4agze swap wiring woes!
Posted: Thu May 09, 2019 8:08 am
Alright y'all,
background story is I bought a 76 corolla sr5 with a non-running 4agze swap. The previous owner has had it for a number of years and wasn't able to ever get it running but I think all the bits and pieces are there but just needs a wiring fix. He suggests to go to a standalone like a megasquirt or haltech. I would personally like to try and get the 4agze running off all the parts that are in the car and see how it goes. Wiring is a bit of a mess though and I suspect my problem could be somewhere in the harness. I am new to the corolla world, not bad at wiring I can sort most things out and know how to run a multi meter but some help with the logic behind whats going on in the harness would sure help.
The motor is out of a 4agze afm/dli ae92. I am using the aw11 mr2 ecu pinout and wiring diagram off this website and it all seems to match up with what i have in the car but the distributor/cas is obviously slightly different.
The car straight up does not start. Turns over and once or twice i've gotten a little pop and sputter but she will not go. I even tried running it off starting fluid and nothing. I've verified that I have spark on all 4 cylinders. i've verified cam gear and crank timing and reinstalled the cas with the dimples lined up.
I began looking at the wiring that goes into the ecu and verifying grounds. my sensor grounds are a little suspect. we had the e22 wire(sensor ground 2) hooked to one of the main power grounds with a splice connector. I clipped it off and just tried pumping to the e2 ground to see if that would make a difference and nothing still.
Not anywhere near my breaking point yet but looking for some advice. I want to double check continuity from e2 and e22 in the harness to the THW THG THA AFM and TPS. I think these all carry sensor ground, guessing they wouldn't have ground to complete a circuit with a volt meter from battery positive to e2 and e22 but should have continuity thru the harness?
Also i am going to reattach the brown ground on the intake manifold tonight, i am talking the one by the injectors not the one from the back of intake to firewall, its currently hooked to the cold start injector which is all ripped off and rtv gasket'd, I am guessing power wont travel through rtv. where does this wire usually hook to on the intake?
any other advice y'all can give me? I am suspect there will be a few wiring fixes here i'll be doing, 3 maybe 4 splice connectors by the ecu I don't like the looks of.
background story is I bought a 76 corolla sr5 with a non-running 4agze swap. The previous owner has had it for a number of years and wasn't able to ever get it running but I think all the bits and pieces are there but just needs a wiring fix. He suggests to go to a standalone like a megasquirt or haltech. I would personally like to try and get the 4agze running off all the parts that are in the car and see how it goes. Wiring is a bit of a mess though and I suspect my problem could be somewhere in the harness. I am new to the corolla world, not bad at wiring I can sort most things out and know how to run a multi meter but some help with the logic behind whats going on in the harness would sure help.
The motor is out of a 4agze afm/dli ae92. I am using the aw11 mr2 ecu pinout and wiring diagram off this website and it all seems to match up with what i have in the car but the distributor/cas is obviously slightly different.
The car straight up does not start. Turns over and once or twice i've gotten a little pop and sputter but she will not go. I even tried running it off starting fluid and nothing. I've verified that I have spark on all 4 cylinders. i've verified cam gear and crank timing and reinstalled the cas with the dimples lined up.
I began looking at the wiring that goes into the ecu and verifying grounds. my sensor grounds are a little suspect. we had the e22 wire(sensor ground 2) hooked to one of the main power grounds with a splice connector. I clipped it off and just tried pumping to the e2 ground to see if that would make a difference and nothing still.
Not anywhere near my breaking point yet but looking for some advice. I want to double check continuity from e2 and e22 in the harness to the THW THG THA AFM and TPS. I think these all carry sensor ground, guessing they wouldn't have ground to complete a circuit with a volt meter from battery positive to e2 and e22 but should have continuity thru the harness?
Also i am going to reattach the brown ground on the intake manifold tonight, i am talking the one by the injectors not the one from the back of intake to firewall, its currently hooked to the cold start injector which is all ripped off and rtv gasket'd, I am guessing power wont travel through rtv. where does this wire usually hook to on the intake?
any other advice y'all can give me? I am suspect there will be a few wiring fixes here i'll be doing, 3 maybe 4 splice connectors by the ecu I don't like the looks of.