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Am I hearing Detonation?
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11-22-2007, 01:13 PM | #1 |
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Am I hearing Detonation?
I fear I may be experiencing a bit of detonation during full throttle 6k rpm or higher 1-2 shifts. When I go for a gear change I hear one “ping” as when a car is pinging from detonation. I’m testing a tuning device and am wondering if you think what I’m hearing is detonation or something else? For the purpose of the question I won’t mention the manufacturer of the tuning device since I’m hoping for totally unbiased opinions as to what this may be. If you think it’s detonation I want to take it out asap.
I've experienced the same thing on both Chevron 91 and Shell 91 so I don't think it's a case of bad gas. |
11-22-2007, 01:27 PM | #3 | |
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11-22-2007, 02:12 PM | #5 |
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Try throwing in some good octane booster,or if you can get 93 octane gas or even a gallon of 100 octane unleaded race fuel.Then if your ping, if thats what your hearing goes away you know you will need to use a higher octane gas if its available in your area.
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11-22-2007, 02:44 PM | #7 |
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11-22-2007, 02:46 PM | #8 | |
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It does not read extended codes, but another company claims they will have extended software out early next year. |
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11-22-2007, 03:13 PM | #10 |
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Ok thanks guys. I will stop by the 76 in Newport Beach and get a few gallons of $7.99 100 octane to see if this goes away.
As Jeff suggested, I am trying the Turbo Tuner and my ECU has had a couple thousand miles with many WOTs to adjust. My concern is that the stock ECU isn't going rich enough at higher rpm and boost. Jeff, if the 100 doesn't help I will swing by at your earliest convenience. Now to get a scanning tool. |
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11-22-2007, 03:21 PM | #11 |
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Last edited by Calgary Agent; 11-22-2007 at 05:56 PM.. |
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11-22-2007, 03:33 PM | #13 |
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without hearing it, its hard to say. but i have never heard of the turbo tuner causing PING.. take off the turbo tuner and see if its still there. 20 sec uninstall
drop by Jeff's shop see what up if anything. |
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11-22-2007, 04:33 PM | #15 |
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11-22-2007, 05:02 PM | #16 |
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So should I pull the TT and unplug the battery first or do you think I should try adding some 100 octane to see if it goes away? Realistically I won't mix 100 in every tank so maybe unplugging the neg terminal and resetting the ECU should be the first step...?
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11-22-2007, 07:30 PM | #18 |
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The other thought is to drive my car back to back with yours, and vice versa (since we have the same tune). It may be a normal sound you are hearing. Or it could be something else. I am around all week-end so let me know if you want to drive my car.
One of the nice things about the TT is that it is really easy to take out and experiment!
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11-22-2007, 08:29 PM | #20 | |
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11-22-2007, 08:37 PM | #21 |
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I just unplugged the neg terminal on the battery and left the TT on. After an hour I will hook the battery back up and see what happens tomorrow. I've had the TT on and off several times and never heard this pinging sound without the TT installed. I'm certain of this as I beat the piss out of the car without it on since it feels so much slower.
Will report back tomorrow after the ECU reset. I hope this is all that's needed. |
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11-22-2007, 08:39 PM | #22 | |
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