Help with LS3 Motor
Thread Starter
Teching In
Joined: Jan 2010
Posts: 25
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Help with LS3 Motor Hi Im Ian from the Philippines and Im just recently got an LS3 motor and am doing a transplant into a bmw 3 series!
Now I need help with some problems.
I have some wiring sockets without the connections and I was wondering what are the essentials to getting this engine running?
Now I know I need the MAF which was not included, and I noticed the engine is drive by wire so will I need the throttle of a corvette as well?
I think the empty sockets are for the Fusebox will I need this too?
my mechanic said I may need the Body control module and Key with immobilizer to start this as well?
would anyone have the wiring diagram of this engine?
Many thanks in advance for your expert advice!
Now I need help with some problems.
I have some wiring sockets without the connections and I was wondering what are the essentials to getting this engine running?
Now I know I need the MAF which was not included, and I noticed the engine is drive by wire so will I need the throttle of a corvette as well?
I think the empty sockets are for the Fusebox will I need this too?
my mechanic said I may need the Body control module and Key with immobilizer to start this as well?
would anyone have the wiring diagram of this engine?
Many thanks in advance for your expert advice!
Thread Starter
Teching In
Joined: Jan 2010
Posts: 25
Likes: 0
I forgot to mention that the guy who sent me the engine mentioned that I can send him my ECU back so they can reprogram it to start without the key and immobilizer, now I feel like he is already trying to rip me off since our first agreement was a running motor!
Hi Im Ian from the Philippines and Im just recently got an LS3 motor and am doing a transplant into a bmw 3 series!
Now I need help with some problems.
I have some wiring sockets without the connections and I was wondering what are the essentials to getting this engine running?
Now I know I need the MAF which was not included, and I noticed the engine is drive by wire so will I need the throttle of a corvette as well?
I think the empty sockets are for the Fusebox will I need this too?
my mechanic said I may need the Body control module and Key with immobilizer to start this as well?
would anyone have the wiring diagram of this engine?
Many thanks in advance for your expert advice!
Now I need help with some problems.
I have some wiring sockets without the connections and I was wondering what are the essentials to getting this engine running?
Now I know I need the MAF which was not included, and I noticed the engine is drive by wire so will I need the throttle of a corvette as well?
I think the empty sockets are for the Fusebox will I need this too?
my mechanic said I may need the Body control module and Key with immobilizer to start this as well?
would anyone have the wiring diagram of this engine?
Many thanks in advance for your expert advice!
Not having the MAF is no big deal, you can buy them online for around $50.
One of those connector is for the relay/fuse box, the other may be for the gauge cluster.
You don't need to get the factory GM fusebox, the factory harnesses are nearly stand-alone. You one need the fuel pump relay, fan relay, starter relay and if I'm not forgetting anything thats it. You can integrate the harness into the factory BMW relay box.
You also don't need the body control module to start the engine, but you will have to reprogram the ECM to disable the anti-theft system.
Cool swap you have there!
From what I know, the gauge cluster in the E46 3 series uses CAN. So you'll probably have to use aftermarket dials or if you're good with electronics, you can open the cluster, remove the CAN related electronics and wire everything up directly.
Thread Starter
Teching In
Joined: Jan 2010
Posts: 25
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The LS3 was a Gen-4 engine, all of them had drive by wire, none had a regular cable operated throttle. Best is to keep the DBW.
Not having the MAF is no big deal, you can buy them online for around $50.
One of those connector is for the relay/fuse box, the other may be for the gauge cluster.
You don't need to get the factory GM fusebox, the factory harnesses are nearly stand-alone. You one need the fuel pump relay, fan relay, starter relay and if I'm not forgetting anything thats it. You can integrate the harness into the factory BMW relay box.
You also don't need the body control module to start the engine, but you will have to reprogram the ECM to disable the anti-theft system.
Cool swap you have there!
From what I know, the gauge cluster in the E46 3 series uses CAN. So you'll probably have to use aftermarket dials or if you're good with electronics, you can open the cluster, remove the CAN related electronics and wire everything up directly.
Not having the MAF is no big deal, you can buy them online for around $50.
One of those connector is for the relay/fuse box, the other may be for the gauge cluster.
You don't need to get the factory GM fusebox, the factory harnesses are nearly stand-alone. You one need the fuel pump relay, fan relay, starter relay and if I'm not forgetting anything thats it. You can integrate the harness into the factory BMW relay box.
You also don't need the body control module to start the engine, but you will have to reprogram the ECM to disable the anti-theft system.
Cool swap you have there!
From what I know, the gauge cluster in the E46 3 series uses CAN. So you'll probably have to use aftermarket dials or if you're good with electronics, you can open the cluster, remove the CAN related electronics and wire everything up directly.
thank you for you help.
TECH Senior Member
Joined: Jul 2009
Posts: 8,034
Likes: 663
SSHHHHHH,
What year BMW is that? I like it alot. Should be killer. Try sending the harness to www.speartech.com for a harness mod and might as well have him (John Spears) do the ECM while he's at it. His work & tech advice both before and after his work is top notch
I will be sending my ECM to him in a few months. You get what you pay for.
What year BMW is that? I like it alot. Should be killer. Try sending the harness to www.speartech.com for a harness mod and might as well have him (John Spears) do the ECM while he's at it. His work & tech advice both before and after his work is top notch
I will be sending my ECM to him in a few months. You get what you pay for.
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Teching In
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From: SC 29069 Lamar and CA Mission Viejo 92691
Great project!
I also bought a LS3 but it was without harness and ECM. The easiest way is to buy a GMPP LS3 controller kit like this http://paceperformance.com/index.asp...&ProdID=228370
If you have a plan to change a cam then you will need to reprogram the ECM. On this site you can find member FROST who can help you to reprogram the ECM if needed.
Good luck !
I also bought a LS3 but it was without harness and ECM. The easiest way is to buy a GMPP LS3 controller kit like this http://paceperformance.com/index.asp...&ProdID=228370
If you have a plan to change a cam then you will need to reprogram the ECM. On this site you can find member FROST who can help you to reprogram the ECM if needed.
Good luck !
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Thread Starter
Teching In
Joined: Jan 2010
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Thread Starter
Teching In
Joined: Jan 2010
Posts: 25
Likes: 0
Help again! With electrical problems! The engine shut off after two sessions. The power to weight is brilliant! I cant wait to tune the suspension.
I brought her out for her 1st birthday, a year in the build and I shook her down to bad the electrical dint hold up, time to troubleshoot the issues!
http://www.youtube.com/watch?v=q7ihE7nMCDQ
what is the LED light in the fusebox? Basically my engine cranks but it doenst start, the LED light in the fusebox doensnt turn on.
It stated for two days but during shakedown gave up on me.
I noticed that I was running super rich as well, Is my aftermarket 280LPH fuel pump to strong for the engine since it doesnt have a fuel return?
I have the GMPP LS3 harness kit on it now. Looking for some help again.
how easy is it to tune this ECU?
Thank you again.
Thank you!
I brought her out for her 1st birthday, a year in the build and I shook her down to bad the electrical dint hold up, time to troubleshoot the issues!
http://www.youtube.com/watch?v=q7ihE7nMCDQ
what is the LED light in the fusebox? Basically my engine cranks but it doenst start, the LED light in the fusebox doensnt turn on.
It stated for two days but during shakedown gave up on me.
I noticed that I was running super rich as well, Is my aftermarket 280LPH fuel pump to strong for the engine since it doesnt have a fuel return?
I have the GMPP LS3 harness kit on it now. Looking for some help again.
how easy is it to tune this ECU?
Thank you again.
Thank you!