Ford Ranger Forum - Forums for Ford Ranger enthusiasts!

Go Back   Ford Ranger Forum - Forums for Ford Ranger enthusiasts! > >
Forgot Password? Join Us!

Welcome to Ford Ranger Forum

Reply
 
Thread Tools Search this Thread

  #1  
Old 10-09-2009, 05:44 AM
Kevinr6969 Kevinr6969 is offline
Learning to use the forums
 
Join Date: Oct 2009
Posts: 3
Default A/C Compressor causing engine bog down

Ok so I have looked all through this site and I am not seeing the same problem that I am having. I have taken it to a repair shop and they seemed a bit stumped too. They can't determine whether it is an electrical prob or A/C compressor. Hopefully someone can shed some light on this for me.

Here is what is going on. The Truck is a 2002 2wheel drive 4.0. It has started to get cold and i am starting to use my defroster. Well when the defroster is on the Compressor will kick on and off. Now When this happens the engine will idle down and the lights dim but then it kicks right back to normal. I know when the compressor kicks on initially it will draw some power but this seems a little to much. I used the A/C all summer and I never had an issue. I try to keep all the general matenance up to date and get anything fixed that needs to be. I have since unhooked the compressor so it won't turn on when i am driving because i really don't need it right now. I do want to figure this out so i will have A/C next summer.

thanks
Reply With Quote
  #2  
Old 10-09-2009, 09:45 AM
littleblue littleblue is offline
Semper Paratus
 
Join Date: May 2009
Posts: 274
Default

How old is your battery. How cold is it getting. Sounds like the cold is stressing your battery. Get it checked. May be time for a new battery.
__________________
'00 XLT 3.0 Exted cab
Mods: Roush hood & cai, ASP pwr pulley, hot wtr bypass, 180 therm, e-fan, Gibson exh., 4.10 l/s, FabTech lift, kyb's, bii sway bar. 31x10.50 Yokahama ATs, Panther rims, light bar, SS grille, 03 stang buckets, explorer console, hurst shifter


http://www.cardomain.com/ride/706028/1
Reply With Quote
  #3  
Old 10-09-2009, 09:55 AM
FireRanger FireRanger is offline
Blinded by the light
 
Join Date: Sep 2009
Posts: 7,674
Send a message via AIM to FireRanger
Default

It sounds more like compressor drag than a voltage draw problem. The lights dimming is a result of the alternator spinning slower due to the RPM lowering.

Your truck at idle should be able to support the drag of the compressor with no loss in RPM. A very quick (1 second) dip when the compressor clutch engages is normal. If the RPM doesn't come back up, something is wrong. I believe the PCM should command a slight increase in throttle at idle to compensate for the added load of the compressor. I would start with making sure everything that regulates your engine at idle is in good condition.

- Air filter
- Clean the throttle body
- Clean the IAC valve (idle air control)
- Clean the MAF (mass air flow sensor)
- Disconnect the battery while you work and follow the idle re-learn process, which I'll try to find somewhere.

Then see if the problem goes away.
__________________
(Formerly)
FireRanger
2003 Edge 4.0 4wd

How to: Aux light wiring, relays, & fuses
Info: 300+ intake threads here on FRF
Info: HID Projectors
How To: NO HEAT Troubleshooting Guide
Reply With Quote
  #4  
Old 10-12-2009, 06:28 PM
Boujiboy2000 Boujiboy2000 is offline
Learning to use the forums
 
Join Date: Oct 2009
Posts: 8
Default battery

look at the specs on the battery you buy and how many cold cranking amps it has. because a battery does not put out as many amps when it is real cold.
Reply With Quote
  #5  
Old 10-13-2009, 04:53 AM
Kevinr6969 Kevinr6969 is offline
Learning to use the forums
 
Join Date: Oct 2009
Posts: 3
Default

The truck is an 02 and I have never replaced the battery, so it's 7 years. The weather hasn't been extremely cold here either (upper 40's at night 60's durring day). The truck does not seem to bog down while the truck is in park. It mainly just does it when in drive at a stop light. I did have a hose replaced a couple weeks ago that is connected to the Pcv valve. The truck didn't start idling funny till after that was replaced. I also had the fuel fiter replaced as well.
Reply With Quote
  #6  
Old 10-13-2009, 08:14 AM
FireRanger FireRanger is offline
Blinded by the light
 
Join Date: Sep 2009
Posts: 7,674
Send a message via AIM to FireRanger
Default

Do all the above like I suggested. This is probably not related to the battery at all. Something is making it not idle properly.
__________________
(Formerly)
FireRanger
2003 Edge 4.0 4wd

How to: Aux light wiring, relays, & fuses
Info: 300+ intake threads here on FRF
Info: HID Projectors
How To: NO HEAT Troubleshooting Guide
Reply With Quote
  #7  
Old 10-13-2009, 11:36 AM
Kevinr6969 Kevinr6969 is offline
Learning to use the forums
 
Join Date: Oct 2009
Posts: 3
Default

I did go to have the battery checked and it was bad. I bought a new one, so we will see on that. I also reset the Idle as dirrected from the manual. I will be able to really check everything when I leave work here in about an hour.
Reply With Quote
  #8  
Old 07-05-2012, 04:40 PM
Bigeric Bigeric is offline
Learning to use the forums
 
Join Date: Jun 2012
Posts: 4
Default Re: A/C Compressor causing engine bog down

Well you know the battery is only needed to start the motor after it starts it is not used
__________________
1996Ford ranger 3.0 super cab 4wd
Reply With Quote
  #9  
Old 07-05-2012, 05:01 PM
FireRanger FireRanger is offline
Blinded by the light
 
Join Date: Sep 2009
Posts: 7,674
Send a message via AIM to FireRanger
Default Re: A/C Compressor causing engine bog down

Quote:
Originally Posted by Bigeric View Post
Well you know the battery is only needed to start the motor after it starts it is not used
Well you know this thread ended three years ago?
__________________
(Formerly)
FireRanger
2003 Edge 4.0 4wd

How to: Aux light wiring, relays, & fuses
Info: 300+ intake threads here on FRF
Info: HID Projectors
How To: NO HEAT Troubleshooting Guide
Reply With Quote
  #10  
Old 07-22-2012, 04:22 PM
will.abernathy will.abernathy is offline
Like the Forums
 
Join Date: Apr 2012
Posts: 32
Default Re: A/C Compressor causing engine bog down

Dude, you are kind of a dick.
__________________
1991 Ford Ranger 3.0L V-6 5-speed manual transmission, 175,00miles
Reply With Quote
  #11  
Old 07-22-2012, 04:27 PM
nicktheman2013 nicktheman2013 is offline
Shiftin Gears
 
Join Date: Feb 2012
Posts: 335
Default

Clean your iac. My 3.0 had the same problem like fire ranger said the iac isnt doing its job and causing the rpms to drop which drops the voltage output of the alternator
__________________
2001 Ford Ranger EDGE 3.0 V6 5 speed
OEM front tow hooks
Class 3 tow bar
Rugged Liner Bedliner
3.73 gears
Stock size tires 235/75/R-15 Michalen LTX M/s2
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Compressor Clutch ranger93 General Ford Ranger Discussion 1 07-03-2011 01:20 AM
What could be causing a continual dinging sound on my 03 Ranger truck? electric134 Interior Tech 4 02-25-2011 04:25 AM
Having chilled air without A/C compressor on STL General Ford Ranger Discussion 0 08-07-2009 06:54 PM
AC compressor not getting voltage ranger93 General Ford Ranger Discussion 0 06-26-2009 06:49 AM
Ac compressor 4evermodding 3.0 Vulcan Tech 5 06-09-2009 06:46 PM