...

Go Back   Lateral-g Forums > Technical Discussions > LSX Conversions
User Name
Password



Reply
 
Thread Tools Display Modes
  #21  
Old 08-11-2015, 08:39 AM
Vega$69's Avatar
Vega$69 Vega$69 is offline
Lateral-g Supporting Member
 
Join Date: Aug 2012
Posts: 622
Thanks: 0
Thanked 2 Times in 2 Posts
Default

With a PSI harness you do not need a brake switch with a manual.

If you wired in a neutral safety or clutch switch it would not crank so thats not the problem.

When you first turn the key on you should hear the fuel pump run for a few seconds. That would indicate the fuel pump relay is working.

Then you need to determine if the ignition relay is working. The easiest way is to touch the relay and have someone turn key on to see if it clicks on.

The other common issue with not starting is the ground wires that attach to the head are either not connected or loose.
Reply With Quote
  #22  
Old 08-11-2015, 10:16 AM
Swain's Avatar
Swain Swain is offline
Lateral-g Supporting Vendor
 
Join Date: May 2007
Location: CA
Posts: 1,732
Thanks: 3
Thanked 23 Times in 12 Posts
Default

Quote:
Originally Posted by 79 Camaro View Post
If you hooked up the 12 volt switched to the original wire that runs to the coil and it was older style points ignition the coil wire will have a resistor built limiting voltage during run.

I've never heard of a brake light switch wired to the ECM when using a manual trans that would prevent it from starting. Only time I've seen it was to make the reverse lock out work like stock.

Try wiring the switched 12 volt to 12 volt constant just temporarily to see if it will fire. If it does disconnecting the wire will shut the computer down and shut off the engine.

From what I've read a bad cam sensor will not shut the engine down but a bad crank sensor will.
I ran a constant hot wire still nothing. Fans come on right away I heard that means theres a code. Shipping the ECU out to PSI today. This will be the best thing to do as they can program it to my specs.
__________________
Jason Swain



Build Link 68 Camaro
https://lateral-g.net/forums/showthread.php4?t=16865
Reply With Quote
  #23  
Old 08-11-2015, 10:27 AM
Vega$69's Avatar
Vega$69 Vega$69 is offline
Lateral-g Supporting Member
 
Join Date: Aug 2012
Posts: 622
Thanks: 0
Thanked 2 Times in 2 Posts
Default

Quote:
Originally Posted by Swain View Post
I ran a constant hot wire still nothing. Fans come on right away I heard that means theres a code. Shipping the ECU out to PSI today. This will be the best thing to do as they can program it to my specs.
Did you pull codes?

I had the same issue with the fans and the harness/ECU I used on my LS7 Build from PSI. As I recall the fan set up was set wrong in the ECM. I have HP Tuner and was able to correct it.
Reply With Quote
  #24  
Old 08-11-2015, 10:47 AM
cpd004's Avatar
cpd004 cpd004 is offline
Senior Member
 
Join Date: Feb 2006
Posts: 334
Thanks: 119
Thanked 18 Times in 14 Posts
Default

One thing that can make the fans come on (provided the ECM is configured properly for all else) is not hooking up some sort of check engine light.
__________________
1971 Firebird
2017 SS
Reply With Quote
  #25  
Old 08-11-2015, 10:47 AM
dhutton dhutton is offline
Senior Member
 
Join Date: Nov 2006
Location: Mountain Springs, Texas
Posts: 1,857
Thanks: 985
Thanked 448 Times in 247 Posts
Default

I recommend a low cost code scanner if you don't have one. Get one that lets you reset codes too. Very handy for these swaps.

Don
Reply With Quote
  #26  
Old 08-11-2015, 11:06 AM
Swain's Avatar
Swain Swain is offline
Lateral-g Supporting Vendor
 
Join Date: May 2007
Location: CA
Posts: 1,732
Thanks: 3
Thanked 23 Times in 12 Posts
Default

Quote:
Originally Posted by dhutton View Post
I recommend a low cost code scanner if you don't have one. Get one that lets you reset codes too. Very handy for these swaps.

Don
I have a scanner it will no link to ECU.

Tried everything lol.
__________________
Jason Swain



Build Link 68 Camaro
https://lateral-g.net/forums/showthread.php4?t=16865
Reply With Quote
  #27  
Old 08-11-2015, 11:08 AM
cpd004's Avatar
cpd004 cpd004 is offline
Senior Member
 
Join Date: Feb 2006
Posts: 334
Thanks: 119
Thanked 18 Times in 14 Posts
Default

My scanner wouldn't link when a fuse blew on the PSi harness. Changed the fuse and everything worked.
__________________
1971 Firebird
2017 SS
Reply With Quote
  #28  
Old 08-11-2015, 11:20 AM
dhutton dhutton is offline
Senior Member
 
Join Date: Nov 2006
Location: Mountain Springs, Texas
Posts: 1,857
Thanks: 985
Thanked 448 Times in 247 Posts
Default

Quote:
Originally Posted by Swain View Post
I have a scanner it will no link to ECU.

Tried everything lol.
Damn, you at least get A for effort..

Don
Reply With Quote
  #29  
Old 08-11-2015, 11:28 AM
Swain's Avatar
Swain Swain is offline
Lateral-g Supporting Vendor
 
Join Date: May 2007
Location: CA
Posts: 1,732
Thanks: 3
Thanked 23 Times in 12 Posts
Default

Quote:
Originally Posted by cpd004 View Post
My scanner wouldn't link when a fuse blew on the PSi harness. Changed the fuse and everything worked.
Checked all the fuses 5 times or more ha. I wish it was simple something so simple. Prolly is
__________________
Jason Swain



Build Link 68 Camaro
https://lateral-g.net/forums/showthread.php4?t=16865
Reply With Quote
  #30  
Old 08-11-2015, 11:35 AM
dhutton dhutton is offline
Senior Member
 
Join Date: Nov 2006
Location: Mountain Springs, Texas
Posts: 1,857
Thanks: 985
Thanked 448 Times in 247 Posts
Default

Quote:
Originally Posted by Swain View Post
Checked all the fuses 5 times or more ha. I wish it was simple something so simple. Prolly is
What about all your grounds? How is everything grounded?

Don
Reply With Quote
Reply

Thread Tools
Display Modes

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

Forum Jump


All times are GMT -5. The time now is 08:58 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright Lateral-g.net