warmup issues... AGAIN - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


MEGAsquirt A place to collectively sort out this megasquirt gizmo

Reply
 
 
 
LinkBack Thread Tools
Old 12-26-2007, 12:17 PM   #21
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,813
Total Cats: 1,780
Default

CLT is too low. you should hit at least 205 at idle. cruise should be 180-190 Fans kick on at 207

do you have a digital multimeter? just measure the resistance at the thermosensor plug yourself.

my email is spauldingsd (at) gmail
Braineack is offline   Reply With Quote
Old 12-26-2007, 12:28 PM   #22
Elite Member
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,730
Total Cats: 2
Default

160 - 175 idle is wrong, neither I nor Arkmage have those numbers.

Youre 175 idle is what I had with the wrong Bias, and the problems you describe are identical to mine.

You wanna do an experiment without changing anything?

Go drive your car, let it warm up. Shut it off and restart it, let it idle crazy rich, then unplug the AIT. If your idle clears up, we were in the same boat.
Saml01 is offline   Reply With Quote
Old 12-26-2007, 12:35 PM   #23
Hittin' Boost & Cones
Thread Starter
iTrader: (2)
 
240_to_miata's Avatar
 
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,572
Total Cats: 11
Default

sam... its COOLANT not AIT that im having an issue with.... the AIT is set on STOCK gm sensor and is corrected for heat soak
240_to_miata is offline   Reply With Quote
Old 12-26-2007, 12:47 PM   #24
Elite Member
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,730
Total Cats: 2
Default

Quote:
Originally Posted by 240_to_miata_OWNER View Post
sam... its COOLANT not AIT that im having an issue with.... the AIT is set on STOCK gm sensor and is corrected for heat soak
*****, you aint hearin right.

I had the same problem you are having. Its an experiment. Let the car warmup, drive it, and get the richness you mention after restart. Unplug the AIT SENSOR. If your idle clears up we were in the same boat.

Its all about math man, the MS is one giant calculator. When you pull the MAF it defaults to a -40F intake temp, that offsets the fact that the MS thinks the motor is colder then it actually is.

Do that, then report back.
Saml01 is offline   Reply With Quote
Old 12-26-2007, 12:50 PM   #25
Hittin' Boost & Cones
Thread Starter
iTrader: (2)
 
240_to_miata's Avatar
 
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,572
Total Cats: 11
Default

ok ok.. ill try

ps...where is my stock CLT sensor located?
240_to_miata is offline   Reply With Quote
Old 12-26-2007, 12:54 PM   #26
Elite Member
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,730
Total Cats: 2
Default

Quote:
Originally Posted by 240_to_miata_OWNER View Post
ok ok.. ill try

ps...where is my stock CLT sensor located?
Below the crank angle sensor, at the back of the head. Its gonna be a bitch to reach unless you have the hands of a 5 year old.

But dont worry about it now, just do what I told you.

Then we will worry about setting up the right therm settings.
Saml01 is offline   Reply With Quote
Old 12-26-2007, 12:55 PM   #27
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,813
Total Cats: 1,780
Default

nothing pops out on your file.

turn the overboost protection to a positive number....maybe 10psi. not -14.7.

try turning baro corrections in the engine constants off.


but your CLT is still wrong. idle until your fans kick on, CLT should read 207-210 If not, the bias is incorrect.
Braineack is offline   Reply With Quote
Old 12-26-2007, 01:06 PM   #28
Hittin' Boost & Cones
Thread Starter
iTrader: (2)
 
240_to_miata's Avatar
 
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,572
Total Cats: 11
Default

not only is my CLT value wrong... my IAT sensor IS wrong

i have a thermometer saying it is 40* out and i put my IAT sensor in open atmosphere (just held it up in the air) ...its reading 55*

back to the easytherm values.... uhhhgg

i just turned my baro correction off in the engine constants and made the min and max kpa values out of the reachable window... set it to 255.... and the baro correction guage reads 98% still?
240_to_miata is offline   Reply With Quote
Old 12-26-2007, 01:09 PM   #29
Elite Member
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,730
Total Cats: 2
Default

Quote:
Originally Posted by 240_to_miata_OWNER View Post
not only is my CLT value wrong... my IAT sensor IS wrong

i have a thermometer saying it is 40* out and i put my IAT sensor in open atmosphere (just held it up in the air) ...its reading 55*

back to the easytherm values.... uhhhgg
Use the firmware compiler to compile the values into the firmware, and then burn using the BAT file that comes with the firmware.

I had nothing but problems using easy therm to burn, and compile the firmware. I also had problems with MS2 downloader.

If Baro is off it doesnt matter, fuggedaboutit. Concentrate on what we tell you to concentrate on. And stop fighting us, resistance is futile.
Saml01 is offline   Reply With Quote
Old 12-26-2007, 01:16 PM   #30
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,813
Total Cats: 1,780
Default

the problem with the default values is the range of the average. the numbers we are inputting are an average of the range given by mazda. something like 12000-19000ohms for -20 the average being 16200 or wahtever it is.

go in the kitchen and measure your actual sensors. then verify the reistance on the thermosensor harness itself, reflash the values.
Braineack is offline   Reply With Quote
Old 12-26-2007, 01:20 PM   #31
Hittin' Boost & Cones
Thread Starter
iTrader: (2)
 
240_to_miata's Avatar
 
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,572
Total Cats: 11
Default

ok the fans kicked in at 176.... where is my coolant temp sensor... im goin to the damn kitchen


btw i shut the car off at 176* and tried to start it back up... warmup kicked in at 200% again...worked its way down to 150% and is staying
240_to_miata is offline   Reply With Quote
Old 12-26-2007, 01:32 PM   #32
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,813
Total Cats: 1,780
Default

your CLT is exactly 30 off. Almost like you put too much bias resistance in it when you flashed it.

the scale is most likely off, if you look at your thermfactor.inc file, you can probably see once it hits a certain temp it fails the sensor, and that's why the enrichments are kicking in.
Braineack is offline   Reply With Quote
Old 12-26-2007, 02:22 PM   #33
Elite Member
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,730
Total Cats: 2
Default

Be sure to measure the resistance values at or near zero, get it as cold as you can, then get it to like 100F and then boil it.

Might as well do it right if you are gonna reinvent the wheel.
Saml01 is offline   Reply With Quote
Old 12-26-2007, 02:48 PM   #34
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,813
Total Cats: 1,780
Default

Braineack is offline   Reply With Quote
Old 12-26-2007, 03:26 PM   #35
Hittin' Boost & Cones
Thread Starter
iTrader: (2)
 
240_to_miata's Avatar
 
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,572
Total Cats: 11
Default

problem found...
Input Data: Temp, degF Resistance
; -4 1600
; 68 2450
; 140 580

Notice i wrote 1600 instead of 16000...... so my whole thermofactor was messed up
Ill reflash 2morro and check the accuracy then before i go into the kitchen

thanks alot for leading me to the thermfactor file...

I used to be an electrical engineering major..changed to mechanical after realizing how much i hate software... make sense now? haha
240_to_miata is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
mslabs MS2 - Idle control issue ndragun MEGAsquirt 0 09-20-2015 11:28 PM
Cold weather warmup troubles urabus MSPNP 5 11-07-2010 08:43 PM
Tnuerstudio MAT vs warmup correction miatauser884 MEGAsquirt 6 10-01-2010 04:35 PM
Too lean on warmup? paulj MEGAsquirt 3 04-07-2010 04:14 PM
car forgets about warmup enrichments N3v MEGAsquirt 5 01-23-2009 02:44 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 09:36 AM.