FP relay clicks with MS but not with stock ECU - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


ECUs and Tuning Discuss Engine Management, Tuning, & Programming

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 01-14-2011, 08:59 PM   #1
Elite Member
Thread Starter
iTrader: (39)
 
Zabac's Avatar
 
Join Date: Sep 2007
Location: High Point NC
Posts: 4,854
Total Cats: 8
Default FP relay clicks with MS but not with stock ECU

1994 MAF'less, Brainbuilt MS and harness, AEM wb, nothing else...

Car ran fine for while, no issues with MS at all since install.
Problem started last night.
Denso B577 fuel pump relay clicks non stop with ign on.
Car will crank all day with no start.
Unplug MS plug in stocker clicking stops (no MAF or oxygen sensor so didn't try to start with stocker plugged in).
Replaced with known good Denso B577 relay and still clicks with MS plugged in.
No other relays are clicking.
Car will not start with FP shorted at Diag. box and still clicks.
MS LED's 1 and 3 stay lit, do not blink with relay click, LED 2 stays of even while cranking.
MS has communication.
Resistance reads low on FP relay.

Where should I look next?

Thanks in advance!!!

-Zabac


ps-Scott, no boost solenoid
Zabac is offline   Reply With Quote
Old 01-14-2011, 09:12 PM   #2
Elite Member
Thread Starter
iTrader: (39)
 
Zabac's Avatar
 
Join Date: Sep 2007
Location: High Point NC
Posts: 4,854
Total Cats: 8
Default

***UPDATE***
Unplugged MS again, plugged in ECU (no MAF no o2)
Car started for a second and died as expected.
Unplugged ECU plugged in MS, no more clicking.
Car started like nothing ever happened.

Do I have an intermittent short in MS harness or in the MS itself?

Thanks

-Zabac
Zabac is offline   Reply With Quote
Old 01-17-2011, 11:54 AM   #3
Supporting Vendor
 
Matt Cramer's Avatar
 
Join Date: Sep 2006
Posts: 2,266
Total Cats: 51
Default

Does the clicking on/off happen kind of randomly, or in precise 1 second intervals? The former would be a sign of a short, the latter is a type of error message.
Matt Cramer is offline   Reply With Quote
Old 01-24-2011, 12:12 PM   #4
Elite Member
Thread Starter
iTrader: (39)
 
Zabac's Avatar
 
Join Date: Sep 2007
Location: High Point NC
Posts: 4,854
Total Cats: 8
Default

Rythmical...about one sec apart.
Have not had any more issues with it since then, but worried it may come back to haunt me when I least expect it.
You think it is MS related? And any suggestions where I may look with more attention.
Thanks
Zabac is offline   Reply With Quote
Old 01-24-2011, 12:44 PM   #5
Supporting Vendor
 
Matt Cramer's Avatar
 
Join Date: Sep 2006
Posts: 2,266
Total Cats: 51
Default

Yeah, that's the config error version of a clicking fuel pump. Try opening Mini-Terminal under the Communications menu in your tuning software and turn the key off and back on again - that should give you an error message about the problem.
Matt Cramer is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 59 Yesterday 09:00 PM
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
Expected intake temps on the track? tazswing Race Prep 20 10-03-2015 12:04 PM
Going back to stock. Need some 1.6 parts. Trent WTB 2 10-01-2015 01:15 PM
Walbro 255lph Fuel Pump $50 lsc224 Miata parts for sale/trade 2 10-01-2015 10:17 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 07:12 AM.