1994 GMC S-10 Blazer LS from North America - Comments

I think the September 22, 2009 comment was accurate. I just bought a 94 GMC Blazer Vortec and I may change my opinion though. Seems to run nice right now.

Been driving my 94 S-10 Blazer Vortec W engine since 1995. My secret to keeping in running good is to keep it tuned, run only branded premium gas, and if you suspect a problem with EGR valve, pour half a can of Seafoam fuel additive through the CV vacuum hose, shut off the engine, and let it sit overnight. Run it pretty hard next day. This works for me.

Question for posting 04/20/2010. What is a cv vacuum line?

What is a cv vacuum hose?

I have a 1995 S10 blazer ls with the 4.3 with cpi it has 324,000 miles on it has had two injectors of which on both the fuel pressure regulator was all that was wrong 50.00 part at auto zone and had two put a timing chain in at 307,000 miles but drove 30 miles home after it jumped time I love the truck my dad bought it new and we have run mobile one synthetic in it since new still has 180 psi on compression test on all six cylinders.

My 1994 Blazer 4.3 Vortec. Went to the shop because it was running rough. Mechanic told me very low oil pressure. What can I do??? It's got 192000 miles. Help.

I have a 1994 S-10 4.3 L that has poor acceleration. What will fix this problem?

Sounds like fuel pressure regulator is leaking. Or the fuel lines going into the CPI.

Actually, it's not as bad as some may think. It takes about 20 minutes to slap a new one on. Removing the left bolt is easy, but for the right, make sure you remove the connector, and then slide in an extension (about 8-10" will do) with a 10mm socket from the front in between various engine parts, and you have a direct way to remove the bolt. Just be careful when you are ready to take the bolt out... may have to reach in from the right behind the alternator to it. At first it seems awkward, but after doing it once or twice, it is not a big deal.

Again, be careful in removing and replacing the bolt, as you will need to guide it through in a tight area to get a straight shot at it. This way, there's no removing of parts, and you are then ready to roll.

If your thermostat has a weep hole in it, you need to put it in the up position for the vertical, and for the flat, you need to put it in towards the top radiator hose.