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  #16  
Old 02-25-2010, 11:35 PM
1freaky1 1freaky1 is offline
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Well, after pulling all 3 O2 sensors found that the front passenger side one had chaffed the insulation from rubbing on the firewall. So after taping up the 2 wires that were slightly bare and reinstalling it is running good at this time. Going to keep an eye on it and see if anything pops up in the codes. As for now there are no codes at all pending or active.
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  #17  
Old 02-26-2010, 04:47 AM
modelageek modelageek is offline
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Quote:
Originally Posted by 1freaky1 View Post
Well, after pulling all 3 O2 sensors found that the front passenger side one had chaffed the insulation from rubbing on the firewall. So after taping up the 2 wires that were slightly bare and reinstalling it is running good at this time. Going to keep an eye on it and see if anything pops up in the codes. As for now there are no codes at all pending or active.
that's great. I glad you got it figure out. next time scan it and tell us the exact codes. That is something we would have figured out in 2 minutes if we had the code.
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2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
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  #18  
Old 02-27-2010, 02:06 PM
1freaky1 1freaky1 is offline
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Well it lasted 2 days now and shortly after refueling this afternoon the light came back on a few blocks from home so I did get the codes this time and they are P171 & P174, I know the P171 is Bank 1 too Lean but the scanner does not show what P174 is. And my brother in law lost my computer code book so I am on my way to the parts store to look and see if they have one available. I am suspecting it is the front o2 sensor on the passenger side due to it having a steady voltage reading and that is the one the wires chaffed on.
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  #19  
Old 02-27-2010, 02:20 PM
modelageek modelageek is offline
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It is not the o2 sensors. I think the 4.0'S have and issue with intake manifold gaskets. Do a search for that
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2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)

2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
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  #20  
Old 03-02-2010, 04:26 PM
1freaky1 1freaky1 is offline
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Ok so the darn light came on again today and the same two codes came up. Well after taking the throttle body cover off and climbing almost into the engine bay I could see better and reach a few areas with the carb cleaner. And with a big thanks to a friend for the input on the 90 degree vacuum line connectors I found the problem, take a look at the pics. In one you can see there is a crack about 3/8" same in the second, the third shows where I cut the hose to look inside and that is what the oil does to the rubber over time. Wonder if any of those little junks go into the engine at some point?



So now it is running like it did when I first bought and it actually has power again.

Last edited by 1freaky1; 03-02-2010 at 04:28 PM.
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  #21  
Old 03-02-2010, 04:28 PM
01_ranger_4x4 01_ranger_4x4 is offline
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had the same exact thing happen to mine a few years back. that elbow seems to be a common cause of vacuum leaks on these trucks. glad you got it figured out!
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2001 Ranger 4x4 Stepside
-RCD Suspension lift
-33x12.5 BFG KM2's on Mickey Thomson classic locks
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  #22  
Old 03-02-2010, 04:35 PM
1freaky1 1freaky1 is offline
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Me too, Thanks. My friend that works at Ford told me they are very common cause and Ford does not sell just those elbows, you have to buy the whole line.
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  #23  
Old 03-02-2010, 04:41 PM
01_ranger_4x4 01_ranger_4x4 is offline
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Quote:
Originally Posted by 1freaky1 View Post
Me too, Thanks. My friend that works at Ford told me they are very common cause and Ford does not sell just those elbows, you have to buy the whole line.
yeah i found that out too. i ended up just using a section of rubber fuel flex line. it cost me about $2. i forgot how much ford wanted for the whole thing. yours looks like it was as bad as mine was. you could actually here mine sucking air, thats how i figured out what it was that was causing my CEL to come on.
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2001 Ranger 4x4 Stepside
-RCD Suspension lift
-33x12.5 BFG KM2's on Mickey Thomson classic locks
-4:56 gears
-Auburn gear LS
-James Duff traction bars
-Headers
-Flowmaster duals
-SCT X-Cal2 and some small exterior mods

http://www.cardomain.com/ride/2321189

2005 F-150 Lariat 4x4
-LED third brake light
-Weathertech floor liners
-Edge tuner
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  #24  
Old 03-02-2010, 06:15 PM
Vrod21 Vrod21 is offline
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I had a similar problem. I would get random CEL's, sometimes on short trips and sometimes on long trips. Finally went to Advanced auto and got the codes. I can't remember the numbers but it was "lean in bank 1 and 2". After a couple weeks of checking vacuum line and cleaning intake parts I fond my issue. A rubber elbow on my PVC line had a crack in it. The PCV in on the back of the engine, driver side. The vacuum line runs from there around the back of the passenger side and up to just under the throttle body.

I found there were three of the crappy rubber elbows on that line so i replaced it with a 3.5' rubber heater hose (sorry I don't remember the diameter). Has been perfect since.
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Last edited by Vrod21; 03-02-2010 at 06:18 PM.
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  #25  
Old 03-03-2010, 07:42 AM
RandSand RandSand is offline
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Great info guys! I have the same codes. Were these certain elbows or random ones. I plan to check mine.

Thanx!
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  #26  
Old 03-08-2010, 07:58 AM
1freaky1 1freaky1 is offline
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Default Re: CEL keeps coming on

Quote:
Originally Posted by RandSand View Post
Great info guys! I have the same codes. Were these certain elbows or random ones. I plan to check mine.

Thanx!
Mine was the 5/8" vacuum line coming off the lower passenger side of the Throttle body that goes around the back of the engine to the drivers side for the PCV. It has 3 of these rubber elbows connected to the plastic line.
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  #27  
Old 03-08-2010, 10:29 AM
RandSand RandSand is offline
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Default Re: CEL keeps coming on

Quote:
Originally Posted by 1freaky1 View Post
Mine was the 5/8" vacuum line coming off the lower passenger side of the Throttle body that goes around the back of the engine to the drivers side for the PCV. It has 3 of these rubber elbows connected to the plastic line.
Thanks for the info!!!
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