Low speed detonation
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Freshman User
Joined: Oct 2003
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Low speed detonation
Hi there
I have issues with low speed detonation.
I took it to an auto parts store and they tried doing an OBD II scan on it. Nothing turned up.
I tried changing the spark plugs from NGK V plugs to Autolite double platinum and that made a difference but there is still some dieseling when it is at operational temperature.
I have tried the de-carboning treatments. That made no noticeable difference.
Could it be something in the throttle body or, could it be a problem with a ground wire?
Thanks
I have issues with low speed detonation.
I took it to an auto parts store and they tried doing an OBD II scan on it. Nothing turned up.
I tried changing the spark plugs from NGK V plugs to Autolite double platinum and that made a difference but there is still some dieseling when it is at operational temperature.
I have tried the de-carboning treatments. That made no noticeable difference.
Could it be something in the throttle body or, could it be a problem with a ground wire?
Thanks
New User
Joined: Dec 2003
Posts: 3
Likes: 0
I had the same problem on my Z28 and cleaning the Mass Airflow Sensor (MAF) did the trick. Its located on the intake elbow between the air filter box and the throttle body. It comes off pretty easy by loosening up a few screws and unpluging the wire, then just spray it down with some carburator cleaner, but don't wipe it with a rag, or jam anything in it to clean it, you don't want to dammage the little filliments in it or you'll be out $400. Let it dry for a couple minutes then put it beck in hte same way it came out...remember to plug in the wire. Hope this helps, it worked for me.
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Freshman User
Joined: Oct 2003
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Thanks for the suggestions
I can not adjust the timing since it is a distributerless system.
I have some carb cleaner so, I will try cleaning the sensor.
I can not adjust the timing since it is a distributerless system.
I have some carb cleaner so, I will try cleaning the sensor.
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Thread Starter
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Freshman User
Joined: Oct 2003
Posts: 48
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Hey
When I had a parts store do an OBD II reading on the vehicle it kept giving a message saying that it could not give a reading.
Any ideas on why this is?
Then I guess I could check the timing and perhaps set it.
What is necessary to adjust the timing on a distributerless engine?
When I had a parts store do an OBD II reading on the vehicle it kept giving a message saying that it could not give a reading.
Any ideas on why this is?
Then I guess I could check the timing and perhaps set it.
What is necessary to adjust the timing on a distributerless engine?
Tuned
Joined: Jun 2003
Posts: 295
Likes: 1
From: poughkeepsie ny
Well, I said did you check it. Far as I know you can still do that on a distributorless.
BTW, what makes you think you have a detonation problem?