Datamaster Logged run, RPM's not very smooth?
Datamaster Logged run, RPM's not very smooth?
Got around to doing a logged run, after I got my fuel system worked out. Car runs great. But after reviewing the log, the RPM's do not look very smooth in the graphs. I am by no means an expert with Datamaster so maybe this is completely normal?
File located below
http://www.mediafire.com/?gjjoxnnmjw7
File located below
http://www.mediafire.com/?gjjoxnnmjw7
Your RPM at idle is set to 900rpm, but its varying from 675-975rpm in the section I looked at. While that's a fairly wide range, it appears you have a decent sized cam, with about 66-69kPA MAP at idle (hence the DTC for high MAP, low vacuum). Low vacuum seems to be fairly common with the LE cams. How well it will idle will be highly dependent on the quality of the tune. Near the end of the log, the MAP goes really high at idle (80kPa) and the IAC is open to over 90 counts to hold the idle.
Once you start to drive, the RPM seems to respond correctly to changes in the throttle position.
Once you start to drive, the RPM seems to respond correctly to changes in the throttle position.
Your RPM at idle is set to 900rpm, but its varying from 675-975rpm in the section I looked at. While that's a fairly wide range, it appears you have a decent sized cam, with about 66-69kPA MAP at idle (hence the DTC for high MAP, low vacuum). Low vacuum seems to be fairly common with the LE cams. How well it will idle will be highly dependent on the quality of the tune. Near the end of the log, the MAP goes really high at idle (80kPa) and the IAC is open to over 90 counts to hold the idle.
Once you start to drive, the RPM seems to respond correctly to changes in the throttle position.
Once you start to drive, the RPM seems to respond correctly to changes in the throttle position.
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F'n1996Z28SS
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Aug 23, 2023 11:19 PM



