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  #1  
Old 10-23-2015, 03:38 PM
lone-ranger lone-ranger is offline
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Join Date: May 2012
Posts: 200
Question Replaced cam synch on OHV. Now idles ROUGH

Hey all,

So my truck got the cam sync squeak about two weeks ago and I just had time to replace it today. I took the upper intake off so I could see the darn thing (thanks for that design Ford), got the old one out after setting to TDC (by putting the alignment tool on the old one before unbolting it), lubed up the new one, and put it in the block. I had to use a Dorman cam synchronizer and sensor because I simply couldn't afford a Motorcraft one (I'm a broke graduate student). Please don't say "it's because you used a Dorman!".

Truck ran perfect before the replacement, now it idles like absolute, total garbage. The whole truck shakes around 800 rpm, will jump up to 3000 rpm if I tap the gas and sounds fine and normal. If I just let the truck sit at idle, it revs it up to 3000 on it's own. At idle, it sounds like there is a turbo spooling up or it's sucking air somewhere (heard with windows down in the cab). But I checked again and have all connectors and hoses hooked up.

What did I screw up or miss?
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2000 Ford Ranger XLT 4x4 Supercab
4.0, 5-speed
Live axle 4x4 - 3.73 gear ratio - open diff
Stock (or OEM equivalent) everything except
Gibson Cat-Back Dual Extreme exhaust system
---HOME OF THE FREE, BECAUSE OF THE BRAVE---

Last edited by lone-ranger; 10-23-2015 at 03:40 PM. Reason: Forgot key info
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  #2  
Old 10-23-2015, 04:10 PM
stateranger stateranger is offline
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Default Re: Replaced cam synch on OHV. Now idles ROUGH

Probably a vacuum leak at the upper intake gasket.
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2014 F150 xl 3.7 6 speed auto.

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  #3  
Old 10-23-2015, 05:44 PM
lone-ranger lone-ranger is offline
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Default Re: Replaced cam synch on OHV. Now idles ROUGH

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Originally Posted by stateranger View Post
Probably a vacuum leak at the upper intake gasket.
Not far off. Took a look after I cooled down and ate some dinner. I missed the vacuum hose under the throttle bottle. Hooked that back up and runs like a champ! No more death chirp!

Thanks for the reply stateranger!
__________________
2000 Ford Ranger XLT 4x4 Supercab
4.0, 5-speed
Live axle 4x4 - 3.73 gear ratio - open diff
Stock (or OEM equivalent) everything except
Gibson Cat-Back Dual Extreme exhaust system
---HOME OF THE FREE, BECAUSE OF THE BRAVE---
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  #4  
Old 10-23-2015, 06:06 PM
stateranger stateranger is offline
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Join Date: Nov 2012
Posts: 2,898
Default Re: Replaced cam synch on OHV. Now idles ROUGH

Sweet easy fix.
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2014 F150 xl 3.7 6 speed auto.

Quote:
Originally Posted by pk9298 View Post
HELL TO THE NO!! Abort abort abort!! That's the first thing to go!!! Ewwwww! I'm not no vampire! I don't enjoy red tea
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4.0, cam sync, cam synchro, ohv, rough idle

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