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IAC Valve question

 
  #46  
Old 02-25-2016, 10:54 AM
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Guarantee 1 thing if my truck was before fuel injection it would be running better by now lol
 
  #47  
Old 02-25-2016, 11:03 AM
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Also what should i do if the throttle plates are not closed all the way? How should i go about fixing that? Go to a junkyard and measure the distance between the bracket that is for the thottle plates and the throttle body? Or something else? Thanks
 
  #48  
Old 02-25-2016, 01:01 PM
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Originally Posted by scrobbie View Post
Also what should i do if the throttle plates are not closed all the way? How should i go about fixing that? Go to a junkyard and measure the distance between the bracket that is for the thottle plates and the throttle body? Or something else? Thanks

Post #12: https://www.ford-trucks.com/forums/1...l#post16072099

You are over thinking this. The blades should be almost closed, a light from behind will just peek through when properly adjusted.
 
  #49  
Old 02-25-2016, 02:46 PM
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Thanks i must have not seen that above when you posted it sorry! Will check this stuff this weekend its supposed to be warmer then and ill rerun those vacuum hoses also i could squirt a shot of carb cleaner around the top of the TB shaft to see if its sucking air through there! Ive done that b4 on my harley it had a wore out throttle shaft at 1 time.
 
  #50  
Old 02-25-2016, 03:08 PM
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Originally Posted by scrobbie View Post
Thanks i must have not seen that above when you posted it sorry! Will check this stuff this weekend its supposed to be warmer then and ill rerun those vacuum hoses also i could squirt a shot of carb cleaner around the top of the TB shaft to see if its sucking air through there! Ive done that b4 on my harley it had a wore out throttle shaft at 1 time.
Yes that is another way to check for wear.
 
  #51  
Old 02-25-2016, 03:19 PM
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Thanks rla i do know some things even if it may not seem like it, at all!! Some things i just figure out even if i don't actually realise it lol but i do appreciate you taking time out of your busy day to help out along with other folks here! I just wish i was doing more helping than asking for help! But thanks again brother, along with others here too!!!
 
  #52  
Old 02-25-2016, 03:36 PM
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Also have u ever heard of finding vacuum leaks with propane before just asking?
 
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Old 02-25-2016, 04:59 PM
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Do you think i could check the VRES by using a air blow gun witha rubber tip and the air regulated down to check for leaks with it off the truck? Or is that a bad idea?
 
  #54  
Old 02-25-2016, 06:25 PM
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Originally Posted by scrobbie View Post
Also have u ever heard of finding vacuum leaks with propane before just asking?

Yes I have, and carb cleaner. I do not trust any of those methods to tell you the truth. I prefer the hand held vacuum pump/gauge method. Propane scares the he** out of me. Carb. cleaner is a lot less volatile to work with.
 
  #55  
Old 02-25-2016, 06:28 PM
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Originally Posted by scrobbie View Post
Do you think i could check the VRES by using a air blow gun witha rubber tip and the air regulated down to check for leaks with it off the truck? Or is that a bad idea?
The vacuum reservoir has a check valve in it. Trying to pressurize it from the manifold port is not supposed to work. You could do it from the "load" side I suppose. Just pull it off and look for signs of rust through. If you suspect anything at that point, pressurize it.
 
  #56  
Old 02-25-2016, 06:31 PM
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Originally Posted by scrobbie View Post
Another question the two small hoses that are on the side of the TB are those vacuum? Thanks guys!
Yes you should cap those if nothing is connected to them now, one should go to canister purge, but if left open they would be a vac leak.
 
  #57  
Old 02-25-2016, 06:49 PM
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Ok thanks for the advice!
 
  #58  
Old 02-25-2016, 06:54 PM
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Also i guess i should check the one behind the head light also yes!
 
  #59  
Old 02-25-2016, 06:59 PM
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Originally Posted by danr1 View Post
Yes you should cap those if nothing is connected to them now, one should go to canister purge, but if left open they would be a vac leak.
I was betting on the throttle body hot water pipes the OP was referring to.



As noted the canister purge valve has it's own port.

I am referring to the port with the hose attached in the upper left in the photo. The corresponding return port is on the lower portion of the throttlebody. Neither are open to atmosphere.
 
  #60  
Old 02-25-2016, 07:14 PM
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Originally Posted by rla2005 View Post
I was betting on the throttle body hot water pipes the OP was referring to.



As noted the canister purge valve has it's own port.

I am referring to the port with the hose attached in the upper left in the photo. The corresponding return port is on the lower portion of the throttlebody. Neither are open to atmosphere.
that one sensor on the left side my throttle body doesn't have i don't think? Just the IAC and TP sensor
 

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