84-85 Trucks & 4Runners 2nd gen pickups and 1st gen 4Runners with solid front axles

Help. Low oil pressure and rough idle

Old 05-15-2019, 06:17 PM
Registered User
Thread Starter
Join Date: May 2019
Posts: 1
Likes: 0
Received 0 Likes on 0 Posts
Help. Low oil pressure and rough idle

I added fuel additive in my gas and the injectors seemed to take a crap. I removed and tested each injector (bad) Went ahead and replaced all 4. Installed new ones and the truck still has a rough idle and low oil pressure at idle (20psi). Any ideas or tips are appreciated!
Rbabin92 is offline  
Old 05-16-2019, 05:29 AM
Registered User
iTrader: (1)
Join Date: Dec 2011
Location: sammamish, wa.
Posts: 2,026
Likes: 0
Received 26 Likes on 25 Posts
Tell us what you are working on first. I assume its not a 2002 2500 suburban with the 8.1 and 4L85E. But I could be wrong.

Most of us are scattered across the world so the more info you can give us the better we can help. Pictures of special areas or problems speak volumes as well.
thefishguy77 is online now  
Old 05-19-2019, 12:41 PM
Registered User
Join Date: Apr 2018
Location: Fair Oaks, CA
Posts: 61
Likes: 0
Received 2 Likes on 2 Posts
20psi at idle is too much if 22re. assuming it is a 85 Toyota. Should be under 5psi at idle. don't know how you tested 4 bad injector and it was still running. I would assume you also checked fuel pressure? Check intake tube. Check compression, which would typically be between 150-180psi, with not too much change from cylinder to cylinder. Maybe water in distributor?
SENOR NOODLES is offline  
Related Topics
Thread Starter
Last Post
Nikki Seidel
95.5-2004 Tacomas & 96-2002 4Runners
02-06-2019 11:33 AM
JP Purdom
86-95 Trucks & 4Runners
12-19-2015 03:56 PM
Pre 84 Trucks
03-08-2012 06:51 PM
86-95 Trucks & 4Runners
11-04-2009 01:36 PM
86-95 Trucks & 4Runners
08-12-2008 08:10 PM

Thread Tools
Search this Thread
Quick Reply: Help. Low oil pressure and rough idle

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