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What to check?

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Old 10-22-2016, 09:27 PM
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Default What to check?

Hello fellas , was a nic3 day decided to take the car out for a spin. Got on it a little to about 4500 RPM max. Now the car is misfiring or something, it's definitely not running on all cylinders was running perfect before they pulls. I'M RUNNING plugs 3346 ngk br7ef put a scanner on the car no engine codes. I changed the plugs nothing still doing the same thing. It's rough in the lower RPM range taking off but isn't so bad when you get past 2k RPM where should I start?
Old 10-22-2016, 09:31 PM
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Originally Posted by chevybayboy
Hello fellas , was a nic3 day decided to take the car out for a spin. Got on it a little to about 4500 RPM max. Now the car is misfiring or something, it's definitely not running on all cylinders was running perfect before they pulls. I'M RUNNING plugs 3346 ngk br7ef put a scanner on the car no engine codes. I changed the plugs nothing still doing the same thing. It's rough in the lower RPM range taking off but isn't so bad when you get past 2k RPM where should I start?
Check ur cam sensor or crank sensor...and coils
Old 10-22-2016, 09:31 PM
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And the car backfires like crazy
Old 10-22-2016, 09:32 PM
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Originally Posted by xdanny510x
Check ur cam sensor or crank sensor...and coils
Shouldn't a ASE code pop up for those?
Old 10-22-2016, 10:25 PM
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Ok changed out ignition coils, still same thing.
Old 10-23-2016, 07:36 AM
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I'd check the cam timing, chain may have jumped over the sprocket.
Old 10-23-2016, 08:33 AM
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Originally Posted by RockinWs6
I'd check the cam timing, chain may have jumped over the sprocket.
That's true. I'm going to hook a fuel pressure gauge up. It would be pretty hard for it to jump i have the chain guides in there.
Old 10-23-2016, 12:26 PM
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What to check?-20161023_122423.jpg
Found the culprit



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