I use 87 octane in my 1989.

 

That sounds a little low. Have you scanned for whether the KS picks up knock? In my 91 Firebird with the L98 engine, it will knock with 87. Of course, I had iron heads so that might affect it some but I needed 93 to run with the least amount of knock from the KS.

 

When would it be knocking? Every once in a while?

I do get some knock counts on start up. But I believe that is normal.

And I get some on shut down. Which I believe too is normal.

I don't really notice much if any knock counts while driving around. I'll have to look at my scans again though.

 

It shouldn't knock while driving around too much. Mine knocked more when I hit the gas if I had 87 vs 93

 

I've ran at least 10 scans so far. Just about all of them, I don't get much knock counts. There were 2 scans that had alot of knock counts though.

Here are some of my knock count scans. The first one is what my typical knock counts are. The last two are two scans I noticed alot of knock counts:







I'll keep an eye on my knock counts on future scans. And may run a tank with 89 or 91 and do some scans.

 

I've always run premium, but w/ 10.8:1 compression I have to. But looking at your counts, I couldn't help but think about how the place I used to buy gas, at some point went to 10% ethanol. During this time, w/ a hotcam on factory tune I was getting a random misfire code alot (knock counts). Switched to 92 octane w/o ethanol and no more misfire code, at least very rarely and only at long idle periods.

Wonder if your recent increase in knock counts could be fuel quality/purity related?

 

Those aren't in order. I had 10 scans filed. And I pulled the two that had alot of knock counts. Then I pulled one of the other scans to show what my knock counts usually are. As just about all my scans don't have high knock counts, just two scans.

Yeah, kinda hard to tell as you could get a bad batch of gas. Or maybe one tank is 100% gas, the next is 10% ethanol.

There are some gas stations around that say their gas has no ethanol. But those stations are usually the run down no name stations. So, I'd wonder about if it would even matter to get gas there anyways.

 

You'll put money on it that your vehicles run better than mine? and you don't put anything in your vehicles your not familiar with the outcome? wow really? stuck up a little? All anyone who is buying or even wondering about sea-foam or any other substance is really only trying to take care of what they own. What is wrong with a little TLC ? I am not a scientist nor care what it is these products. I don't have to know. If we all have similar engines and others have tried these products I trust corvette brothers that much to tries these products in good hopes. I don't have the time to rip apart my injectors and scrub this stuff or take things apart. I change my oil and keep up with the normal stuff. Trying sea-foam is not harmful in my mind. Others have tried it and give good results or the results of nothing improved. Have any been bad? NO..so why hate on a product that no one in 6 pages had said " it broke my motor, nothing is running right ect.." If you don't like it then fine say it. Don't be a jerk and prove your scientific point when your a janitor.

 

Trying is admirable. Doing, is better. Nothing wrong with a little TLC as long as it is not a wasteful effort. Just like the ancients making noise to scare off the dragon that is eating the sun (eclipse). Works every time too. Many ancients would swear by it. You still have the sun, do you not? It hasn't changed anything for the worse. I think it is called wasted effort.

While our Vette Brethren have good intentions, it might not account for the placebo effect. Let me share a personal story with you. My wife bought new glasses. The were much larger than the old ones. It gave her headaches because of the much larger weight pressing down on her. Look at them. One is twice the size of the other. It has to be heavier. Went to a post office. Old smaller pair weighed less than the new larger pair. Headache was cured.

I think that is the crux of the issue. Like I said, the stuff is snake oil and great for making people feel like they are doing something when they don't want to put forth the money and time to really do something.

 

If you say so. I have the data (and experience) to back up my claim, however. What have you got? That you pour unknowns into your motor, and therfore it "should" oulast mine?


Absolutely nothing at all! I don't think that you'll find a person here who disagrees w/that.


That's good stuff. But "you" (poeple on this forum) will argue to no end about what is the best oil, trans fluid, wax, leather conditioner, vinyl protectant...etc, etc. (?) Then you pour "magic potion" in to your motor??



Super! Then there is absolutely NO reason to be pouring Naptha and IPA into your motor oil to "clean" anything; it's already clean in there!


That's because you are ...therefore you don't know WHAT it's doing in or to your motor, do you?? So why pay $10 and pour it in? Identify your GOALS, find out the best way to achieve them, then use the proper product. Why does this logical process illicit such hatered? Is it admitting that there is no reason to what you have DONE? No big deal; everyones made sensless choices.
To wit: I once, a long time ago, used RESTORE, and Slick50 in a motor. It was a waste of money. A stupid choice. It didn't help me reach my goals. At the time, I wouldn't have admitted that, but I can admit it now; it was a waste of money and did nothing GOOD for my engine. It didn't HURT my engine in any meanignful way (sold THAT car at 230k, still running perfect), BUT....it was still a completel waste of money, time and it accomplished nothing.



I have said it. Clearly. Why? Because people are using it for the wrong reasons, in search of the wrong results, when something else will do the DESIRED result better and/or cheaper. That's what these forums are for, RIGHT?? Poeple don't come here to ask, "What is the most ignorant, expensive way that I can __________?" -Do they?



WOW! A JANITOR! Huh. And I'M the jerk here??? Now who's "hating"? Hmmm? I'm only trying to educate and HELP the OP (and anyone else who cares to enlighten themselves) choose the right item for their desired GOALS! How on this planet, does that make me a Jerk??

Lastly, WTF did the "janitor" thing come from? I even said in an earlier post what 1/3 of my responsibilities are. That is some serious grasping for straws, buddy. Good word. If you REALLY want, I have a packet of pixie dust I'll sell you for your dingle arm. Only $25 a packet. Great for cleaning out your HVAC system, muffler bearings, and encapulators. Now I'm being a bit of a jerk, but maybe, just maybe you'll see the point.

A janitor. Wow.

 

IBTL

 

...and thread lock in...3...2...1...

 

Has anyone used the Mopar Combustion Chamber Cleaner. Some guys use it instead of Seafoam for a top end cleaner.

You spray it into the throttle body and it comes out like a foam.

 

I don´t know but I´m thinking about pouring some coca cola through the intake, it might not do any cleaning but it dissolves rust anyway...............

Maybe let it sniff some coke, god knows what it might be good/bad for.......

Just kidding, the thread needed it...

 

IBT...

Tom don't worry.. i'm sure you are a really good janitor. LOL jk.

The janitor remark was pretty low

 

The car had run rich. And I've noticed getting some knock counts while hitting the gas. I was scanning the other day after I got it warmed up. And noticed getting knock counts almost everytime hitting the gas. I put in some 93, and still got alot of knock counts on part throttle. Later on when I scanned, I didn't get a lot.

So, I figured I would put some Seafoam or Mopar in the front as I could be getting carbon knock as it ran rich for a while enough to carbon foul things out.

 

It wont hurt it but it wont get all the carbon off either.
Go get the car warm and run it through the gears hard a couple times and blow it out. Youll almost always get some oily gunk in the intake wouldnt worry about it. Pulling the TB off and cleaning it wont hurt but wont make it knock either. Its not the front side you have to bother cleaning so much its the back.

 

TB already has been cleaned. I have an automatic. I had been running scans. And noticed sometimes getting spark knocks that happen when you hit the gas at part throttle. So, it shouldn't do that. Easiest thing to try is Seafoam or Mopar to see if that does anything. As it had been running rich to foul things out. So, the knocks could be from what I guess they call carbon knock.

 

What is the base timing set at?

 

6* advanced.