7 volts at fuel pump? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members

Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

LinkBack Thread Tools Search this Thread
Old 10-29-2014, 03:43 PM   #1
Junior Member
Thread Starter
iTrader: (2)
Join Date: Oct 2013
Location: Arcade, New York
Posts: 116
Total Cats: -4
Default 7 volts at fuel pump?

My car has been sitting for 8-9 months but ran great when parked. It's been stored inside and out of weather. I removed the ecu as I was going to megasquirt but my plans have changed. My car is a 91 1.6. I did remove the stock tps with a variable one and replaced the o2 sensor with a wideband sensor. The wideband is a mtxl. From my understanding I can use the wideband sensor I just have to use the brown wire from the mtxl harness which is a narrow band signal. So I checked fuel pump relay and harness as per all-data testing, all good.

Also tested the vaf or maf depending who you talk too for continuity and it also passes the test. I can't understand why I only have 7volts to my fuel pump. I pulled the pump and jumped it with 12volts and the pump is indeed good. So anyone have a clue why I am only seeing 7 volts? I read that the cas, vaf, and o2 signal feed the fuel pump unless I read it wrong. Any help or direction so I can get my car running again would be appreciated.
Miatacrazy716 is offline   Reply With Quote
Old 10-29-2014, 06:10 PM   #2
iTrader: (1)
Join Date: Sep 2011
Location: Boston, MA
Posts: 21
Total Cats: -2

Check for resistance on the ground side.
heyitznosaj is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 59 12-15-2017 09:00 PM
Walbro 255lph Fuel Pump $50 lsc224 Miata parts for sale/trade 2 10-01-2015 10:17 AM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM
why is my car running like pewp? (tune/datalog) itsMikey MSPNP 3 09-28-2015 07:40 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 11:19 PM.