check engine light on/off ????
check engine light on/off ???? Just about done wiring LS2 T56 combo in a 68 Camaro. I used the E40 computer with a J1 connector from EFI. I wired the OBD port with the orange wire to batt source (constant) and two blacks to ground. Hooked up check engine brown wire to light and ground.
When I move the ignition to the on position should the ck light illuminate??? ( as in my daily driver). Haven't tried to fire car up yet waiting for a few small items still.
Thanks
BobH
When I move the ignition to the on position should the ck light illuminate??? ( as in my daily driver). Haven't tried to fire car up yet waiting for a few small items still.
Thanks
BobH
Thanks guys... Hey on the pinout #16 , the 12v from ignition side is the correct hook up?? or is a 12v battery hook up?
Thanks
BobH
BTW EFI , my LS2 (E40 computer) FI/Coils is through connector 101 and receives batt 12v directly from underhood power center. Just checking because that is the way read the diagram. Is that incorrect?
Thanks
BobH
BTW EFI , my LS2 (E40 computer) FI/Coils is through connector 101 and receives batt 12v directly from underhood power center. Just checking because that is the way read the diagram. Is that incorrect?
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo I didn't use the powertrain relay. I used the original 68 camaro starting circuit. The American wire harness had a 12v Batt and 12v ignition built-in which I wired to e40 .
I then made a small fused circuit panel under hood to power FI/COIL ,rev l/o and fans. Simular to the factory arrangement.
Thks
BobH
Thks Steve,
I didn't use the powertrain relay. I used the original 68 camaro starting circuit. The American wire harness had a 12v Batt and 12v ignition built-in which I wired to e40 .
I then made a small fused circuit panel under hood to power FI/COIL ,rev l/o and fans. Simular to the factory arrangement.
Thks
BobH
I didn't use the powertrain relay. I used the original 68 camaro starting circuit. The American wire harness had a 12v Batt and 12v ignition built-in which I wired to e40 .
I then made a small fused circuit panel under hood to power FI/COIL ,rev l/o and fans. Simular to the factory arrangement.
Thks
BobH
If it were me, I would put the ignition relay in it. Running the whole EFI harness through.the ignition switch probably isnt a very good idea. Not sure what a 68 Camaro ignition switch is rated at, but cars didnt have much load on them back then. I know ive seen melted connectors on ignition switches of many 67-72 trucks. Relay would take the load off the. Switch. Just my $0.02.
What Nova 71 said is correct. The early stuff did not have 8 coils, 8 injectors,
O2's, maf, trans, ecu, etc. Steve
Yesterday 04:30 AM
Thank You. Point well taken and appreciated. I will look into the Ignition relay. Any ideas where to wire the relay?
Thanks
BobH
Use the wire you're powering everything up with now to power your relay, on pin #85, then pin #86 to ground. Then put a fused constant power to pin #30 and the other side pin #87 to your fuse box powering up your harness.
On The Tree
Joined: Sep 2012
Posts: 134
Likes: 0
From: New Taxes York
Been running the LS2 (E40 and OBDii) for over a year wired up the way you are with no relay and haven't had any issues with ignition, starting, etc. The harness is from the car the engine came out of, powered through a Painless fuse panel, right to the '69 harness (that's in perfect condition).
I suppose I can throw a relay in for giggles.
I suppose I can throw a relay in for giggles.
Been running the LS2 (E40 and OBDii) for over a year wired up the way you are with no relay and haven't had any issues with ignition, starting, etc. The harness is from the car the engine came out of, powered through a Painless fuse panel, right to the '69 harness (that's in perfect condition).
I suppose I can throw a relay in for giggles.
I suppose I can throw a relay in for giggles.
Take it from someone who watched in horror as their own car burned, it's not a good feeling. It was on my Nova, It was all stock at the time and to this day I don't know what caused it, other than it was the wiring on the firewall, but I got it out in time, I was lucky.
The way I am currently wired is 12v from car harness to the computer, only 3 wires. The FI/COIL are wired to a separate direct 12v from batt to a fused panel in engine compartment.( also contains fused and cb electric fans) I am not running an over abundance through the 12v ignition wire at ignition switch.
I am missing anything that is a high draw item in the LS2/T56 harness that comes off computer power? Fuel pump comes off 12v fused and relay through American Auto Wire harness.
Appreciate the information,
BobH
I am missing anything that is a high draw item in the LS2/T56 harness that comes off computer power? Fuel pump comes off 12v fused and relay through American Auto Wire harness.
Appreciate the information,
BobH
The way I am currently wired is 12v from car harness to the computer, only 3 wires. The FI/COIL are wired to a separate direct 12v from batt to a fused panel in engine compartment.( also contains fused and cb electric fans) I am not running an over abundance through the 12v ignition wire at ignition switch.
I am missing anything that is a high draw item in the LS2/T56 harness that comes off computer power? Fuel pump comes off 12v fused and relay through American Auto Wire harness.
Appreciate the information,
BobH
I am missing anything that is a high draw item in the LS2/T56 harness that comes off computer power? Fuel pump comes off 12v fused and relay through American Auto Wire harness.
Appreciate the information,
BobH