|
|
No power to coils fuel pump or injectors
|
|
|
| |
|
|
Pollycranopilis
New User
May 2, 2014, 1:38 PM
Post #1 of 7
(1323 views)
|
|
No power to coils fuel pump or injectors
|
Sign In
|
|
1988 Mazda RX7 Turbo after overheating has no spark and no power to coils, main relays have no power signal and no power to fuel pump and injectors, manually initiated the relays and got spark but have no idea why this is happening all these circuits are on same wire a black with white stripe but with key on it is grounded any help will be appreciated!
(This post was edited by Pollycranopilis on May 3, 2014, 4:18 PM)
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
May 2, 2014, 1:42 PM
Post #2 of 7
(1320 views)
|
|
Re: No power to coils fuel pump or injectors
|
Sign In
|
|
You said it overheated. Dis a wire get melted anythere?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
Discretesignals
Ultimate Carjunky
/ Moderator
May 3, 2014, 3:29 AM
Post #3 of 7
(1299 views)
|
|
Re: No power to coils fuel pump or injectors
|
Sign In
|
|
At the main relay do you have power on the following wires with the ignition on?
black/white
black/green
white/blue
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
|
|
| |
|
|
Pollycranopilis
New User
May 3, 2014, 11:18 AM
Post #4 of 7
(1282 views)
|
|
Re: No power to coils fuel pump or injectors
|
Sign In
|
|
Black\white =ground
black\green = +12v
white\blue = +12v
black/white =full ground key off key on is not full ground but 10v or so
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
May 3, 2014, 11:26 AM
Post #5 of 7
(1280 views)
|
|
Re: No power to coils fuel pump or injectors
|
Sign In
|
|
Something is pulling that voltage down on that wires so we are back to looking for melted or shorted wires.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
Discretesignals
Ultimate Carjunky
/ Moderator
May 3, 2014, 11:27 AM
Post #6 of 7
(1279 views)
|
|
Re: No power to coils fuel pump or injectors
|
Sign In
|
|
According the wiring schematic there are two black/white wires going to the main relay. Does the relay make a clicking noise when you turn the ignition on and off?
One black/white is hot when the ignition is turned on and powers the coil inside the relay.
The other black/white wire goes to the coils and injectors and is hot when the relay is energized. You have to make these checks with the relay plugged in. That means you have to back probe the relay connector and make your measurements.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on May 3, 2014, 11:28 AM)
|
|
| |
|
|
Pollycranopilis
New User
May 4, 2014, 9:57 AM
Post #7 of 7
(1257 views)
|
|
Re: No power to coils fuel pump or injectors
|
Sign In
|
|
coil on relay never energizes the b/w wire is not sending the +12 to it same wire goes to main relay for fuel injectors and ignition coils and the fuel pump
|
|
| |
|
Auto Repair Home
SEARCH
WHO'S 
LOG 
2006 Toyoto Camry XLE Driver Side Electric Window Trouble
Tierod end change caused some kind of leak
Grounding Cable, 2017 Jeep Renegade Trailhawk
equipment
Howdy
