Hi guys,
I'm almost the whole way through a 7mgte swap into my 86.5 n/a auto (well, my mechanic is, anyway
).
I got the engine fully rebuilt, and its all wired up (except the dash for the moment, but it has been connected in the past and works) ready to go... only problem is, it doesn't.
The car cranks over fine, but won't start. It has no injector pulse or spark.
I'm using an 89 harness, an 89 ecu and a 90 7mgte. I've got all grounds connected, everything that needs power is getting power, and the plugs which differ between pre and post 89 have been rewired.
NO I'm not gonna get a pre 89 harness as there arent any. I've looked. Plus it's cost me waaaay too much already.
Now before anyone suggests it, yes Ive got a new cps and a new ecu (still 89) and timing is right (as far as I'm aware).
The weird thing is, when you crank the engine over by hand there is injector pulse and spark, but as soon as you try it with the key it disappears.
Also after trying this for a few minutes the ecu starts to smell and get warm, which isn't good - this leads us to believe that there may be a short or fault in the harness somewhere...
What do you guys think?
If there is a short in the harness... how would we go about finding it?
If there's anything else it could possibly be, suggest away
Because this seems like a very weird problem...
Any help would be greatly appreciated as this has dragged on for months and it's driving me nuts!
I'm almost the whole way through a 7mgte swap into my 86.5 n/a auto (well, my mechanic is, anyway
).I got the engine fully rebuilt, and its all wired up (except the dash for the moment, but it has been connected in the past and works) ready to go... only problem is, it doesn't.
The car cranks over fine, but won't start. It has no injector pulse or spark.
I'm using an 89 harness, an 89 ecu and a 90 7mgte. I've got all grounds connected, everything that needs power is getting power, and the plugs which differ between pre and post 89 have been rewired.
NO I'm not gonna get a pre 89 harness as there arent any. I've looked. Plus it's cost me waaaay too much already.
Now before anyone suggests it, yes Ive got a new cps and a new ecu (still 89) and timing is right (as far as I'm aware).
The weird thing is, when you crank the engine over by hand there is injector pulse and spark, but as soon as you try it with the key it disappears.
Also after trying this for a few minutes the ecu starts to smell and get warm, which isn't good - this leads us to believe that there may be a short or fault in the harness somewhere...
What do you guys think?
If there is a short in the harness... how would we go about finding it?
If there's anything else it could possibly be, suggest away
Because this seems like a very weird problem...
Any help would be greatly appreciated as this has dragged on for months and it's driving me nuts!
