Nissan Maxima belt issues

My Nissan Maxima harmonic balancer pulley has rubber formed all the way around the pulley, there are no grooves for the belt.

I’m trying to put a belt on the car, but the factory belt for the car is to loose with full tension on the belt, (about a inch of play) I got a smaller one for the car (about a inch shorter) now its to tight with the tensioner all the way up and it will not fit. Now ive noticed that the pulley (harmonic balancer) has rubber formed completely around the pulley and no grooves for a belt. please help!!! My car has an automatic transmission.

Answer: If you have rubber formed all over that pulley it is most likely that the belt was rubbing due to another pulley not inline with it, if they are then the harmonic is either bent or not installed correctly. Or the old belt has deteriorated and left behind belt material filling in the grooves so you can’t see them.

You can use brake cleaner and a wire brush to clean up the pulley so you can have clear access to installing the OEM belt size. Check all other pulleys that there is no build up on them to prevent or cause this problem.

Nissan Misfiring

The engine light is on my Nissan. The car is misfiring on gear 2 and when idling. Once I switch on the A/C its like it will stall. I have checked the spark plugs and they are ok. I have installed new ignition leads.

Answer: You need to have the computer codes scanned to see what codes are stored. It will have a P0300 or similar. That will tell you what cylinder has the misfire. Then test the ignition spark and fuel system for that cylinder.

You could also remove the spark plug wires one at  time with the engine running to see what cylinder is not effected. That will be the one that has the misfire since disabling it did not change the engine RPM at all, so it was not working to begin with.

If you have misfires then the car could have bad ignition coil if your system feeds 2 per coil. This will for sure cause the engine to stall.

If the ignition system is good, then you would need to check for fuel injector pulse signal. This is done with a test light or similar tool. If no signal then a wiring problem or computer going bad is your problem.

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