Running MS2 V3 2.89 code on a VW4 cyl. direct coil control.
So reviewing my logs after a cold start my coolant sensor feed is pretty steady along with the intake air sensor. After a hot start though its shakey throughout the log. Intake air sensor stays pretty steady, but coolant temp is a jagged line. I've checked the wiring and the grounds. Anyone have any idea why the output from the sensor is only effected after a hot start.
I've attached logs of a cold and hot start and my msq.
unstable coolant sensor feed after hot start
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
unstable coolant sensor feed after hot start
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kjones6039
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Re: unstable coolant sensor feed after hot start
Not to worry!! 
Both logs look quite normal IMO. In the first log your clt went from ~66 to ~190 degrees, a difference of ~125 degrees. In the second log your temp only varied ~24 degrees which accounts for the more jagged looking trace spread across the vertical axis of the log.
I have seen this many times and it does not indicate a problem.
Ken
Both logs look quite normal IMO. In the first log your clt went from ~66 to ~190 degrees, a difference of ~125 degrees. In the second log your temp only varied ~24 degrees which accounts for the more jagged looking trace spread across the vertical axis of the log.
I have seen this many times and it does not indicate a problem.
Ken
1979 Corvette - 383 CID SBC w/ Holley Pro-Jection 900 CFM TBI, 4-85 lb lo-z injectors & Walbro 255 pump
MS2 v3 w/ms2extra 3.4.0 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
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MS2 v3 w/ms2extra 3.4.0 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7
Re: unstable coolant sensor feed after hot start
Thats good to know and makes sense. Thanks.