Focaljet - Ford Focus Forums - View Single Post - PRODUCT FAQ: Zetec Underdrive 2pc Pulley Set

**Black331** · 04-26-2006, 01:53 AM

I've been thinking of doing an underdrive pulley but was wondering if there are any drawbacks (besides the headlight dimmingat idle which I don't care about)??? I have heard some people have had engine troubles caused by underdrive pulleys? Is this true?

04-26-2006, 01:53 AM	#4
Black331 TEAM Member Join Date: Apr 2005 Location: Long Beach, Ca Posts: 331	Re: PRODUCT FAQ: Zetec Underdrive 2pc Pulley Set I've been thinking of doing an underdrive pulley but was wondering if there are any drawbacks (besides the headlight dimmingat idle which I don't care about)??? I have heard some people have had engine troubles caused by underdrive pulleys? Is this true?