rough idle after deceleration
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Joined: Dec 2012
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From: New Caney Texas
rough idle after deceleration
Before I take it to a shop. I was hoping someone had some insight. I went through the replace special(plugs, Wires, Coil Packs, Fuel Pressure regulator, Checked the fuel pressure, cleaned throttle body and MAF and sprayed fluid around vacuum hoses for leaks.
On initial start up everything is fine at idle and good while pressing the accelerator pedal. The problem starts as rpm's drop it then feels like it is running on 7 cylinders. Once I let it idle for about 10 seconds it gets smooth and I can press accelerator again .
On initial start up everything is fine at idle and good while pressing the accelerator pedal. The problem starts as rpm's drop it then feels like it is running on 7 cylinders. Once I let it idle for about 10 seconds it gets smooth and I can press accelerator again .
Last edited by surfer02000; Apr 21, 2019 at 07:01 PM.
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Joined: Sep 2013
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From: Cape Coral, Florida
With the issues you are experiencing it’s difficult to diagnose your car just based on your symptoms !!...I’m sure the shop you are taking it to has all the right diagnostics equipment...could be many things !!
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,431
Likes: 3,981
From: Cape Coral, Florida
Before I take it to a shop. I was hoping someone had some insight. I went through the replace special(plugs, Wires, Coil Packs, Fuel Pressure regulator, Checked the fuel pressure, cleaned throttle body and MAF and sprayed fluid around vacuum hoses for leaks.
On initial start up everything is fine at idle and good while pressing the accelerator pedal. The problem starts as rpm's drop it then feels like it is running on 7 cylinders. Once I let it idle for about 10 seconds it gets smooth and I can press accelerator again .
On initial start up everything is fine at idle and good while pressing the accelerator pedal. The problem starts as rpm's drop it then feels like it is running on 7 cylinders. Once I let it idle for about 10 seconds it gets smooth and I can press accelerator again .
Thread Starter
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Joined: Dec 2012
Posts: 53
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From: New Caney Texas
appreciate the replies. Seems to happen whenever I press the gas pedal, smooth going up rough coming down(gradual decrease). And then it stays rough unless I let it sit for I'm guessing around 10 seconds.
Last edited by surfer02000; Apr 23, 2019 at 05:49 PM.
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Joined: Sep 2013
Posts: 15,431
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From: Cape Coral, Florida
Like I had mentioned we would only be guessing on a diagnosis...hope the shop you take it to aren't just "wrench turners"....if they don't use a scan tool AND a scope it may get expensive !!...good luck and let us know what they find !!
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Joined: Dec 2012
Posts: 53
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From: New Caney Texas
I'm going to let one of the corvette specialty shops around the Houston area take a look at it. Just seems to be an odd issue for me to figure out, but hoping its something simple for a knowledgeable shop, Thx
