Making My Own 3400 Engine Wire Harness

[xtremesunfire]

Hi Guys
I just want to know how hard would it be if I made my own 3400 engine wire harness for my sunfire? because I would need to know what all sensors I would need to get to do this.

[korbendallas68]

Make your own? Like from scratch? Prolly hard.

Or are you going to use a harness from a 3x00 car?

[xtremesunfire]

well from scratch probley because if I get it from a 3100/3400 I would still need to cut it up to make it work with my sunfire

[Azrael]

I imagine it would still be a good idea to have a 3x00 harness as a reference to see how wires were grouped together and routed. It'd help to keep things uncluttered.

[xtremesunfire]

i got the wire diagrams and i dont know if that would help me out or not

[sharkey]

we need some more info here. what year sunfire is it going into??? what ecm do you plan to run. are you gonna run a 5 speed or auto???

honestly, id go for an 92-94 cavy wiring harness and ecm and make that work. either that or get a megasquirt and the universal wiring harness and build from there.

[korbendallas68]

I agree with sharkey. I look for a harness from an older cavi (V6) and use that. Save yourself the hours of headache.

[xtremesunfire]

its going to be going into a 96 and im getting my 99 ecu reprogammed

[sharkey]

your ecu will not run a v6 and thats all there is to it. you would be best off to use a v6 j-body wiring and ecu, or go megasquirt. you will have to still figure the gauges out. the 96 cluster is controlled by a microchip in the cluster, and i beleive the ecu sends the signals out for the gauges.

[xtremesunfire]

did I say I was getting a ecu from a 99 grand am with the 3400 or I might not have said that