No fuel or spark, needing help big time guys

Bigzavs

Bigzavs

86.5 1JZ Single Turbo
Apr 21, 2005
2,267
0
0
39
Arlington, TX
hey guys, im still having problems with my car. right now ive got no spark and my injectors are not firing at all. I had a blown cap in my ecu, i got that replaced early last week at ATS in denton. Then i found a broken wire on my harness near the connector, it was the very far bottom right red wire on the far right ecu connector, which my friend said is ignition power to the ecu, well i re-soldered that together. and i still have nothing. i used my test light and im not getting power to the far two wires on that connector. i get power to the wires right next to them but not at the two at the far side. i also checked and ive got power to the injectors and the coils when i have the key turned. i changed out the cam position sensors and the crank position sensor, and my ignitor is good, i tested that on a friends MKIV and he started and drove on it. i also checked all my fuses and they are good as well. im stumped over it, im not really electrically inclined at all, so if you guys might know what it is please chime in, if i cant figure it out this weekend its gonna go to a shop to get whatever the problem is fixed.


thanks guys
 
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tissimo

tissimo

Stock is boring :(
Apr 5, 2005
4,238
0
0
40
Melbourne, FL
any codes?

which wires are getting power and which arnt?
sm_photo_missing.jpg
 
Bigzavs

Bigzavs

86.5 1JZ Single Turbo
Apr 21, 2005
2,267
0
0
39
Arlington, TX
im not throwing any codes i was throwing a code 14 but im pretty sure that was because of the wire that was broken

heres the pins i was talking about
p802954_1.jpg
 
tissimo

tissimo

Stock is boring :(
Apr 5, 2005
4,238
0
0
40
Melbourne, FL
is the cel flashing or on at all? sound like the ecu isn't turning on.. I'm assuming the car ran before? if not check the EA2 connector and make sure Pin 2 and pin 5 are wired correctly.

check to make sure M-Rel (pin 3 on same coonector next to Batt) has power as well (key on of course)
 
S

suprastanger507mgte

2x88+2x89+1x91+2x92=ME
Apr 5, 2005
3,148
6
38
Hayward , Ca
tissimo said:
is the cel flashing or on at all? sound like the ecu isn't turning on.. I'm assuming the car ran before? if not check the EA2 connector and make sure Pin 2 and pin 5 are wired correctly.

check to make sure M-Rel (pin 3 on same coonector next to Batt) has power as well (key on of course)
Click to expand...

Pretty sure this will solve your issue right here.
 
tissimo

tissimo

Stock is boring :(
Apr 5, 2005
4,238
0
0
40
Melbourne, FL
do you have a volt meter? or using a test light to check for power? Try a voltmeter.. Not sure if M-rel will give enough current to light a bulb (maybe a led)
 
Bigzavs

Bigzavs

86.5 1JZ Single Turbo
Apr 21, 2005
2,267
0
0
39
Arlington, TX
unfortunately i dont have a volt meter, probably have to wait for a couple friends to come over saturday to get that. im just using a test light for right now
 
tissimo

tissimo

Stock is boring :(
Apr 5, 2005
4,238
0
0
40
Melbourne, FL
if +b and +b1 arn't getting any power I'd say the Main relay isn't turning on and not giving power to the ecu.. I'm surprised that the cel is working without those powered. If M-rel has 12v but still no power at +b or +b1 then its either the wiring to it or the main relay its self. If m-rel doesn't have 12v, it might be the ecu. but you might be able to bypass that..

edit: just for shits and gigles check the efi fuse.. replace it with another 15A and give it a shot..
 
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Bigzavs

Bigzavs

86.5 1JZ Single Turbo
Apr 21, 2005
2,267
0
0
39
Arlington, TX
well ill go try it real quick, i do know this, with the key on and not trying to crank it, the main relay is getting pretty hot, i tried swapping it out but nothing happened, ill go swap it again and change the efi fuse as well
 
p5150

p5150

ASE and FAA A&P Certified
Mar 31, 2005
1,176
0
36
Central Idaho
based on your post it sounds like quick disconnect C1... Did you have 12v at B+ on the check connector?
 
Bigzavs

Bigzavs

86.5 1JZ Single Turbo
Apr 21, 2005
2,267
0
0
39
Arlington, TX
ok swapped the main relay and the efi fuse and still nothing

on the C1(thats the connector iirc) since i have a 87 harness, of the top three pins the left and the right have power, but the middle on the top and the two bottoms have no power with the key turned over
 
tissimo

tissimo

Stock is boring :(
Apr 5, 2005
4,238
0
0
40
Melbourne, FL
ahh yea.. if Batt is getting 12v then the efi fuse is fine.. doh.. must be the relay, wiring, or the ecu

edit: in your old post you said re redid the wiring? did you mess with C1 at all? what colors are where? might be backwards there somewhere.. how did you wire C1?
 
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p5150

p5150

ASE and FAA A&P Certified
Mar 31, 2005
1,176
0
36
Central Idaho
Im talking about the check connector that you bridge T1 and TE1 to check the timing. There should be a b+ pin there. What is the voltage on it?
 
p5150

p5150

ASE and FAA A&P Certified
Mar 31, 2005
1,176
0
36
Central Idaho
That circuit is the same that the B1 and B on the ecu pull power from. It is activated by the EFI relay. There are a lot of components that tap off of that circuit. If you have power at the check connector then you have a wire connection issue in the circuit.
 
Bigzavs

Bigzavs

86.5 1JZ Single Turbo
Apr 21, 2005
2,267
0
0
39
Arlington, TX
tissimo said:
ahh yea.. if Batt is getting 12v then the efi fuse is fine.. doh.. must be the relay, wiring, or the ecu

edit: in your old post you said re redid the wiring? did you mess with C1 at all? what colors are where? might be backwards there somewhere.. how did you wire C1?
Click to expand...

the re-wiring i did was on the resistor pack wiring for the mkiv 550s. i dont think i touched any of the wires to the C1 connector, and the wiring was done by Dr.Tweak, and the car ran and drove with the resistor pack and mkiv injectors on for 100 miles before the problems started
 
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