Notices
86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

testing compression

Old 11-11-2005, 09:01 AM
  #1  
Registered User
Thread Starter
 
Jared Ajlouny's Avatar
 
Join Date: Aug 2004
Location: San Jose, CA
Posts: 575
Likes: 0
Received 0 Likes on 0 Posts
testing compression

my runner is leaking oil (not to the point where it gets on the ground, but it makes the engine look messy). all i want to do is test the compression cause if the compression is good im just going to replace the head gasket and oil pan gasket and call it a day..... i know on my jet ski to test it you take both plugs out (2 cylinder) and put the guage in one and hold the throttle open and start cranking away..... is that what i do for the runner?! i know 2 stroke engines like the back of my hand, but i have never delt with a 4 stroke........
Jared Ajlouny is offline  
Old 11-11-2005, 09:09 AM
  #2  
Registered User
 
surf4runner's Avatar
 
Join Date: Jul 2005
Location: so.cal
Posts: 4,476
Likes: 0
Received 0 Likes on 0 Posts
if doing all cylinders, i recommend removing all plugs first. otherwise no diff betweeen doing it on a 2 or 4 stroke.
surf4runner is offline  
Old 11-11-2005, 01:59 PM
  #3  
Contributing Member
 
MTL_4runner's Avatar
 
Join Date: Jul 2003
Location: Montreal, QC Canada
Posts: 8,807
Likes: 0
Received 0 Likes on 0 Posts
Pull the EFI fuse when doing it so the vehicle does not start.
MTL_4runner is offline  
Old 11-11-2005, 09:29 PM
  #4  
Registered User
Thread Starter
 
Jared Ajlouny's Avatar
 
Join Date: Aug 2004
Location: San Jose, CA
Posts: 575
Likes: 0
Received 0 Likes on 0 Posts
i dont think it will start without spark plugs....
Jared Ajlouny is offline  
Old 11-11-2005, 09:55 PM
  #5  
Contributing Member
 
marko3xl3's Avatar
 
Join Date: Jun 2005
Location: San Jose, CA
Posts: 1,725
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Jared Ajlouny
i dont think it will start without spark plugs....
You never know...better safe than sorry!
marko3xl3 is offline  
Old 11-12-2005, 06:29 AM
  #6  
Contributing Member
 
MTL_4runner's Avatar
 
Join Date: Jul 2003
Location: Montreal, QC Canada
Posts: 8,807
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Jared Ajlouny
i dont think it will start without spark plugs....
Just pulling the plugs will not stop the ignition from firing and you may fry the ignition (maybe not, but I wouldn't chance it).
MTL_4runner is offline  
Old 11-12-2005, 08:10 AM
  #7  
Contributing Member
 
YotaJunky's Avatar
 
Join Date: Feb 2005
Location: Vancouver BC
Posts: 783
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by MTL_4runner
Just pulling the plugs will not stop the ignition from firing and you may fry the ignition (maybe not, but I wouldn't chance it).
How about just pulling the wire from the ignition coil for those that use a coil, cap rotor etc..?

Troy
YotaJunky is offline  
Old 11-12-2005, 11:55 AM
  #8  
Contributing Member
 
DudeBud's Avatar
 
Join Date: Mar 2005
Location: WA ,monroe
Posts: 1,871
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by troy65
How about just pulling the wire from the ignition coil for those that use a coil, cap rotor etc..?

Troy
much easyer to pull the efi fuse so the injectors don't squirt fuel. thats just what i do
DudeBud is offline  
Old 11-13-2005, 05:41 AM
  #9  
Contributing Member
 
YotaJunky's Avatar
 
Join Date: Feb 2005
Location: Vancouver BC
Posts: 783
Likes: 0
Received 0 Likes on 0 Posts
Here's a good article. I think I'll test mine out now.

http://www.geocities.com/SiliconValley/2072/carcomp.htm

Troy
YotaJunky is offline  
Old 11-13-2005, 05:58 AM
  #10  
Banned
iTrader: (-1)
 
waskillywabbit's Avatar
 
Join Date: Jul 2003
Posts: 0
Received 13 Likes on 3 Posts
Probably might be a good idea to do a compression test and a leakdown...mine leaked oil, smoked like a fat indian chief and in general ran crapy...compression test was all fine...leakdown wasn't so great, but okay...but I just rebuilt the whole engine anyway...all new OEM parts and it runs like a new squirrel again.

waskillywabbit is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
eggens
86-95 Trucks & 4Runners
25
10-27-2015 03:14 PM
_Nicco_
86-95 Trucks & 4Runners
35
09-21-2015 03:06 PM
Yont283
84-85 Trucks & 4Runners
2
09-20-2015 10:56 PM
Yont283
General Vehicle Related Topics (Non Year Related)
3
09-12-2015 10:03 AM
Boomer8404
86-95 Trucks & 4Runners
3
09-10-2015 09:01 AM


Thread Tools
Search this Thread
Quick Reply: testing compression


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

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.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: