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Wavy Dyno Graph?

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Old 02-06-2012, 05:34 PM   #1
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Default Wavy Dyno Graph?

Got a re-tune the other day since i put in a stall and 243's, Tuner told me I had a slight misfire under load that was probably ignition related and the Graph had a wavy hp curve

Plugs are NGK's and were changed with the wires about 20K ago

My coil pack wire has a small nick in it, so I'll start by fixing that and changing the fuel filter


Anybody had a graph look like this before?


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Old 02-06-2012, 08:40 PM   #2
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What's your compression and what Ngk plugs are you using?
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Old 02-06-2012, 08:59 PM   #3
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Looks like a problem with the pickup wire for the dyno. Not a car problem.
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Old 02-06-2012, 10:11 PM   #4
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Running the tr55s, not sure what the compression is.
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Old 02-08-2012, 08:19 AM   #5
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Smoothing of 1 probably has something to do with it
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Old 02-08-2012, 08:37 AM   #6
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Its hard to see in the pic, but smoothing is at 5, a/f was at 12:1
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Old 02-08-2012, 09:09 AM   #7
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Is it? On my phone it looks like a 1. Hard to see as the mobile sight squashes pictures.
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Old 02-09-2012, 06:09 PM   #8
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Yes, and the funny thing is, i cant tell any misfires when im driving. It shakes a little at idle, I believe thats just the cam and the poly mounts.
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Old 02-10-2012, 02:39 PM   #9
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Sampling rate should of cleared that up too.
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Old 02-11-2012, 10:43 AM   #10
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Quote:
Originally Posted by Slowhawk View Post
Looks like a problem with the pickup wire for the dyno. Not a car problem.
^This.

Mine did the same thing, and my Tuner said it was the pickup as well. EPS Cam Only LQ9... Video and Pics

Last edited by KC Henry; 02-11-2012 at 10:49 AM.
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