Originally Posted By: JHZR2
Originally Posted By: TechnoLoGs
12.95V and climbing when I had the multimeter on it before hooking it up. I also reconnected my Power Pulse desulfator; with it on, battery voltage ultimately goes to about 12.4V.
As to dried-out cell.. Unsure. I will watch its behavior! And the CTEK DOES desulfate...
huh? 12.95 an climbing when turned off? Nope, not right. The battery may have a surface charge but the chemistry isnt going to allow 12.95V at rest.
Pulse desulfator voltage of 12.4V is too low too. The best way to prevent sulfation is to stay at full charge (12.72V or so), or under float (13.4V or so), anything less than full charge will sulfate.
So your engine is from a 94? That's the newer body style, no? Lots of things changed. Yes, Id definitely make sure that all external parts are the same as OE.
I did a lot of research (or as much as I could, including on here) and I came to the following sets of information:
1. The 1992 and 1993 engines on S-10 Blazer/S-15 GMC were the same 4.3.
2. Then, in another "set" and overlap, the 1994 S-10/1995 S-15 were the same. (Astro, etc, other S10 vehicles or even non-S10 vehicles with a 4.3. Junkyard Interchange sheets helped confirm this.)
3. The 1994 was all that was available, aside from a good low-mileage 1995 Astro unit. for same price.
4. Mechanic is now "making changes in his life" and did no twant to put in 1995 engine. "Too much swapping," he said.
5. None of these engines were heard to run.
6. The engine cost $300.
7. The truck was thrown back together, and runs, pulls, drives strong.
8. The truck feels SO improved on 93 I think something has happened. And I have been cleaning out carbon (Yes, I did the water trick. Yes, I have put fuel cleaner in EVERY tank of gas. yes, I put MMO in the oil. Yes, the oil pan was cleaned with gasoline, then put back on, no further checks. Etc etc etc etc...) that I think this is plausible. I could be wrong.
9. The 1995 S-Blazer was the first year of the body style that looked like this.
The 1994 and below Blazer looked like this. (Cosmetic difference is a 1994 has a 3rd brake light where 1993 does not)
THE 1994 and 1995 ENGINES show up as THE SAME in Interchanges. This means that 1995 was a carry-over year mechanically, with OBD1 and mechanicals of a 1994. It still is a different engine than a 1993 somehow, unsure the specifics. it was made to work and the engine may have come out of a 2WD vehicle as we had to change pans. I saw the digital dash and assumed 4WD. I don't know. It was all they had and they said "parts were going fast" and "they used to use it until someone bought the axle." $300. It was put together so fast that any possibility of noise outside the motor is just as likely as noise inside of it.
10. Call this "piling on" if you will, but the knocking noise seems to be going away.
^^ I am going to have to video this with my S3 once I get new service on it. I ditched T-Mobile and the phone is paid for so I can take it somewhere else.
ANY chance the 93 octane WAS needed, and that all my times putting in low octane caused the "knock" ? (Who knows the history of htis engine. Could be sludged up so bad. The oil is darkening after 1000+ miles but maybe some cleaning is happening, and stuck something is freeing up, thanks to MMO help.. I put in 12 ounces..)
I heard it. it sounds stronger, less knocky (I did not hear it this AM,) and no dieseling want to when it shuts off (it does not want to run-on.)
We are going to take the car there (back to inspection today after I run it for about an hour plus, not turning it off or anything to see if that will help it.
