Lost RPM- Newbie!

Tuning concepts, methods, tips etc.

Moderators: jsmcortina, muythaibxr

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Nikki
MS/Extra Newbie
Posts: 6
Joined: Sun Aug 23, 2015 6:48 pm

Lost RPM- Newbie!

Post by Nikki »

Hey everyone,
I am a huge newbie on here so please be patient, I am learning.
I have an 85 Supra,2jz with Megasquirt M3.
I did some highway pulls earlier today and noticed that at around 6300 RPM she gave a nice pop.
I decided to do a data log and noticed i had a spot where i had 0 RPM.
Any ideas what would cause this?
jsmcortina
Site Admin
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Location: Birmingham, UK
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Re: Lost RPM- Newbie!

Post by jsmcortina »

Please post the actual datalog file and your MSQ. (See Forum help page.)

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

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Nikki
MS/Extra Newbie
Posts: 6
Joined: Sun Aug 23, 2015 6:48 pm

Re: Lost RPM- Newbie!

Post by Nikki »

Okay i added them,
Hopefully this time it worked!
Nikki
MS/Extra Newbie
Posts: 6
Joined: Sun Aug 23, 2015 6:48 pm

Re: Lost RPM- Newbie!

Post by Nikki »

Anyone ??
Matt Cramer
Super MS/Extra'er
Posts: 17507
Joined: Thu Apr 16, 2009 8:08 pm

Re: Lost RPM- Newbie!

Post by Matt Cramer »

This is lost sync reason 17 - a problem with the second trigger. Can you capture the loss of sync in a composite log? This will help distinguish if it's noise vs wrong trigger edges, both of which can cause the problem.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
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