Alternator belt slipping?

[wolf_06]

If the alternator belt slips a bit, when there's a load on the engine at highway speed, like downshifting & passing cars, can the engine miss due to of a lack of power from the alternator, because of the belt?

Is this possible?

Thanks!

 

[Cardenio327]

No.

 

[Trav]

No. You probably have other issues like eroded spark plug gaps or something else breaking down under load or higher RPM.
How many miles? Are the spark plugs original?

 

[wolf_06]

134000 km, new spark plug, new O2 sensors.

I would blame the map sensor or tps sensor, its only intermitent on a load, sometimes its fine, sometimes it jerks for a fraction of second when downshiftting, like the engine is chocking kind of.

 

[Trav]

Did you clean the throttle body? Clean the MAF? Try a bottle of Techron or Redline in the tank, the injectors may be a bit dirty.
Any CEL?

 

[Rand]

Originally Posted By: Trav
Did you clean the throttle body? Clean the MAF? Try a bottle of Techron or Redline in the tank, the injectors may be a bit dirty.
Any CEL?


I'd start with that but add a caution. make sure you clean those items with the proper cleaner(s).

 

[cat843]

The alternator belt should not be slipping. Fix it but avoid belt-grip spray.

The battery can carry things if the alternator should stop putting out anything.

 

[wolf_06]

Originally Posted By: Trav
Did you clean the throttle body? Clean the MAF? Try a bottle of Techron or Redline in the tank, the injectors may be a bit dirty.
Any CEL?
Yes I had put STP full system cleaner, I have no MAF, only a MAP, CEL code p2096, lean fuel trim bank 1

 

[LeakySeals]

What else is on that belt? Are you sure the belt is slipping vs something else on the belt binding up?

 

[meep]

Originally Posted By: wolf_06
134000 km, new spark plug, new O2 sensors.

I would blame the map sensor or tps sensor, its only intermitent on a load, sometimes its fine, sometimes it jerks for a fraction of second when downshiftting, like the engine is chocking kind of.


under load suggests arcing in the plug circuit. cracked coil pack or aged spark wires.

 

[EricF]

a belt will slip due to lack of proper tension, caused by a weak belt tensioner or a fixed belt tensioner and a belt that's stretched just a sneeze.

I would examine your belt tensioner and belt.

Definetely no belt dressing sprays. all those do is make the rubber swell, and on a serpentine belt, you pretty much ruined the belt afterwards. Proper tension is the key.

 

[Kestas]

Clogged fuel filter? This would cause the high-end performance problems you're experiencing.

Another cause for the same symptom is a restricted exhaust, usually because of a broken catalytic converter.

 

[Trav]

Originally Posted By: wolf_06
Yes I had put STP full system cleaner, I have no MAF, only a MAP, CEL code p2096, lean fuel trim bank 1

You are chasing a lean condition. Long way from a slipping belt.

It could be a lot of things you really need a scan tool to diagnose this without tossing parts at it.
look for the obvious, vacuum hose off or broken/cracked. You may have disturbed one changing the plugs.

The STP is lousy AFAIK it is mostly Kerosene use a PAO based cleaner.
Something to check out..

http://nissanhelp.com/diy/obd_codes/p2096_hyundai.html

 

[mechanicx]

Originally Posted By: Kestas
Clogged fuel filter? This would cause the high-end performance problems you're experiencing.

Another cause for the same symptom is a restricted exhaust, usually because of a broken catalytic converter.


Could be a possibility with the code he has. Maybe even contaminated gas.