Question about 1998 Chevrolet Blazer
1998 Blazer, 4.3L, 2WD. O2 fuse in UBEC compartment keeps blowing. Wih a circuit light checker connected to positive of battery, I have continuity on one side of fuse terminal and none on the other side. I have recently replaced all three of the O2 sensors with Bosch ones.
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Posted on Jan 02, 2017
you should have three oxygen sensors on your car, one for each bank of three cylinders; should be towards the Y pipe on each exhaust manifold. Additionally you should have one on the exhaust pipe before the cadilitic converter.
Posted on Nov 20, 2008
YEAH MAN I KNOW WHAT YOU ME, THOSE DARN COMPUTER ARE WAY TO SMART.. THERES NOTHING WRONG, BUT YOU CAN TAKE THE TRUCK TO A GM DEALER AND THEY CAN FLASH THE COMPTUER, BUT THE ONLY DOWNFALL IS THAT THE CHECK ENGINE LIGHT WILL NEVER WORK AGAIN.. SO ITS YOUR CALL..GOOD LUCK KEITH..
Posted on Mar 12, 2009
Make sure there is no vacuum leaks.
Vacuum leak at intake manifold and vacuum hose.
Bad Idle Air Control Motor (IAC)
Low compression (170 psi + is OK)
Start cleaning and repair these trouble spots and see is there any improvement.
For more advance DIY'er then you may try this.
Use a can of Berryman carburetor clean to locate the vacuum leak.
SEE SAMPLE PICTURE HERE
This is a 20-30 minutes job.
Vacuum leaks can occur in following locations.
Intake manifold AND/OR vacuum lines.
Intake manifold is not accessible unless the engine head if off.
You can still check the potential leak by spraying some Berryman near the intake manifold.
Listen for rpm increase after you introduce the Berryman (FUEL) at idle.
Do the same starting from the brake booster unit (the round unit) on the drive side fire all.
Carefully listen for increase of RPM right after to spray the Berryman to the potential vacuum spot.
Get a friend to HEAR the RPM increase or monitor for RPM on the tech.
DO NOT AIM the Berryman into any heat source.
PLEASE RATE my answer if it is useful to you.
Posted on Dec 17, 2009
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