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I have infamous pinging on my Vulcan. And it is action time for me. I will start replacing/cleaning EGR valve and change t-stat to 180 degree this weekend.

I am running on Autolite Copper plugs and didn't make anydifference.
I have been putting 89 octane, not much difference. BUT, brute North East winter calmed the pinging. However, temperature raised little lately, it appears to be back slightly.

When I was searching possible solutions I found this for Explorer, it is very similar to Water Injection device that Kermit bought. (I need to PM him to ask the details)
Anyways

QUOTE
On the left rear corner of the intake manifold is a vacuum port cluster, one of the ports has a simple rubber plug covering it. Remove the plug and attach a 4 foot length of vacuum hose to it of the proper diameter. Fill a 16 ounce soda bottle with warm water. Find a friend to sit in the vehicle. Start the engine and have your friend raise the RPMs to approx. 1200. Now take the end of the vacuum hose and put it in the warm water in the bottle. Feed the engine a little at a time over a 5 minute period. Be careful not to give it to much water for to long so as to stall the engine, you can give it to much of a good thing. Take your time and try to maintain a small cloud of steam coming out of the tail pipe. When the engine starts to idle roughly pull the hose out of the water and let the engine smooth out a bit, add more water through the vacuum hose after it's running smoothly again. Continue this process until you've sucked all the water out of the bottle. Let the engine idle for 5 minutes after this process. While you're waiting you can unhook the hose you connected, replace the plug (don't forget to do this). Now go drive your Exploer and notice the difference. You may need to go through this process twice, I did for best results. In my case my Explorer was so bad before I did this that I needed to run Premium in it all the time and still had a problem with ping. With regular it would ping constantly. Now I can burn the cheapest regular around without ever the slightest hint of ping. The steam cleans the inside of all the combustion chambers and removes the carbon without pulling the heads.[/b]
At this point I am not sure where I am going to start injecting water in my Vulcan engine. Any idea....
 

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You might have better luck using a similar method with a top engine cleaner. I did this with GM top engine cleaner, but I think Seafoam is basially the same stuff. You use it in a similar way, hook it up to a vacuum port, slowly pour it in while running, then with about a third of the can left, you pour the rest in quickly, making the car stall. Then you let it cook for like 15 miutes, fire it up, take a drive and watch all that carbon blow out your tailpipe.

But if your experience is like mine, it still won't cure the pinging. It helped a little, but not completely.

Oh and I connected the tube to the port on the intake manifold that goes to the EGR solenoid.
 

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You are basically steam cleaning the engine. I have done this before myself. This can have good results.
It can also have catastrophic results if a large piece of build up breaks loose and goes into a valve or piston ring.


Good Luck
 

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Originally posted by FullDuplex@Feb 23 2004, 08:19 PM
So you still have pinging, have you tried 180 degree t-stat?
That was on my '93, which was sold last fall. But no I didn't try a 180 t-stat. I was thinking of trying colder plugs but never got around to it, 89 octane kept it fairly happy.
 
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