Question about 1990 GMC Sierra
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Posted on Jan 02, 2017
happens mostly in reverse at very low speed. change spark plugs to an ngk, increese gap by 0.01 and advance distributer about 1 or 2 digrees to increase idle from around 800 to 850 or 900.
Posted on Jul 24, 2009
shes easy , two bolts and two plug wires cant screw up , worst part is the room you have to work with , try get front of truck off the ground so you can manover
Posted on Oct 29, 2009
i hade the same problem...the catylatic conveter had melted inside which was causing the problem...u can get a universal one from any muffler shop....
Posted on Nov 16, 2009
p0449 is an evaporative emission code that indicates a problem with the canister vent solenoid.. without being able to scan and check all of the system I would recomend replacing the vent solenoid. I believe their was a GM TSB on that part and it has been modified.
please respond with fix details
Posted on Jul 10, 2010
If a qualified mechanic told you that you have a Bad A/C Hose and you are unsure of this Diagnosis.Then I recommend that you try to Locate weather or not you have a Bad A/C Line or Hose ,is to buy you some A/C Leak Detector,Install it in the Low Side of your A/C Line, Which you should See a Cap that has a letter(L) on it. You'll beable to Buy a Can with a Hose or By a Seperate A/C recharge Hose.
After you get this, before putting any in your A/C System.
Turn on your A/C and Put it on Maximum Cool with Maximum Fan, Let it Run to Operating Tepmerture. Then Go ahead and Put the Leak Detector in Your A/C Low-Side. .
Then Look very Close to ALL your A/C Lines, You'll be Looking for Blue ,Green or sometimes Red Dye. Leak Detector has a Color Dye in it. If you see it anywhere ,You'll Find Your Leak and it will also show you What needs to be Replaced
Also Look inside your Vehicle Under your Dash mainly on the Pasenger Side. With a Good Light.
If you don't find a Leak then you may just need to Recharged your A/C System.
Providing All else is working Properly:
I hope this gets you some Cold Air Sir. I would like to Thank you for Using FixYa ,Please let me Know the Quality of my Solution by Voting for me.
Thank You again Sir: From: d_hubbs
Posted on Aug 17, 2010
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