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data log reading

jrsrkrkr

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Hello forum,
I was wondering if any forum members would offer a hand at data log reading. I am getting a random multiple misfire so i do not know which cylinder to look at.
My car is 19 gt vert a10 pp1 with gen 5 whipple and fore fuel return system.
 

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jrsimon27

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Hello forum,
I was wondering if any forum members would offer a hand at data log reading. I am getting a random multiple misfire so i do not know which cylinder to look at.
My car is 19 gt vert a10 pp1 with gen 5 whipple and fore fuel return system.

At least you dont have knock.
Your tuner should check your log
 

SolarFlare

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At quick glance I didn’t see anything bad on the log. Might want to pull your plugs, check gap or regap to .026 or so. You need to get the codes and post them. If you have ngk6510s maybe consider trying some brisk RR12s.
 

Dominant1

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Do a crank relearn procedure with your hand held tuning device. I had the same issue but only on wot pulls would it misfire. I did a crank relearn and it fixed it. No more misfires..
 

TX-Ripper

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Do a crank relearn and see if it helps
 

Jackson1320

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Hello forum,
I was wondering if any forum members would offer a hand at data log reading. I am getting a random multiple misfire so i do not know which cylinder to look at.
My car is 19 gt vert a10 pp1 with gen 5 whipple and fore fuel return system.
[/
What is your vacuum at idle
 

jrsrkrkr

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jrsrkrkr

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At quick glance I didn’t see anything bad on the log. Might want to pull your plugs, check gap or regap to .026 or so. You need to get the codes and post them. If you have ngk6510s maybe consider trying some brisk RR12s.
Solarflare,
I have changed plugs twice in the last 300 miles. Used Ngk 6510s. Have not tried the Brisks yet.
thanks Jerry
 

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jrsrkrkr

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Do a crank relearn procedure with your hand held tuning device. I had the same issue but only on wot pulls would it misfire. I did a crank relearn and it fixed it. No more misfires..
thanks Dominate1,
I did a crank relearn on the Ngauge. I will try again,
 

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Hello forum,
I was wondering if any forum members would offer a hand at data log reading. I am getting a random multiple misfire so i do not know which cylinder to look at.
My car is 19 gt vert a10 pp1 with gen 5 whipple and fore fuel return system.
+1 for crank relearn
 

Jackson1320

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The log looks fine. What codes? If just a p0300 I would check the charging system and battery. With just p0300 and the log looking spot on it is the only thing that makes sense if it’s not a crank relearn. If there’s more codes then they will send you in the right direction. Random cylinder misfire doesn’t really mean random it just means more than one cylinder and not constant
 
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jrsrkrkr

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The log looks fine. What codes? If just a p0300 I would check the charging system and battery. With just p0300 and the log looking spot on it is the only thing that makes sense if it’s not a crank relearn. If there’s more codes then they will send you in the right direction. Random cylinder misfire doesn’t really mean random it just means more than one cylinder and not constant
Jackson,
Thanks for the reply. Yes P0300 is the only thing that shows up when reading codes. The check engine light flashes for about 15-20 seconds and goes off.
I assumed it meant it was running rich and CEL was a warning of possible damage to the cats.
I will check the electrical system output.. thanks again.
Jerry
 

Dominant1

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if you have cats check them out, they could be failing.
 

TX-Ripper

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I wonder if a simple crank relearn would fix it.
 

Jackson1320

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Your imrc’s may be acting up. There’s been a lot of problems with imrc’s even on brand new cars. They only need to be off a little bit to throw off the ecm. you will get misfires on one side of the engine. But not all the time
 

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