supra cranks but no start, please help

T

___toyota7mgte___

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Jun 3, 2006
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Hi everyone, my 89 5-speed 7mgte wont start. I have spark, and fuel pressure but no injector pluse. I have changed the CPS, injectors resistor and, ECU. I have also checked the wiring from ECU to resistor it all checks out. When the resistor is pluged in, i have resistance in both sides of the injector plug. When I crank the engine it starts for about 2-5 sec. then dies. it feels like the cold start injector is the only one that works.
Please help!!!
 
Bishop92t

Bishop92t

Supramania Contributor
Apr 18, 2005
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Check engine error codes. Ensure your ECU grounds are connected. What was the last thing you did to the car since it last ran?
 
shaeff

shaeff

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and for shits and giggles, check the 7.5A IGN fuse in the driver's side fuse box behind the kick panel. :)

-shaeff
 
T

___toyota7mgte___

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Jun 3, 2006
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colorado,USA
Bishop92t said:
Check engine error codes. Ensure your ECU grounds are connected. What was the last thing you did to the car since it last ran?
Click to expand...
my error codes were 21,52. the last thing i did was tried to fix the sheilded wire on the O2 sensor, i ran another sheilded wire from the computer to the O2 sensor and grounded the sheilded part. I tried to fire it up, and it wouldn't start. I took off all the stuff that I did, and it still wouldn't start...
 
T

___toyota7mgte___

New Member
Jun 3, 2006
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colorado,USA
shaeff said:
and for shits and giggles, check the 7.5A IGN fuse in the driver's side fuse box behind the kick panel. :)

-shaeff
Click to expand...

I didn't check that fuse, because i thought it was only for the ignition switch. But I will certainly do that, and if that's what was wrong with it, then I deserve to be kicked in the head...:icon_conf
 
T

___toyota7mgte___

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Jun 3, 2006
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colorado,USA
MDCmotorsports said:
They should have brass lugs on them attached to the back of the intake or under the intake. They are a total of 4 wires, pair in 2's.
Click to expand...
those bunch of wires are hooked up. the car ran for about 2 week after i build my engine sence then i only touched the harrness at the ECU and over the cams. after building my engine i couldnt pass the smog test. i tired to run another wire for the O2 due to the 21 error code and she stopped starting.
 
T

___toyota7mgte___

New Member
Jun 3, 2006
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colorado,USA
So what do i do when i have spark at the coils but no injector pulse, all grounds are hooked up (i even have a engine ground kit). I checked the CPS with a ohm meter and it shows change in position when I spin it.
 
T

___toyota7mgte___

New Member
Jun 3, 2006
19
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colorado,USA
Jetjock,
So what do i do when i have spark at the coils but no injector pulse, all grounds are hooked up (i even have a engine ground kit). I checked the CPS with a ohm meter and it shows change in position when I spin it.
 
T

___toyota7mgte___

New Member
Jun 3, 2006
19
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colorado,USA
Jetjock, The + side of the injector circuit is the 3 wires(white, white-blue, white-red )at the plug to the ECU, right?
If so, I checked the 3 wires from ecu to the injector plugs. now another thing, when I ohm tested the 3 wires from ecu to plugs I had resistance at both sides of the plugs, is that normal? and only if the resistor is pluged in.
 
IHI-RHC7

IHI-RHC7

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Apr 1, 2005
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To clarify, the positive connection is in the round four wire connector on the driver's sode fender. ;)
 
Nick M

Nick M

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Sep 9, 2005
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I have also checked the wiring from ECU to resistor it all checks out.
Click to expand...
If it all checked out, it would start.

Don't make assumptions when trying to diagnose a problem. You can not skip steps in the diagnostic flow charts.
 
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