Run a compression check. If the compression is up the cam timing is probably right.
Yes, "sparkling plugs" is definitely detrimental to idling or smooth running of an engine
it could be your timing is off
Check your spark plugs and leads.
Vaccuum leak somewhere
A bad exhaust will cause gas fumes to get inside the Nissan Maxima while it is idling. Gas fumes, if contained in an enclosed space, is dangerous.
i just payed $450 for mine and it has idling issues..searching for knock sensor location now...
replace the carburetor idle speed electrovalve. Should pay about $3.00 for a new replacement part.
The bad idling may be due to a faulty Throttle Position Sensor (TPS). Have the computer scanned for trouble codes to confirm before replacing.
May be that one of the cylinders is not firing. Check spark plugs for oil/any other obvious damage.
There are several things that can cause your 1993 Nissan 300 to idle rough. The most common cause is dirty spark plugs. Bad spark plug wires can also cause the problem.
A PCV or connecting hose problem can cause great issues with a 1997 Nissan pickup idling. In fact, this can keep it from running, even if it does start, and the engine turns over.
my idling on my 2001 ford focus is not idling correct, tried to adjust idling but there is no screw or way to adjust why?