Help Me! Bad ECU?? Again!!??
05-24-09, 03:24 PM
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Help Me! Bad ECU?? Again!!??
1987 turbo 2 all stock bought it last year with a blown coolant seal, rebuilt the engine over the winter, put the engine in yesterday and wasnt getting any injector pulse. So I switched out the ECU and it fired right up... Today it still fired up ran it a half dozen times. Then I kill it, run to the gas station get a can of gas and when I get back dump the gas in and go to start it and it just cranks... Then I look in the fuse block under the hood and the ECM COMP. fuse is blown. So I replace it and still just cranks no fire. Pop the plug wires off and I am not getting any spark. Could the ECU have fried again? Since the fuse blew I am assuming there must be a short somewhere... I am not sure where to begin. And the none of the gauges on the cluster were working except the speedo.
Any info or possible places to look for wiring issues would be greatly appreciated.
Thanks in advance.
Any info or possible places to look for wiring issues would be greatly appreciated.
Thanks in advance.
05-24-09, 03:32 PM
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All the solenoids on the left side of the engine have one black/white wire and the ACV on the right side of the engine also has two solenoids, each with a black/white wire.
All the black/white wires get fed by the EGI COMP fuse.
ONe of them is shorted to gnd.
Most likely one of the black/white wires to the ACV's solenoids.
See the free online wiring diagrams for the car.
All the black/white wires get fed by the EGI COMP fuse.
ONe of them is shorted to gnd.
Most likely one of the black/white wires to the ACV's solenoids.
See the free online wiring diagrams for the car.
05-24-09, 03:54 PM
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having a similar issue with the car i just picked up. afr is way off and i dont think the ecu can handle the new 13bt engine in it. is there a good piggyback out there?
05-24-09, 04:06 PM
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It means 12A all ways^
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Is the ACV all what you call all those solenoids that are connected to the rats nest? I have removed all of that and have no emissions at all. And what color would the connector be at the end of these black/ white wires?
Thankyou HAILERS!
I was refered to you by a friend. I was going to message you if all else failed.
Thankyou HAILERS!
I was refered to you by a friend. I was going to message you if all else failed.
All the solenoids on the left side of the engine have one black/white wire and the ACV on the right side of the engine also has two solenoids, each with a black/white wire.
All the black/white wires get fed by the EGI COMP fuse.
ONe of them is shorted to gnd.
Most likely one of the black/white wires to the ACV's solenoids.
See the free online wiring diagrams for the car.
All the black/white wires get fed by the EGI COMP fuse.
ONe of them is shorted to gnd.
Most likely one of the black/white wires to the ACV's solenoids.
See the free online wiring diagrams for the car.
05-25-09, 08:13 AM
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HAILERS
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The ACV is on the intake manifold on the right side of the engine. The second jpg shows what it looks like.
The BLACK/WHITE wire goes to all the solenoids shown in the first jpg. The solenoids location is shown in the FUEL AND EMISSIONS section of the FSM.
The EGI COMP fuse feeds a W/L wire at the fuse box...........the W/L goes to the MAIN RELAY........the main relay closes when the key is put to ON..........the W/L wire feeds the B/W wire thru the contacts inside the main relay.....the B/W wire has many wires (all B/W) spliced to it and they feed the solenoids shown in the first jpg.
So it'll be one of those wires that is shorted to gnd.
The BLACK/WHITE wire goes to all the solenoids shown in the first jpg. The solenoids location is shown in the FUEL AND EMISSIONS section of the FSM.
The EGI COMP fuse feeds a W/L wire at the fuse box...........the W/L goes to the MAIN RELAY........the main relay closes when the key is put to ON..........the W/L wire feeds the B/W wire thru the contacts inside the main relay.....the B/W wire has many wires (all B/W) spliced to it and they feed the solenoids shown in the first jpg.
So it'll be one of those wires that is shorted to gnd.
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05-25-09, 12:33 PM
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http://www.rotorwiki.com/index.php/S...cal_Schematics
On a series four car, any wire that is black with a white stipe is a power wire. Any power wire that touches the chassis or the engine will "short to ground" and blow the fuse.
Somewhere one of the black/white wires is touching the engine/chassis. So if you removed all of the solenoids on the left side of the engine, just what did you do with the electrical plugs that attached to the solenoids?
On a series four car, any wire that is black with a white stipe is a power wire. Any power wire that touches the chassis or the engine will "short to ground" and blow the fuse.
Somewhere one of the black/white wires is touching the engine/chassis. So if you removed all of the solenoids on the left side of the engine, just what did you do with the electrical plugs that attached to the solenoids?
05-25-09, 09:39 PM
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Thankyou HAILERS. I found the short it was one of the wires gounding underneath the upper intake manifold...
You sir are The Man!
Keith
You sir are The Man!
Keith
http://www.rotorwiki.com/index.php/S...cal_Schematics
On a series four car, any wire that is black with a white stipe is a power wire. Any power wire that touches the chassis or the engine will "short to ground" and blow the fuse.
Somewhere one of the black/white wires is touching the engine/chassis. So if you removed all of the solenoids on the left side of the engine, just what did you do with the electrical plugs that attached to the solenoids?
On a series four car, any wire that is black with a white stipe is a power wire. Any power wire that touches the chassis or the engine will "short to ground" and blow the fuse.
Somewhere one of the black/white wires is touching the engine/chassis. So if you removed all of the solenoids on the left side of the engine, just what did you do with the electrical plugs that attached to the solenoids?
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