should i get? guy at kragen gave me NGK BKR5EGP, are these correct?

also, car started running rough, SES came on, pulled up code P1320, guessing coil is bad, code reader didnt give another code saying which one it was.
what are the part numbers for the coils?

i just got a new job and have to do alot of driving, need car to be tip top in a week

jltibbs

iTrader: (1)

NGK PFR5G11 (PN 2647) laser platinum instead of G-power Platinum. is code p1320 a coil code or a cylinder misfire code? if it's a cylinder misfire code then you should just replace the spark plugs, clear the code, and see what happens. otherwise i see no reason to replace coil. i have 205K mi on my 95 and still all factory coils.

sky jumper

stay with your Gpower platinum plugs. they will work just fine. OE laser plats are a waste of money -- for the same price you can get laser IR which are better, but you don't need either.

fix your coil before you replace the plugs -- otherwise you will foul one or more of the new plugs by the imminent misfire.

1320 is ignition primary. it means 1 or more coils is going bad (primary side transistor). your car is probably not misfiring yet - but it will soon. you can either wait until it starts to misfire, and then read the code for the specific cylinder. or you can try to determine which coil is bad by ohming the transistors -- this might not work if they are still firing, though.

change your transmission fluid (do you have an AT?).

EnervinE

iTrader: (11)

It's coils. He has a 99.

jci9zx

oh, its misfiring, im sure, sometimes it gets really rough and the light starts blinking, im gonna go get the codes read again. so theres no possible way its just hte spark plugs? because i can change those and if its fixed its fixed, i dont wanna blow $100 if i dont need took, SP's are only $3

jci9zx

what kinda tranny fluid? Mobil 1 Syn should be fine right? how many quarts? and how do i actually change all the fluid, wont most be stuck in the tc?

sky jumper

if it's misfiring bad enough for the CEL to blink then you should definitely have a cylinder-specific misfire code. check your codes again. and pull out your plugs and have a look-see. the cylinder(s) that are misfiring should have carbon fouled plugs. go ahead and replace those plugs and see what happens, but since you started out with code 1320 you definitely have a bad coil or two (bad plugs will not throw 1320).

yes, about 1/2 the ATF stays in the TC, internals, and ATF cooler (radiator) when the pan is drained. to get it all out you do a cooler-line exchange with about 1.5x the full capacity, or just do about 6 drain/fills with some driving in between. with both methods there is some mixing, less-so with the cooler xchange.

mobil 1 is a fine ATF choice, but don't dump it in right away. do 2 or 3 drain/fills with cheap supertech HM ATF to dilute the old dirty fluid a bit, then proceed with a cooler-line ATF change with the mobil 1 syn. since you can't avoid ATF mixing (even with cooler-line method) it's best not to mix the expensive mobil 1 with dirty fluid, hence do some drain/fills with the cheap stuff first. also consider dropping the pan and cleaning the magnets before the cooler-line xchange.

jltibbs

iTrader: (1)

so just because he has a 99 it's automatically the coils and not the spark plugs??? if you're implying that they are coils and not wires, i know this. i have a fourth gen as well.

jci9zx

i dont have any wires, just the coil per cylinder

talisman311

spark plug types have been discussed more times then pamela anderson has screwed someone... ought to make it a stand-alone sticky or something. the rule of thumb is platinums if you want to change it 100k or coppers if you don't mind changing them 30k. copper is recommended for boosted setups.
FWIW, i use copper plugs and change it every 25k. it takes less then a hour for me to change all 6 so being that they are quite a bit cheaper, i'll stick with the coppers. iridiums have been shown to provide no benefits on dynos from what i recall..

jci9zx

did all the 4th gens before the 99 use plugs and a distributor?

jltibbs

iTrader: (1)

94 was the last year w/ distributor. personally, i use the laser plats and still change them out every 30K anyways. call me stupid, but gas prices are too high to use copper.

sky jumper

the other poster's '99 comment was in reference to the bad batch of coils nissan used on the '99 model year. they are known to fail. it was not about plug wires vs. coils.

plug type will have no effect on fuel economy. copper plugs will give you the same MPG.

ThurzNite

iTrader: (13)

I changed from regular copper to 1 step colder and got huge improvement in MPG.
Jae

jci9zx

i heard about a bad batch on 00-01 models. dunno, i'd say 150k is pretty good. checked codes again. P1320 again, and a -300 code (random misfire), so it didnt listed a specified coil. shutting off fuel injectors, problem seems to be on cyl 3 and 6, gonna switch out spark plugs 2morrow, hoping thats gonna do it, if not, i guess im looking at 2 coils, wish me luck

jci9zx

why do those sparkplugs have to be under the damn intake. im totally buying a RWD car next

sky jumper

do you have an 00VI or something? plugs are a breeze to get out, unless you have a different intake. back bank injectors, on the other hand, are indeed under the intake -- so how did you shut #3 down? do you have access to consult? you're not mistaking injectors for plugs are you?

you still have 1320. about the only thing that can throw that code is a bad coil transistor (or a bad primary side connection). since you don't have a cylinder specific misfire code it is possible that you also have something else going on at the same time (faulty injectors, EGR problems, etc etc). many things can cause a misfire -- but you definitely have a bad coil or two.

99s definitely had shoddy coils. 00-01 may have too. coils should last life of vehicle, so 150k is really not too good.

jci9zx

no, they're just hard to get to

FERRIS

i am geting new plugs ASAP and i would like to get a new exhuast system. What exhuast system will improve my car with out makeing it sound like a rice rocket

jci9zx

well, did the plugs, problem came back after 10min. but i ran the codes again, this time it showed P1320 AND P0302, so looks like number 2 is going bad. i ordered a coil today, gonna switch 2 with 4 tomorrow and see if it makes 4 misfire so i know its not an injector.

Phaedrus220

iTrader: (4)

a blinking SES light is a sure sign of coil failure. I had this when I'd floor it on the highway, replaced the rear 3 with used coils from a 98, and I'm on my way.

Best exhaust for note, fitment, and quality is the cattman exhaust.

jci9zx

replace the coil, mis fires went away. car still idles a little rough when at low rpm's. think all the misfires caused any damage to the engine?

sky jumper

it's hard to say. there are so many things that could cause rough idle. you may want to check those new plugs you put in -- #2 could be gunked up with carbon from the misfire, even if you didn't drive it much or at all after you put the plugs in.

how much total time did you run the engine with the misfire? if more than a few miles I'd wonder about the O2 sensors, even though you're not throwing any O2 codes they could still be coated in deposits. CC deposits are another concern (look down inside #2 plug hole with a flashlight, is the piston top coated in carbon?). I'd also check your PCV valve. beyond that it could only be a few dozen other things...

99BlackMaxMS

iTrader: (85)

Could be an injector causing the misfire as well.

jci9zx

its pretty much gone away, i'd say its running fine now for a car with 150k