1987 Max runs rough only when in gear

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Jan 16, 2010 | 02:02 PM

#41

countzero

Thread Starter

Member

Joined: Apr 2006

Posts: 73

Answered my own question, guess there's nothing wrong after all (except that the car won't run right).

"44 No trouble codes stored in ECU"
http://www.nissanforums.com/b14-95-9...ecu-codes.html

Jan 16, 2010 | 04:19 PM

#42

LastTraintoMEM

Junior Member

Joined: Dec 2009

Posts: 91

Quote:

Originally Posted by countzero

WELL....I see my thread has been hijacked.....

No problem, always good discussion and useful info.

Ok, I finally got around to checking the ECU codes (it's been *****in' cold here and I don't have a garage). That and <ahem> I've never checked these before and had to hit the manual to check the procedure, and I found this link in the FAQ: http://torquespecs.tripod.com/maxima_85-91_codes.htm

Darn thing is throwing a 44 if I'm reading it right, and that code isn't on the list I have. Anyone know what a 44 is? Wondering if I should disconnect the battery and start fresh...

Haven't touched the radio yet, not bothering with that till I can get it running right.

I hijacked the hell out of your thread! LOL

Feel free to hijack mine "1987 Questions" and check what was said in both. I am having the same problems, and I got some good info from some very informed people. My radio still doesn't work, but I got the tape deck going! The answer to the radio problem is in the thread.

Jan 18, 2010 | 08:22 PM

#43

Edge

Member

Joined: May 2002

Posts: 184

Quote:

Originally Posted by LastTraintoMEM

The sensor light is on in the dash. The manual says this is the exhaust gas sensor. Is this the same as a n O2 sensor? If it is, how many does it have? I see one on the front, but does it have another some where. What problems does this sensor being on cause?

This is a 3 wire O2 sensor. I just replaced my O2 sensor with 68K miles and it need it. 60K is typical wear out, so as mentioned before you might want to replace if it has the mileage. I got a little boost in performance and should see the mpg go up.

If you want to actually check the senor operation you can by counting the ECU LED flashes at 2000 rpm and the engine warmed up to normal. The LED should flash between 5 to 10 times in 10 seconds, but the more flashes the better shape the sensor in. The ECU is in the correct mode (1) to see the O2 flashes when you start the car. You can use 2 mirrors to see the LED from the drivers seat. Mine had 4 flashes in 10 seconds. I verified the ECU tests by measuring the actual rich to lean and lean to rich voltage of the O2 sensor. It measured .26 to .77 V with about 1 second for a complete cycle @ 2000 rpm. New the spec is 0.0 -1 v with cycling 3 times per second.