92 Max

Well, hopefully by someone reading this thread. I have a slight hesitation problem from a standing start and slightly rough idle that I'm trying to track down the cause of.
I'm looking at the O2 sensor in the 92 SE. It tests just slightly off. When I do the O2 sensor test with the ecu and the check engine light I get about 10 light pulses in 10 seconds and the book indicates good is more than 5 in that interval. I noticed that the engine had to reach operating temperature before the O2 sensor produced any pulses.
I just checked the heater circuit yesterday and it showed 6 ohms resistance (FSM= 3-1000 ohms). While this is in spec, it seems awfully low for a heater. Does anyone have experience with these readings? Are they marginal or perfectly in spec?

Aaron92SE

iTrader: (128)

I doubt it's your o2 sensor causing the hesitation. Those readings are perfectly in spec and exactly what I've always gotten when testing my o2 sensors in this Maxima.

I'd run your ECU codes first. Then look into things like the MAF, coolant temp sensor, IACV, coil packs, and ignition timing. There are several sensors that you can check out.

I'd get a Factory Service Manual if you already don't have one. Try ebay.

Jeff92se

iTrader: (82)

I have a factory service manual and 3 rear coil pack for sale.

92 Max

I have a manual and have gone throught the usual suspects. I've tested the MAF per manual and it checks out, I've tested the coils and bought two new ones and run them on all the plugs without change, Cleaned and tested the IACV, set the timing, tested and adjusted the throttle sensor and switch, replaced the coolant temp sensor, replaced all of the vacuum hoses. The plugs all have good deposits on them, so I doubt it's a spark problem. I was hoping that it was a O2 sensor problem, since the heater was so low in resistance. If this is normal, then I must find other reasons.

rod_atl

with a bad o2 sensor my car ran perfectly, i had to change it because it would not pass emissions

cachejob

iTrader: (2)

Jeff92se i tried emailing you but it came back undeliverable. i'm interested in your factory service manual. does it cover the 92 se model? please send me an email to cachejob@gmail.com letting me know what you want for it. thanks.

Jeff92se

iTrader: (82)

My for sale thread. It covers 1992 se/vg. Since you are in BC, I usually lower the value for less customs charges.

http://forums.maxima.org/showthread.php?t=452684

eric93SE

iTrader: (1)

My 02 sesonsor shows 2 ohms for the heater, so your fine. If that sensor has more than 60k miles on it, it should be replaced. You'll see a nice increase in fuel economy.

If you've checked everything you could, then there is a good chance that an injector is either bad or leaking fuel into the cylinder. My engine idles very smooth after replacing all my injectors, it had an uneven idle before hand, the exhaust would make a buh-buh gurgle gurgle sound. There is a rebuild kit available through beck/arnley that has all the gaskets and o-rings required to do the job.

92 Max

Thanks Maximaers (Maximites?, Maximuts?) I guess the problem is somewhere else. The O2 sensor seems to check out per the above input. I had the injectors out and cleaned when i did the VTC rebuild and nothing changed in this problem. Then I replaced the rear three with new ones when I had a leakage problem (turned out to be "O" ring problems. I'm going to work on a hyperactive ABS next, then revisit this problem.

dude88888

I agree with eric93se. INJECTORS. Replacing them will solve your problem. It solved all my hesitation, fuel consumption, and rough idle.