Hey guys, I don't usually post on here problems I have because I can usually find the answer by searching. I have been stuck with this problem for about two weeks. My 1jz sc300 has been running fine up until 2 weeks ago. The car just would not start, the starter got hot and it sounded as if the starter couldn't turn the car over. Stupidly I thought it was the starter and I bought another one and it still wouldn't work!

I took out the plugs, and the engine was flooded with fuel!! I changed the plugs and oil. Also I bought a new crankshaft sensor, I tested the resistance on the two crank sensors, checked all of the fuses and I tested my igniter on my buddy's Sc, they all checked out fine.

Also when the ignition switch is at the on position, all of the coils are getting power, and the igniter is getting power. I also checked for any codes, and there are not any. Since then I have not flooded the engine again either.

Any advice or suggestions are appreciated,

Thanks
Ryan

 

Do a compression test. Lack of compression could account for a no-start as well. If the engine doesn't turn over,something may be binding on the inside.

 

ohh yea its cranking, and turning over, but no spark to start.

Thanks

 

Actually I just checked my ecu and one of my capacitors have leaked/burnt out. Could this possibly be the problem?? I hope so.

 

Pull the efi relay when testing for spark. Ground a spark plug to the motor outside of the cylinder to see if it gets spark when you turn it over. It will not flood due to the efi relay being pulled.



You have 2 camshaft sensors and 1 crankshaft sensor, make sure all are in spec.

 

**Update**
I have replaced all capacitors on the ecu and still not start. It sounded like it almost did, it kind of half way sputtered. I'll try and pull the efi relay to ground the plugs, also does anyone know the correct specific resistance to test the cam sensors on the 1jz?

Thanks

 

Does anyone have any suggestions?? Im just getting so frustrated with it!!

 

***Update***, I have diagnosed and diagnosed!! I found out that, I am getting power and ground on all the correct points on the igniter and the noise filter, when the ignition is switched in the on position. I cranked the engine, and the ground wires on the coils did not pulse, they stayed at a 10-12v, actually both wires on each coil.

Could this possibly point to my igniter not intermittently grounding the spark plugs?

Thanks

 

Check your cam sensor change them out if you can.

 

Same thing just happened to me on my 1JZ. Ended up being my igniter.

 

I'll try and different igniter in a few days. I hope that's the problem, thanks. If not I'll have to get sme new cam sensors.

Thanks

 

im having the same problem it wad running i change the injectors then i didnt get no spark i just bout a new ignitor and still no spark open the ecu and theres nothin wrong with that i can figure it out ???

 

pull out a coil and plug, ground the threads of the plug on the engine, crank the car and visually check for spark. if you have spark it could be that your injectors you just swapped in are stuck closed. it's sounds unlikely but I just went through a month of electrical diagnosis only to find out 4 of 6 of the 440cc injectors I put in were stuck closed

 

Cam sensors and crank sensor need to be tested, but I dont know the resistance. 2JZ resistance for both sensors are:

Cold 835 ~ 1,400 W
Hot 1,060 ~ 1,645

It is likely that the 1JZ sensors will be the same or close, but no guarantees there It may tell you something though, if both cam sensors are not similar.

You could also swap your friends ECU in and see if that works. If you tested your igniter on his car and it worked fine, It could still be the ECU at this point.

 

1JZ and 2JZ uses the same cam and crank sensors, it worked fine for me.