Like Tree1Likes

525 efi no spark

Reply
Old 08-19-2017, 05:22 AM
  #1
Registered
Thread Starter
 
Join Date: Aug 2017
Posts: 4
Default 525 efi no spark

Ive got a 525 efi with no spark after renovation. The engine stands on a pallet for start up before installation in boat.

When i turn on ignition the fuel pump runs for 3 sec. I also got 12V to the ignition coils as long as the fuel pump is running. But at the same time the relay cuts the circuit for the fuel pump it also cuts the power to the ignition coils. I dont get 12V when im cranking the engine. Should it do that?

I can perform ignition coil test with the computer. When performing that, should the ignition coils pulse and give spark to the plugs? Because i can hear a sound but cant hear any pulses.

Any ideas?
hotrod1932 is offline  
Reply With Quote
Old 08-19-2017, 12:42 PM
  #2
Registered
 
Join Date: Feb 2012
Location: westville, NJ
My Boats: 1967 34 Hatteras summer house. 2000 Crownline 248ccr her boat. 79 Pantera 24 Sport.
Posts: 3,896
Default

So you hooked it up on a test stand as if it is in the boat? And it ran before you pulled it? Go back over all the connections. Most likely you missed one. Possibly a ground.
dereknkathy is offline  
Reply With Quote
Old 08-19-2017, 01:50 PM
  #3
Platinum Member
Platinum Member
Trade Score: (5)
 
F-2 Speedy's Avatar
 
Join Date: May 2012
Location: Midwest & T-Rock
My Boats: F-2 Speed Racer
Posts: 4,385
Default

are you wired into the cannon plug on the engine harness with the ignition key ?
F-2 Speedy is offline  
Reply With Quote
Old 08-20-2017, 01:09 AM
  #4
Registered
Thread Starter
 
Join Date: Aug 2017
Posts: 4
Default

Ive got 12V on one of the big pins, ground on the other and also 12V on the ignition pin.
hotrod1932 is offline  
Reply With Quote
Old 08-20-2017, 08:54 AM
  #5
VIP Member
VIP Member
 
class6's Avatar
 
Join Date: Oct 2015
Location: Lake George, NY
My Boats: 06 Pantera 24
Posts: 1,109
Default

Black= ground
purple = ign coil
red/purple=battery
red/yellow=starter
class6 is offline  
Reply With Quote
Old 08-20-2017, 09:40 AM
  #6
Platinum Member
Platinum Member
Trade Score: (5)
 
F-2 Speedy's Avatar
 
Join Date: May 2012
Location: Midwest & T-Rock
My Boats: F-2 Speed Racer
Posts: 4,385
Default

This is how I wired mine, sounds the same as yours, make sure your wired correctly on the switch
Attached Thumbnails
525 efi no spark-20170422_173056_resized.jpg  

Last edited by F-2 Speedy; 08-20-2017 at 09:44 AM.
F-2 Speedy is offline  
Reply With Quote
Old 08-20-2017, 10:05 AM
  #7
Registered
 
Join Date: Apr 2008
Location: grosse ile, mich
My Boats: 05 cig 42 tiger,w/ 525
Posts: 1,184
Default

Check your crank sensor,,,the computer needs to see a crank signal,,,or it shuts down the fuel pumps
TWIN-SPINS is offline  
Reply With Quote
Old 08-20-2017, 10:08 AM
  #8
Registered
 
Join Date: Feb 2012
Location: westville, NJ
My Boats: 1967 34 Hatteras summer house. 2000 Crownline 248ccr her boat. 79 Pantera 24 Sport.
Posts: 3,896
Default

But there is also the ecm. You have had everything unhooked and reconnected. You had spark before. You don't now. When you do something to anything and something else doesn't work, in virtually all cases, you just did it.
mike tkach likes this.
dereknkathy is offline  
Reply With Quote
Old 08-20-2017, 10:15 AM
  #9
VIP Member
VIP Member
 
class6's Avatar
 
Join Date: Oct 2015
Location: Lake George, NY
My Boats: 06 Pantera 24
Posts: 1,109
Default

Is the motor still completely wired to a cannon plug?
class6 is offline  
Reply With Quote
Old 09-09-2017, 06:28 AM
  #10
Registered
Thread Starter
 
Join Date: Aug 2017
Posts: 4
Default Update

Hi again,

Thanks for all replys. Just an update and some info to make things easier.

I bought the engine blown. So i dont know if it was working when i bought it but i assume so because it was blown.

- The ECM has been tested and came out ok.
- When I turn on ignition i got 12v to the coils, but it will just last for about 2-3 seconds. After you hear the mainpower relay shut off the power to the coils disappear.
- When I crank the engine it the ignition coils just get about 0.5V.
-When measure connection between the fuse for the coil and ground it comes out that they are connected (strange I think?). But when I crank the engine the connection between coil and ground cuts of. Should it be like this? If so, why do I only get 0.5V to the coils while cranking?

Somebody told me to check the cranksensor. Ive measure on the connection to one fuel injector and it seems like the sensor are working because I've got pulses for the injector when cranking.

Ideas?

(I wanted to post some pics but the forum said that im not allowed)
hotrod1932 is offline  
Reply With Quote
Reply



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 On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 11:51 AM.


Copyright 2011 OffShoreOnly. All rights reserved.