General Tech Good at troubleshooting? Have a non specific issue? Discuss general tech topics here.

2002 4 Cyl Rough Idle

  #1  
Old 02-24-2018, 09:26 AM
Junior Member
Thread Starter
Join Date: Jan 2016
Posts: 20
Default 2002 4 Cyl Rough Idle

Trying to diagnose a rough idle on 2002 Camy

No CEL, does not stall, and runs well except for noticeable rough idle. Idle RPM~ 600.

Have done following:Cleaned MAF and throttle body, checked PCV, replaced engine temp sensor, checked spark plugs. To the extent I can have checked for vacuum leaks but not certain I understand a good method for this.

The idle has gotten rougher since I first noticed it 3-4 weeks back. My next step is to look at fuel pump/filter or injector - but looking for advice before I proceed.

Thanks for any comments.

JW
 
  #2  
Old 02-24-2018, 03:58 PM
Super Moderator
Join Date: Jan 2008
Location: PTW
Posts: 11,738
Default

Was the battery discounted?

Are you needing to add coolant to the reservoir tank?

Vacuum leaks are just that. Typically holes, tears in vacuum hoses or intake air hose after the MAF sensor.

Try cleaning the MAF sensor. Use a throttle body cleaner. Check Utube videos on cleaning Toyota MAF sensor.
 
  #3  
Old 02-24-2018, 07:16 PM
Junior Member
Thread Starter
Join Date: Jan 2016
Posts: 20
Default

Thanks for the reply! Cleaned the MAF - twice before posting with no change. Battery is lass than a year old - I load tested after your reply and it checks good. Also no issue with coolant level. thanks for the help.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
hillbilly_lv
New Member Area
9
03-13-2012 06:10 PM
jackkpts
General Tech
4
07-18-2009 07:23 AM
jabster97
Engine & Internal
4
06-13-2007 11:20 PM
green97le
General Tech
2
06-08-2006 12:32 AM


Thread Tools
Search this Thread
Quick Reply: 2002 4 Cyl 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 Amazon.com and affiliated sites.