engine knock with cooler weather????
#1
10-25-1999, 12:56 AM
Join Date: Jun 1999
Location: Dallas
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engine knock with cooler weather????
Is anyone experiencing engine knock, possibly due to cooler weather, with the chip? I had to send my chip in to be reprogrammed because it originally caused knocking in the 3200-3500 rpm range. Got it back and things worked okay, but our weather started cooling down into the 50's at night. Now I notice substantial knocking in the mornings and evenings. Just curious.
#2
10-25-1999, 01:03 PM
Former Sponsor
Dear Belvadere,
Usually the effect of cooler weather is to *reduce* any tendency to detonate, not to increase it. So it's usually just the opposite. However, what may have happened is that your area could have just made it's changeover to reformulated gasoline for the winter, as that happens in a lot of areas anywhere between October 1st and November 1st. As reformulated gasolines have lower BTU content, there is less energy in each gallon of gas, so you can get about 8%-10% worse gas mileage using reformulated fuels. It may be that this, combined with cooler denser air, is creating a condition in your combustion chamber where with the increased oxygen content from the cooler denser air, combined with a lower energy content gasoline, is creating this behavior.
I would check to see if your gas station has switched fuels lately, or if this is just one bad tank of gasoline. If it's something that is going to stay, like reformulated gasoline, then you may need to have your Superchip adjusted again to compensate for this. Feel free to give me a call to discuss this, or just talk directly to Superchips if you like at 888-227-2447. I got your email and responded to it too.
Please keep in touch, and let me know if this is reformulated gas, or if you need any assistance with this, ok?
All the best,
------------------
Mike Troyer
Performance Products, Inc.
National Distributor of Superchips
(540) 862-9515
Email: mtroyer@compuserve.com
[This message has been edited by Superchips_Distributor (edited 10-26-1999).]
Usually the effect of cooler weather is to *reduce* any tendency to detonate, not to increase it. So it's usually just the opposite. However, what may have happened is that your area could have just made it's changeover to reformulated gasoline for the winter, as that happens in a lot of areas anywhere between October 1st and November 1st. As reformulated gasolines have lower BTU content, there is less energy in each gallon of gas, so you can get about 8%-10% worse gas mileage using reformulated fuels. It may be that this, combined with cooler denser air, is creating a condition in your combustion chamber where with the increased oxygen content from the cooler denser air, combined with a lower energy content gasoline, is creating this behavior.
I would check to see if your gas station has switched fuels lately, or if this is just one bad tank of gasoline. If it's something that is going to stay, like reformulated gasoline, then you may need to have your Superchip adjusted again to compensate for this. Feel free to give me a call to discuss this, or just talk directly to Superchips if you like at 888-227-2447. I got your email and responded to it too.
Please keep in touch, and let me know if this is reformulated gas, or if you need any assistance with this, ok?
All the best,
------------------
Mike Troyer
Performance Products, Inc.
National Distributor of Superchips
(540) 862-9515
Email: mtroyer@compuserve.com
[This message has been edited by Superchips_Distributor (edited 10-26-1999).]
#3
10-25-1999, 01:35 PM
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Join Date: May 1999
Location: Dallas, TX
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I'm going to have to get a reprogram as well.
#4
10-27-1999, 12:12 AM
Former Sponsor
Dear MDaily,
We have a few other customers in that area that have had that problem. It's funny, it only seems to affect about 5%-10% of our customers there in the DFW area, and the rest, 90%-95%, have no problems. But you aren't the only one, just so you know. What I would suggest is that you identify when you hear the pinging, is it only on WOT (wide-open throttle), or do you get it on part-throttle too, what rpm range does it happen at, etc., that sort of thing, and Superchips can easily make that adjustment for you.
Good luck,
------------------
Mike Troyer
Performance Products, Inc.
National Distributor of Superchips
(540) 862-9515
Email: mtroyer@compuserve.com
We have a few other customers in that area that have had that problem. It's funny, it only seems to affect about 5%-10% of our customers there in the DFW area, and the rest, 90%-95%, have no problems. But you aren't the only one, just so you know. What I would suggest is that you identify when you hear the pinging, is it only on WOT (wide-open throttle), or do you get it on part-throttle too, what rpm range does it happen at, etc., that sort of thing, and Superchips can easily make that adjustment for you.
Good luck,
------------------
Mike Troyer
Performance Products, Inc.
National Distributor of Superchips
(540) 862-9515
Email: mtroyer@compuserve.com