QuestionMy follow reply dissapeared so I'm writing again. Will try your suggestion......but am curious about a clean plug firing a weak orangy spark thinly and sorta slowly looking on car in question.
While same plug will fire thick strong bluish spark on Sentra. I'm just using #1 plug wire and plug well grounded to valve cover. After plug is fouled it will not fire on car in question but will still fire on Sentra. Isn't this causing unburned fuel and eventual total miss fire ?
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The text above is a follow-up to ...
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On a 92 Maxima it is way over rich....black carbon on plugs. Can clean and will seem to run fine till car warms up starts to miss black smoke fialy stalls will not restart (UNLESS I CLEAN PLUGS)
Also after stalling plugs when immediately removed are wet with fuel. The spark seem very weak...just a thin orangy spark. If I test them on another car (SENTRA)the spark is thick and bright white/blue. This leads me to believe I definitely have an Ignition problem. I chaged the coil though the ohm meter siad it was in spec. also changed transistor. Even the Distributor, cap too. Almost afraid to type next line...as all replaced parts were from salvage yard. I did them one at a time and symtoms remain constant. If distrib were defective in primary crkt,would not it fail altogether ? same with transistor. What do you suggest? Beside what is below?
Can you advise with a test to measure with volt/ohmeter?
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first, i will be straight forwardly honest with you. i cant specifically answer this question with a 100% guarantee. but as one nissan owner to another, i will give a few suggestions to what may be causing this problem. im having a similar situation with my plugs/misfire/hesitation etc. if i spray intake cleaner into my hose that is connected to the IACV the car will run perfect for about 2-3 days, PERFECT. then slowly the car will start to show signs of skipping, rough idle, and sometimes stalling about 4-6 days after the cleaning. i clean it again, and it runs fine...then problems appear. upon research, the IAVC only operates when car is "warm" it has nothing to do with cold start ..but i dont think the problem is the iavc, i think its the actual plugs itself (my situation). essentially, im cleaning the plugs at the same time. if they are coated in fuel than maybe your plug isnt burning off the fuel, or you might not have enough air (iavc) into the intake to burn off the fuel (ignition). i dont see any problem with using salvage parts, i commend you for saving a little %%%, trial and error becomes very expensive with nissans. i hope these tips help, its the best of my knowledge. good luck with it al, email me when you figure this out. xxp_sebby@yahoo.com
Answernow im definatly leaning towards my first suggestion. i think you arent getting the proper fuel/air/spark ratio and are flooding the plugs. i think air is your culprit. even based on what you said, you tested your coil and its in spec (working) you replaced the cap and i assume rotor (working). apart from the intake situation (which i think is your problem...the only other suggestion i can make is to see if you could borrow a distributor, maybe even 2 from a junk yard and swap them out to see if that changes your situation. every car has a different way of throwing spark so in relation to the test you have made, its possible its just the way that car operates. the situation with swapping the plug to test on the sentra, you also have 3 other 'working' plugs to make up for the soaked plug you installed.
here are a few links that may help you out.
http://forums.maxima.org/showthread.php?t=465638
http://www.carsurvey.org/viewcomments_review_49073.html
http://www.maxima.org/modules.php?name=FAQ&myfaq=yes&id_cat=1&categories=General
i hope this helps some. good luck...very informative write ups. i would have replied sooner but i had to read them myself ;)
