Hey all so the monte has had a weird stumble for awhile now. When sitting at a light or coasting the rpms will drop and the headlights and interior lights will dim, it then catches and the rpms rise and it does it again. It accelerates fine and is still getting good gas mileage. Do you think it might be the MAF? It has 130,000 on it with a wizaired cai.

Thanks in advance

 

Could be a lot of different things...

Unplug the MAF and see if it still cuts off

 

When is the last time plugs/wires have been changed? How many miles are on the current set...?

 

You should pop out the IAC and give it a little cleaning

 

If the lights dim it could be as simple as a bad battery connection. MAF may need cleaning, or the IAC like chibi said. Could even be a badly restricted fuel filter. And like mentioned spark plugs could be getting to their expiration point.

 

Any solution to the stumble yet?