Coolant temp. reading maxed out at 215F

For discussing how to choose sensors and create a wiring harness for all Bowling and Grippo versions of the MegaSquirt® EFI controller.
Forum rules
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.
Post Reply
portmod7
Helpful Squirter
Posts: 74
Joined: Thu Mar 01, 2012 7:49 am

Coolant temp. reading maxed out at 215F

Post by portmod7 »

Hi,

I have a MS-II v.3.0 software v.2.905.

I was running my engine the other day, trying to get the idle, timing, etc. squared away, and it started running a little hot because I didn't have my cooling fans working correctly. I was concentrating on the coolant temperature reading from my MS on Tuner Studio, it was reading at 215F. I have two other analog gauges on my truck for a backup reading, I happened to glance at them and they were both showing a temperature of 250F. So it got a little too hot on me while I was watching the TS gauges.

Can anyone think of a reason my TS gauge would max out a 215? The sender I'm using is the GM sender from DIY Auotune. I've tried recalibrating the Themistor table, but it didn't seem to change anything. I plugged my Stimulator in and turned the coolant temp up and got a reading all the way up to 245 in Tuner Studio.

The fact that TS will show a high reading with the Stim connected leads me to believe something is wrong with my sender, but it is new. Does anyone else have any theories?

Thanks!
Matt Cramer
Super Squirter
Posts: 2951
Joined: Sat Jul 03, 2004 11:35 am

Re: Coolant temp. reading maxed out at 215F

Post by Matt Cramer »

Check to make sure you have "Expanded_CLT_TEMP" activated under Project Properties.
portmod7
Helpful Squirter
Posts: 74
Joined: Thu Mar 01, 2012 7:49 am

Re: Coolant temp. reading maxed out at 215F

Post by portmod7 »

Thank you Matt. I definitely do not have that activated. Searching through TS, I noticed that, but couldn't ever find anywhere that said what it was, or what I should set it to, etc. I'm 99% sure it's off on my setup. Hopefully that will solve the problem. Thank You!

Edit: I did find where it talked about it in the MegaManual, but I thought it was for high-temperature cases such as an air-cooled setup. I wasn't sure if it pertained to me. I also wasn't sure why it would work with my stim, but not on the actual vehicle. I just mostly wanted to make sure I didn't have a problem somewhere.
Post Reply