I just installed them and I get jerky throttle response intermittantly while driving. It also seems like I lost alot of power. Has anyone installed these before??
anyone experience similar results?

 

I had some on for a while with no problems. Look for something else?

 

yeah I'm taking them off tomorrow.

 

HI!... I've been running under drive pullies for 6 years. No problems here.

 

I'm thinking that it may be because I need to have my truck tuned?
I don't know. All I know is my truck sucks to drive with these pulleys on.
It idles all weird, jerks when I'm driving, lost alot of power(which is the worst part about it).
The reason why I bought them is because of how so many people say how great they are.
I guess not every vehicle will react the same? I dont know.
I'm gonna keep them I think until I get the XCAL2, maybe I'll put them back on after that.
Maybe that will fix it?

 

Some people rave about underdrive pulleys, others end up with a ton of problems. People have reported performance problems, overheating, low voltage, all sorts of things. Even when they work as they should the claimed performace boost is marginal at best. Not worth it IMO, there's better and easier ways to up performance.

 

HI!... Well I picked up 11RWH.P with my ASP two piece set of underdrive pulleys. No problems here. For the $100(CAN) I bought then for it was well worth it.

 

11? No way, not just from a set of pulleys that make it slightly easier to spin the fan and alt or whatever. People go out and spend hundreds on exhaust systems and intakes and rave that they picked up 3 or 4 hp.

 

thats why I picked um up because they work on alot of peoples trucks. The guy at troyer assured me that it was a good upgrade and what not. I know I installed them right. I had a mechanic watch me do it. sucks for me i guess.
minus 180 dollars. lol.

 

HI!... Well you can believe it or not, I don't care. That's what mine dynoed at, I also got 17RWH.P from electric fans and 9RWH.P from a electric water pump. Bolt ons DO work. I'm perfect proof of that, I have a built 5.4L that is N/A and only 8:0 compression and makes just shy of 360RWH.P and 400RWTQ. That is untuned and just found out recently might of been on 7 cylinders.

 

I had charging problems on my 5.4. My theory is the efans and the city driving just didn't spin the alternator enough. With a fully charged battery they seemed to help but I needed to put the truck on a trickle charger every night to keep from having problems. Pulled them off and put them on a farm truck I had that spent most of the time on the road and had no issues.

On the other hand I had them an 89 5.0 Mustang and they were awsome - different driving and higher performance setup.

 

my van is heavy~8500 lbs-it idles alot- and idles perfectly-no problems whatsoever-phil

 

Well I just reinstalled my OEM pulleys....and guess what? my engine is even worse than it was before. ANyone have any ideas on what caused this?

 

HI!... Perhaps when you were installing the pullies you mistakinly unpluged a harness or pulled a wire out from somewhere.

 

possibly, although i checked it over and over numorous times.