mike171562

iTrader: (4)

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?

litle88

iTrader: (20)

What's your compression and what Ngk plugs are you using?

Slowhawk

iTrader: (12)

Looks like a problem with the pickup wire for the dyno. Not a car problem.

mike171562

iTrader: (4)

Running the tr55s, not sure what the compression is.

Sarg

iTrader: (6)

Smoothing of 1 probably has something to do with it

mike171562

iTrader: (4)

Its hard to see in the pic, but smoothing is at 5, a/f was at 12:1

Sarg

iTrader: (6)

Is it? On my phone it looks like a 1. Hard to see as the mobile sight squashes pictures.

mike171562

iTrader: (4)

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.

mebuildit

Sampling rate should of cleared that up too.

KC Henry

^This.

Mine did the same thing, and my Tuner said it was the pickup as well. https://ls1tech.com/forums/dynamomet...ideo-pics.html