Make Sure To Replace Your Belt Tensioner..... Mine Was Causing Issue.

SRT Handz · Feb 21, 2010

For almost 2 years now my car has acted very weird in the Higher RPMs (above 4,500)..... When i would start getting past 4K, My lights go dim and I get a HUGE voltage drop. My battery Light would come on but then once I shift and the RPMs drop, the voltage comes back.

Nobody could solve my problem, but I had a Large feeling it was my 140,000 Mile belt tensioner causing the issue.

Well this friday I started my car and got a squeak from a pulley. Belt dressing made it WAY worse and it was screaming. The noise was coming from the bearings on the tensioner failing.

So I replaced the tensioner with a OEM Ford unit.... Now My Voltage drop at High RPM's is Fixed!!! My car also pulls harder in the High RPMs because my ignition isnt getting overwhelmed with low voltage.

Remember to Check your belt tensioner Over time to make sure it operation properly.... It could be causing you issues!!! :book1:

OnyxCobra · Feb 21, 2010

You had a large feeling it was the belt tensioner but waited 2 years to replace it? :wave:

lrall · Feb 21, 2010

Just an FYI, belt dressing is a big no-no for modern day belts...says mechanic (x3) that i used to run parts for

SRT Handz · Feb 21, 2010

OnyxCobra said:
You had a large feeling it was the belt tensioner but waited 2 years to replace it? :wave:

Yeah, It was on my list of Things to fix but there was more important things that came first. It wasnt really causing drivability issues and the problem was intermittent so i was just gonna wait till something broke then fix it.

mygreengt · Feb 21, 2010

right after i let it up from the floor i can hear the belt squeek from the high rpms. is that what it would do?

idk if that makes sense or not

JiMi_DRiX · Feb 21, 2010

Mine was squealing, and you could see where the belt had rubbed the engine block some. I replaced that and the idle pulley, all better!

and belt dressing is a big no no!! that stuff is gross and messy.