maxxximum90

Ive had my car for about a year now 98 GLE, and ive done everything i can think of to try and make my car the way its supposed to run. Ive replaced knock sensor, EVAP charcoal canister and valve, fuel filter, new spark plugs, swapped tranny fluid to synthetic, PCV valve, etc. Yet my car does not accelerate or feel as good as my sisters 97 GLE or my moms 97 GLE which both have more miles than mine. Is there anything im forgetting to look at/change??? Im soo sick of riding around in a slow car. Help PLEASE!!!

ronin22357

iTrader: (14)

check out your coil packs

knight71

Try cleaning your Throttle body, also get a fuel injection service done.

maxxximum90

ive cleaned the throttle body twice and used seafoam a few times also. how do you check out the coil packs? sorry im a noob

Shift_Power

Its the coils, replace them all, they'll all eventually go anyways. No good way to test really.

maxxximum90

where can i get them for cheap? online? nissan dealer?

JDM_Maxima

it sounds like you tried changing everything ? you probly changed the air filter too. what kind of gas do you use? what about your trans? is everything good with that? the fluid good filter good?
if so, why not trying to maybe adjust the amount of air going threw the system.
you can adjust the throttle cables alittle or if you look there is a black screw around the tps sensor that you turn to adjust the amount of air being pulled in the engine.

BlueC

iTrader: (5)

I dont think its the coils. 98s dont tend to have coil pack problems, its just the 99s (in the 4th gens) that have it and some older 95s. I wouldnt start replacing coil packs, if it were a coil pack, you'd have misfires.

SSR Engineering

Yeah, this is a dumb question, but you are using premium gas right?

f550maranello2

iTrader: (2)

get ur injectors and coil packs checked and like the guy above me said you use premium right?

maxxximum90

i always put 93 octane in since i bought the car (1 yr ago). im not sure what the previous owner used, but i assume he used 91+ octane. the air filter is 1 yr old. i already tightened the throttle cable and it made it a little better; but the car just does not pick up like it should. im gonna try and test the coil packs and injectors i guess. i also had a CAI that i took off to see if that was the culprit, yet it made little difference.

Maxrod

I agree with BlueC, if it was your coils you would have a misfire and probably a check engine light. I am relpacing one of mine right now. Unless you have $450 lying around with no other use, I definetly wouldnt change them all. If you find it is a coil (unlikely) I got mine at autozone for $64.99 here in Detroit. Good luck

Shift_Power

You do NOT get a CEL from coils. Why I don't know. Well, you won't until the coil pack is so bad that its really misfiring. Hesitation is usually just a coil randomly acting up. I have a 99 Max and this is what happened to me. Eventually I left a coil long enough that it actually did cause a CEL, but it was frustrating dealing with the hesitation up to that point. You can get them pretty cheap on jerryromenissan.com, enter the promo discount so you get 20% off. Promo is "maxima"....try "email30" as well for a 30% discount.

Maxx, do you get a flashing check engine light at all? This is a good sign of coil problems. However, you won't get the CEL right away...only happened to me when I was flooring it and then it started to hesitate around 3000-4000 RPM but I kept the pedal pressed and then the CEL started to flash so I let off. If you get the flashing CEL, sometimes (sometimes) you can get a code if you get it diagnosed quickly enough. This may be an indication of which cylinder (coil) is bad.

Cheers.

maximus_pr

iTrader: (3)

why people think bad coils are just a 99 problem eventually coils go bad on any year i own a 97 and know for sure one of them is not working ok because i tried another coil(fron another max) and felt the difference right away a friend of mine owns a 95 with same issue 2 coils went bad

talking with a mechanic from a nissan dealer (who is also friend of mine) told me usually coils go bad because of using plugs other than the ones listed for your car,he told me theres a relation about resistance and ohms between coils and plugs makes sense thats why people using other plugs(bosh 2+,4+ autolite etc...) usually felt a downgrade in performance

BlueC

iTrader: (5)

Because I had a coilpack go bad at less than 50,000 miles. Coil packs should last a long time, so Id say its a big issue with 99s. It really depends on the milage with a 97 or 98, if theres high miles on the car then yes. In regards to the whole plug thing, My car had NGK platinums before I replaced them with Coppers (so for the first 55k miles it had the CORRECT plugs), so that shows that it was a poor design of the 99 coil pack.

maximus_pr

iTrader: (3)

you have a point there but my friend's coil went bad just after 71k , mine when i was over 110k

but just by looking at his car year you can't tell how many miles he have on his car he may have over 100k on his just like me 139k to be exact the last 39k accounted for only 1 1/2 year so if he drives as much as me he must have an rough estimated 104k miles very close to when my coil started to fail

BlueC

iTrader: (5)

True, I understand that part. But the main idea is, a coil failing under 100k miles isnt really common. Knock sensors are more common of failing, I just think replacing all 6 coil packs is a waste of money if you dont know the real problem. But yea, I realize that anyone can easily put 100k+ miles on a 98, so you never know.

maximus_pr

iTrader: (3)

but i never say he should replace them anyway,i just telling not to overlook that possibility

maxxximum90

i have just hit 95k. So, do i just check the resistance with an ohm-meter to see which coil is bad??? I just replaced the spark plugs from bosch to ngk coppers about 5000 miles ago.

maxxximum90

anyone know?

maximus_pr

iTrader: (3)

check coils like the haynes manual tells you

some people says that is not 100% accurate it worked for me after i did the test i found that #3 was bad but usable, 3 months later i swap coil with a friend a car felt a lot better still haven't bough coils yet

maxxximum90

do i test them while they are still inside the engine or do i pull them out????

wunfstmax

iTrader: (7)

I didnt seem to read it anyone elses post buy have you thought about replacing your 02 sensors...i had horrible hesistation and i replace my plugs coils and knock sensor... turns out i had a blown o2 sensor fuse...but it maybe your 02 senor

Ant96GLE

iTrader: (4)

Not only is that ignorant... thats just wrong


Yes there is a way to test them, its called a haynes manual... get a multimeter and test them out.

If you dont know what your talking about dont post up anything.

99's are notorious for bad coils. Just like any other car a coil can fail at anytime. Run your codes and see what you can pull up. Coils dont always trip the check engine light. Go on from there. Check your 02 sensors as well, they can cause the hesitation problem.

chak210

iTrader: (2)

You might have low compression, and another problem could that your tranny is going down.

killcrap

iTrader: (3)

ignition coils can go at any time. mose people say that ohm testing them is not a reliable way to test them. they are wrong. if they replaced the ones that had abnormal resistance and still had problems with hesistation. well they probably had other serius problems wrong with their cars. ohm them, replace them, and take care of your car.

maxxximum90

i had an electrician test it at work today with a digital ohmmeter. he said everything seems fine. so i made an appointment to drop it off at a local nissan stealership to see if they could find out why its so slow. i wish it would have washed away with the flood a few weeks ago.