Engine & Internal Chat about beefing up your Blazer's engine insides here.

1998 blazer 2wd LS rough idle

Old 08-18-2011, 05:44 PM
Starting Member
Thread Starter
Join Date: Aug 2011
Posts: 1
fred65301 is on a distinguished road
Default 1998 blazer 2wd LS rough idle


The problem I am having is a slight rough idle through out the whole engine cycle. I am getting bad fuel mileage in addition.Please help me, I am unclear what to do next.

I have 1998 chevy blazer LS, 4.3 2 wd . Here is what I have fixed or replaced:

Replaced O2 sensors
Spark Plugs and Wires
Spider injectors
cap and rotor
new air filter
fuel filter
just about all you can replace externally on the motor

no engine codes or other light indicators have surfaced

Symptoms I have discovered:
oil in radiator but not on dipstick
broken engine mounts
Engine still runs strong with little or no hesitation
Engine is not overheating or no deposits of water or oil coming out the tailpipe.
I am the second owner of this truck.The truck has approx. 169k miles on it and has been well maintained for the most part.

Please help with your suggestions.
Related Topics
Thread Starter
Last Post
blazer chris
2nd Gen S-series (1995-2005) Tech
12-08-2011 09:56 AM
Engine & Transmission
06-16-2011 12:59 AM
Engine & Transmission
12-30-2010 01:41 PM
Engine & Transmission
04-21-2010 10:50 PM
Engine & Transmission
08-12-2008 05:34 PM

Thread Tools
Search this Thread
Quick Reply: 1998 blazer 2wd LS 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.