Go to Autozone and buy a repair manual for your make and model truck. It will be the best $20 bucks you ever spent.
Follow the maintenance plan as outlined in the manual.
plugs and fuel filter at 169 is good. Alt replacement, OK
other things:
PCV
clean MAF, TB, and EGR and IAC
change diff fluid, transfer case fluid
air filter
cap and rotor
plug wires
transmission fluid and filter
* rough idle is likely IAC needs cleaned or TB
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Originally Posted by paulson
What should I do to tune up my 96 Blazer 4.3L with 169K on the clock
I've changed out spark plugs, put in a new alternator, changed out the fuel filter...
What else can be done?
The vehicle runs fine and gets pretty good gas mileage, but it idles somewhat rough.
What should be cleaned? I hear egr and throttle body, but I have no idea where the egr is...
If you could tell me what should be cleaned or at least looked at and where it's located under the hood I'd greatly appreciate it!
Thanks
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