3.0L Engine Vacuum Question - Ranger-Forums - The Ultimate Ford Ranger Resource


2.9L & 3.0L V6 Tech General discussion of 2.9L and 3.0L V6 Ford Ranger engines.

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 01-13-2014
Member
Thread Starter
 
Join Date: Jan 2014
Location: Oak Ridge
Posts: 3
3.0L Engine Vacuum Question

I started my 99 Ranger tonight and saw that there was no oil pressure reading on the gauge. I shut it off and on several times with no reading. I then checked the oil and it was fine. in doing so I opened the oil filler cap. Then i started it back up and got a reading. the gauge measured half way. Not sure why i did this but as it was running I open the oil filler cap and the engine shut off due to the big vacuum leak.

Is that vacuum normal for the 3.0l, i have asked a few people and was told it may be depending on how ford did the vacuum for that engine.


Oh I am planning on replacing the PVC Valve and Oil sending unit.


Thanks


Ray
Reply With Quote
  #2  
Old 01-13-2014
pearlkid9988's Avatar
Member
 
Join Date: Dec 2008
Location: Newnan Georgia
Posts: 828
Honestly not sure I've never tried it. Ill run out and pull my cap and see what happens and report back!
Reply With Quote
  #3  
Old 01-13-2014
RF Veteran
iTrader: (1)
 
Join Date: Jan 2014
Location: Vancouver, BC
Posts: 7,573
Yes, it can be normal.
Engine idling has the highest vacuum it will have, so PCV valve is open and sucking air from valve covers and crank case.
When you opened the oil cap the extra air caused a lean mix and engine died.

Ford has used an oil pressure switch since the early '80s, so oil pressure gauge is really an Idiot Light without a bulb, lol.
If oil pressure is above 5psi then gauge will show "normal" if below 5psi then gauge will show 0.
Now before you panic, if oil pressure was really below 5psi you would hear the valve train loud and clear, that would be the time to shut off the engine.

0 oil pressure on the Ford gauge with no engine noise means check wire on sender or replace sender.
Reply With Quote
  #4  
Old 01-21-2014
Member
Thread Starter
 
Join Date: Jan 2014
Location: Oak Ridge
Posts: 3
Thank You for your replies


Ray
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
How To: Pulse Vacuum Hub Fix rngprerunner Engine & Drivetrain 7 12-13-2016 05:20 PM
Vacuum line question-98 ranger viper21700 2.9L & 3.0L V6 Tech 3 01-26-2011 12:39 PM
Sun Pro Vacuum Gauge Question gkayea 4.0L OHV & SOHC V6 Tech 4 02-01-2010 08:56 PM
what is the name of the black vacuum ball? wdstone General Technical & Electrical 3 07-12-2005 09:02 PM
vacuum gauge mounting options SVT01RANGER New Ideas 0 04-13-2005 11:10 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -6. The time now is 06:49 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.