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Old 08-11-2007, 06:05 PM   #1
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Default added TPS, now no CLT or Bat. Voltage!

So I added a TPS using the instructions from the MSPNP manual (remove R6, R7, and add two jumpers) but now have some really weird stuff going on.

I no longer have a correct coolant temp reading. It is stuck at 170F. And the voltmeter is stuck on something like 29.998V. Also, I have some nasty idle-hunting now. Plus, if I turn on the AC (just added a belt...it's been off since before going MS and turbo), and the car stalls coming to idle while driving, every time.

Anybody have any ideas?
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Old 08-11-2007, 06:11 PM   #2
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https://www.miataturbo.net/forums/sh...ad.php?t=11792 read my post, it's the second one. it'll help you with the AC stall at light thing.
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Old 08-11-2007, 06:18 PM   #3
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Quote:
Originally Posted by Dow.tom View Post
https://www.miataturbo.net/forums/sh...ad.php?t=11792 read my post, it's the second one. it'll help you with the AC stall at light thing.
I'll give that a try. Thanks.
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Old 08-11-2007, 06:20 PM   #4
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:scratches head:
sorry man. Jerry said he was going out of town. Hopefully Matt Cramer will check the forum soon.

At least does the TPS work?
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Old 08-11-2007, 06:20 PM   #5
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One thing I just thought of about the CLT which is odd...the fan turns on...but that's set for 175F...?

I checked a quick datalog to see if maybe MegaTune was just being wonky with displaying the CLT, but the log had 170F constant.
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Old 08-11-2007, 08:13 PM   #6
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Ok, this is weird also. When I open a subwindow in MegaTune, the gauge freeze-frame shows CLT accurately.

I can't get the idle sorted. It's WORSE with the TPS!
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Old 08-11-2007, 08:20 PM   #7
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2 things
1> Did you restart your laptop?
2> Idle settings need to get tweaked.

I'm ******* bored as ****, at home alone on a Saturday night. Let's fix the ******.
B

PS, #1 is rhetorical.
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Old 08-11-2007, 08:28 PM   #8
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Haha

My idle AFRs are jumping all over the place.

I'll give you a call after dinner with the wife
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Old 08-12-2007, 07:09 PM   #9
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Ok, this CLT issue is bad, real bad.

I hooked the Palm into the MS to see if it gave the same readings for CLT and BatVolt that MegaTune did (170F and 29.88V), and the PalmTune showed CLT of 1017F and BatVolt of 29.88V, which explains why the fan is now on constantly (1014>175).

Also, cold cranks aren't very fun when the MS isn't triggering cold-start enrichments, even when ambient is 90F.

So anybody have an idea as to what I screwed up?

Last edited by Atlanta93LE; 08-12-2007 at 07:58 PM.
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Old 08-12-2007, 08:11 PM   #10
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Quote:
Originally Posted by Atlanta93LE View Post
Ok, this CLT issue is bad, real bad.

I hooked the Palm into the MS to see if it gave the same readings for CLT and BatVolt that MegaTune did (170F and 29.88V), and the PalmTune showed CLT of 1017F and BatVolt of 29.88V, which explains why the fan is now on constantly (1014>175).

Also, cold cranks aren't very fun when the MS isn't triggering cold-start enrichments, even when ambient is 90F.

So anybody have an idea as to what I screwed up?
Question is when you open up the megasquirts, did you cross a wire or did solder make a connection it shouldn't have.
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Old 08-12-2007, 08:13 PM   #11
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You realize you have to set up the Palm software to match your sensors. Make sure you read through PalmLogs site (http://www.blessedmemories.net/Palm/PalmLog.htm) and change the resistance values to match the stock sensors (you will have to use EasyTherm to get the correct values). As far as your battery voltage goes, can't really offer any assistance there.
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Old 08-12-2007, 08:14 PM   #12
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Check my thread for the wrong collant temp. Your CLT is wrong because you removed either r4 or r7. I forget which one is the resistor for coolant but you need that in for the CLT to read correctly. I will put money on thats what is wrong.
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Old 08-12-2007, 08:19 PM   #13
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Quote:
Originally Posted by shuiend View Post
Check my thread for the wrong collant temp. Your CLT is wrong because you removed either r4 or r7. I forget which one is the resistor for coolant but you need that in for the CLT to read correctly. I will put money on thats what is wrong.

I am wondering at also... wish I had exp with mega, cause I am just a stone throw away, from him. Where is ben...lol
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Old 08-12-2007, 08:51 PM   #14
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Quote:
Originally Posted by karter74 View Post
You realize you have to set up the Palm software to match your sensors. Make sure you read through PalmLogs site (http://www.blessedmemories.net/Palm/PalmLog.htm) and change the resistance values to match the stock sensors (you will have to use EasyTherm to get the correct values). As far as your battery voltage goes, can't really offer any assistance there.
Yeah, I did that before I ever hooked up the Palm. Palm had been reading temps just fine previously.
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Old 08-12-2007, 08:52 PM   #15
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Quote:
Originally Posted by shuiend View Post
Check my thread for the wrong collant temp. Your CLT is wrong because you removed either r4 or r7. I forget which one is the resistor for coolant but you need that in for the CLT to read correctly. I will put money on thats what is wrong.
Interesting...the MSPNP manual instructs to remove R7 for the TPS mod...
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Old 08-12-2007, 08:55 PM   #16
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R7 gets burned off when you do the TPS mod. It's gone on mine, and my Coolant temps sensor works right, and has since the mod was done.
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Old 08-12-2007, 09:18 PM   #17
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Quote:
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R7 gets burned off when you do the TPS mod. It's gone on mine, and my Coolant temps sensor works right, and has since the mod was done.
You have a photo for him to look at, maybe he crossed a wire. I am really thinking something is in the wrong pin.
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Old 08-12-2007, 09:35 PM   #18
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Quote:
Originally Posted by wildfire0310 View Post
You have a photo for him to look at, maybe he crossed a wire. I am really thinking something is in the wrong pin.
I actually called Ben for verification on his modded board to make sure I was wiring the correct pins. They're correct. The only thing I can think of inside the unit is some midplaced solder, but I was really careful and inspected before putting it all together and didn't see anything.
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Old 08-12-2007, 09:56 PM   #19
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Ben did you pull R7 from the daughterboard or the main board?
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Old 08-12-2007, 10:04 PM   #20
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Uh oh. From the main board. I didn't even see R6 or R7 on the daughter board.
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