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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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  #1  
Old 06-02-2009
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Hesitation with A/C on

I noticed the other day that I have a bit of hesitation problem when my A/C is on. does anyone else have this issue? is it possibly the alternator or a pulley?

any info would be appreciated

('03, 4.0 V6, AT, 84,***miles)
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Old 06-02-2009
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are you talking about at idle? if so my idle drops a bit when the a/c compressor kicks on
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Old 06-02-2009
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Stab the gas harder, the computer will kill the ac if need be.
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Old 06-02-2009
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Originally Posted by 01_ranger_4x4 View Post
are you talking about at idle? if so my idle drops a bit when the a/c compressor kicks on
no Im talking about like 45mph+

I was driving on the highway cruising around 70mph with the a/c on and every once in awhile I would feel like a jerk. it wasnt that bad but it was definetely noticeable to me.

Im just trying to get my truck completely situated before i move
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Old 06-02-2009
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Only time I have ever really noticed the ac cycle is at idle. At cruise regardless of rpm never can tell its running.

I think you should check in to some maintence items.

Clean the maf
air filter
plugs
fuel injector cleaner

How is your IAC?

These are thing just off the top of my head.

You may want to reset the computer for grins.
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Old 06-02-2009
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Quote:
Originally Posted by TurdFX4 View Post
no Im talking about like 45mph+

I was driving on the highway cruising around 70mph with the a/c on and every once in awhile I would feel like a jerk. it wasnt that bad but it was definetely noticeable to me.

Im just trying to get my truck completely situated before i move
kinda sounds like what i was experiencing not to long ago. I always have my windows down, but now that I think about it, that day I had the A/C on. hmm...
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Old 06-02-2009
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ive got the 3.slow and i notice some power loss with the a/c on, some times i click it off to pass cars. lol
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Old 06-03-2009
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Quote:
Originally Posted by Blhde View Post
Only time I have ever really noticed the ac cycle is at idle. At cruise regardless of rpm never can tell its running.

I think you should check in to some maintence items.

Clean the maf
air filter
plugs
fuel injector cleaner

How is your IAC?

These are thing just off the top of my head.

You may want to reset the computer for grins.
the plugs and wires are new. I have a new cold air intake. and I could clean the maf and dump some injector cleaner in and see what happens
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Old 06-03-2009
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Ive never had a/c in my previous rangers. But my newest one does, and now that you mentioned it I remember turning it on one day driving about 50 mph. I had a noticeable decrease in engine power and it felt rather sluggish. I just attributed it to the a/c pump adding resistance to the belt and made me consider getting an under drive pulley. Now i see how much a ud pulley would help unload the engine.
I just figured it was normal but maybe someone on here could say for sure that it is.
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Old 06-03-2009
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Does it do it if the defrosters are on? Kinda like a power surge at highway speeds? My 07 does that. Not a major surge but like an "air bubble" per say. I just chalk it up to a sixer trying to pull 4.10's and the a/c..hehehe
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Old 06-03-2009
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Originally Posted by TazDevil07 View Post
Does it do it if the defrosters are on? Kinda like a power surge at highway speeds? My 07 does that. Not a major surge but like an "air bubble" per say. I just chalk it up to a sixer trying to pull 4.10's and the a/c..hehehe
yup I know exactly what youre talking about
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Old 06-03-2009
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im not sure if its normal to feel it at highway speeds. unless im at an idle i dont even notice when my compressor is running.
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Old 06-03-2009
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Mine doesn't affect any power while driving, I'm thinking you have a problem with your butt dyno
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Old 06-04-2009
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if you dont mind me asking, wtf is a butt dyno?
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Old 06-04-2009
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Originally Posted by TurdFX4 View Post
if you dont mind me asking, wtf is a butt dyno?
you're braver than me to ask that I wondered, just couldn't bring myself to ask.
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Old 06-04-2009
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Its another word for being able to feel a change sitting in the truck, hence butt dyno
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  #17  
Old 06-04-2009
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yeah, that was along the lines of what I was thinking still doesn't answer the question. maybe I should ask my gf that works at ford?
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Old 06-05-2009
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I'm having my gf ask a ford tech. Hang tight.
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  #19  
Old 06-05-2009
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alright
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Old 06-06-2009
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my truck does it on defrost to.its cause when your heater is on defrost the a/c pump kicks on and off but if your switch is on anything else the pump doesn't come on.
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  #21  
Old 06-06-2009
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Well my gf asked the tech. He can't give a definite answer why it does it. Said there isn't a TSB or recall on that issue either. Go figure....
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  #22  
Old 06-06-2009
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I have 3.0 and anytime the A/C pump kicks on,i lose power,i thought it was normal?
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  #23  
Old 06-07-2009
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alright, maybe it is normal, I dont really know
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Old 06-07-2009
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outta of the 2 rangers ive owned every one has done it the ac puts a load on the motor it like puting a big a load in the bed and then trying to race with it lol its not going to happen. i recon its a common ranger thing
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  #25  
Old 06-07-2009
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aight, thanks for the info everyone
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