480sx wrote:
Agreed, i cant believe someone actually thinks that one brand of spark plugs would make your car run like crap. The fact that he claims to be a Nissan tech is frightening. Id rather be a 'backyard mechanic' over one who believes that a brand of spark plug will 'instantly cause your cyl's to misfire'. Oh well not like i would ever bring my car to a dealer anyway, but still.
Also the fact that people would be buying into that garbage makes me question the human race.
'Uhh i think we found your problem, your spark plugs arnt the right brand. That'll be 500 dollars'
It makes me feel better that this thread was originally in the general chat, slightly better. Wheres WD when you need him!
Apparently I can't take a vacation...LOL.
I'm not sure where this thread derailed, but it's almost entirely worthless. I would hope that NO one listens to anything said in this thread because you'll come away confused and probably do more harm then good.
I'm going to make one post, then lock this because I want my post to be the last one that any noobs read.
Ignition can and will effect the way your car runs in ALL aspects. What I mean by that is from idle to red line with or without boost.
Mix matching used spark plugs on your car and then wondering why you have problems is ...not very smart. No offense, but c-mon. If the plugs are fouled then you have a problem.
For 8psi and under any decent plug will work in the stock heat range. If you go to cold, the plug can't burn off the carbon deposits. In this case, we're only talking about 5psi or under. So a stock heat range is fine.
Where gap is concerned the answer is very easy. Run the largest gap you can until spark blows out ON BOOST. If you are idling badly then you have either fouled a plug or the ignition itself isn't putting enough juice to the plug. In this case, swap the plug that's fouled or lower the gap of the plugs as a whole. I like to start at .035 on all of my boosted applications. It's enough gap to light off the combustion mixture pretty well and low enough so that the stock ignition won't have a problem handling the load required for the spark to do its job.
More spark equals a better burn. So by running the largest gap you can, you effectively increase your spark plugs efficiency. Which is another reason people use Amps.
Bosch plugs do not make ANY motor run bad all by themselves. There is always a human error factor involved. Be it choice of plug, or incorrect gap during install. Bosch is also legendary when it comes to things in the automotive world. They pioneered more things for fuel injection and ignition then ANY other company in the world...and that's fact.
NGK simply makes a great plug for boosted applications. No arguing that, hence the blind following it has received over the years. But to say that a brand of plug makes ALL Nissan's run bad is incorrect...period.
Also, anyone that says a FMU doesn't work is wrong. VERY wrong...
There have been years of documented use with excellent results. Running low boost and a FMU, especially the 8:1, is an excellent way to enjoy boost on a budget.
In short, change your plugs, gap them to .035, inspect your wires and change them if they are old. This should fix your current problems. If it doesn't, then make a new thread and we can at the very least, eliminate the plugs and wires as a possible source of the problem.
If you still have questions, make a new thread. This one is done.
WD
*EDIT*
I'm unlocking it just so it stays on the first pg for awhile. Be leary what you read.
