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88 iroc z 350 rpms bouncing

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Old 09-11-2014, 12:27 AM
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Car: 88 Camaro IROC-Z 350 L98
Engine: 350 L98
Transmission: 700R
Axle/Gears: Stock
88 iroc z 350 rpms bouncing

Hello. I'm having some weird activity when I let off my gas. Let's say I'm going 50 mph and I let off the gas. Once my rpm get to about 1500 it start to bounce around and you can hear the exhaust making a "drone" noise. Here's a vid I uploaded. https://m.youtube.com/watch?v=mJoPSGbCpuE
Old 09-11-2014, 08:50 AM
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Car: 1989 IROC LSX
Engine: 5.7 TPI - LS1 Forged by LME
Transmission: 700r4 - 4L60E
Axle/Gears: 3.23 - 3.73
Re: 88 iroc z 350 rpms bouncing

I don't see a problem if you are shifting thru gears. Fill out your profile so we can see and know what make and model you are working on.
Old 09-11-2014, 10:06 AM
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Car: 88 Camaro IROC-Z 350 L98
Engine: 350 L98
Transmission: 700R
Axle/Gears: Stock
Re: 88 iroc z 350 rpms bouncing

Originally Posted by jazzdadss
I don't see a problem if you are shifting thru gears. Fill out your profile so we can see and know what make and model you are working on.
Thanks for the reply. I will upload another vid this one might not show like I want it to. Its like if its trying to figure out which gear to get in. You can hear the exhaust just "droning". Its hard to explain and it doesn't happen every time.
Old 09-11-2014, 11:40 AM
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Join Date: Dec 2009
Location: Texas
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Car: 1989 IROC LSX
Engine: 5.7 TPI - LS1 Forged by LME
Transmission: 700r4 - 4L60E
Axle/Gears: 3.23 - 3.73
Re: 88 iroc z 350 rpms bouncing

Is it just the tach acting up or is the engine cutting out while this is happening? I see when your tach falls so does your oil pressure. almost like something was cutting fire to the engine.
Old 09-11-2014, 11:41 AM
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Car: 88 Camaro IROC-Z 350 L98
Engine: 350 L98
Transmission: 700R
Axle/Gears: Stock
Re: 88 iroc z 350 rpms bouncing

Yes it's the engine cutting. U can hear it. When I press the gas it will stop.
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