Have you tried check signal at the CPS? I would assume you are using the one that came on the JDM motor as this will not allow it to start as well and will be causing the "no spark" issue.

http://www.dsmtuners.com/forums/articles-miscellaneous/217951-how-diagnose-no-start.html

Hope this helps. Let us know if the problem continues after checking all variables.

We tested to make sure that there was a power supply to it and there is. What we did was extended the wires from the JDM sensory to the US sensor plug in because the JDM sensor is in where the timing belt housing is instead of on top of the motor like the US version.

Understandable. Try the link that I posted in the previous post and see if everything checks. Also, one thing that most do is put the CAS back on 180* out. Im sure you have checked or installed properly. Just pointing it out as it is a very common mistake.

Use the old coils you had on your engine. Was the wiring done correctly ? Make sure all harnesses are plugged in correctly. It happened to be, came out to be the coils harness wasnt plugged right .

Yeah I just looked at the link and the only thing we have to check is the position like you are saying so that will be the next step and if that is not in then I'm not sure where to go from there......thank you for the help and the link that is one to store away in the bookmarks I'll let ya know if it's turned 180 or not

No problem at all as thats why we are hear. Eager to know if you get her up and running. Keep us informed!!

Did you ever get her up and running?

Have not gotten her going yet have not had much time the past few days the only thing left to try is rotating the sensor 180 gotta lift the motor up a little to be able to reach it tho

So we have tried everything to get this to fire that we can think of except taking it to a shop and having them look at it and it still will not fire. So we have made the choice to re pull the JDM motor and put the US motor back in. Before we do this though we are going to pull the JDM internals and put them in the US motor, or so we think. Does anyone know if they are 100% interchangeable?

any reason you cant just swap the sensors over to the Jdm engine?

The location of the two sensors is in a different place. The US model is on the top left and the JDM is behind the cam and timing belt

Just to clarify, it sounds like you are getting no spark whatsoever. If I remember correctly, the crankPS determines spark. I don't have any experience with the JDM engines, but what did you mean by

"while replacing and relocating plugs and sensors so that it would work"

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?

If you are using the old coil pack, power transistor etc. I would think it has to be located elsewhere. Or something ins't plugged in.

You did check timing correct?

What year engine is it? What year is your car?

GSX_will said:

I have a '98 GSX. So I ordered the JDM 7 bolt, same exact motor that was in the car except the Japanese version.

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So you ordered a evo 3 longblock with turbo Correct?

GSX_will said:

The location of the two sensors is in a different place. The US model is on the top left and the JDM is behind the cam and timing belt

Click to expand...

Then your firing order will need to stay inverted. But if you have no spark at all and the coils are good, I would check the crank sensor and power transistor. The crank sensor should be interchangeable between your old engine and the new one.

And just to clarify, other than some minor differences in manifold design, injector sizing, and turbo size, the JDM engine and US engine are exactly the same. Swapping the internals of your JDM engine into the US block would be pointless since your issue is obviously from an external part and the JDM parts are no better.

We had tried to invert the plugs and still received nothing the only thing we have not check would be the crank sensor other than that every other solution has been tried with the same end result of no spark the reason if thought about taking the internals out of the JDM and putting them into the US is because the US one ran before we took it out there was just a knock coming from it so I figure replace the bad parts with good ones and put the original motor and sensor set up back in . I'm not 100% sure on the year of the motor I just know it is a 2G motor and the car is a 98'. I don't believe it is the Evo 3 motor it is just a replacement 4G63 turbo, my buddy has an idea on what it might have came out of but I can't remember what he said. I am going to check the timing here in the next few days when I can have someone else here to help check while I crank the key to spin the cams.

You could try a 1g CAS.

So I know I'm really bad at this forum thing and posting to it Im trying to get better at. So to start off I thank all of you for your input and support with this issue. Secondly I had a buddy come by today and we finally got it to spark. He had a test light and after some trial and error we narrowed it down to three things, the crank sensor, the crank gear or the relay in the car. What he did was took the test light and grounded out the plug for the crank sensor making it send a signal which in turn finally got a spark. We are one step closer now. The next steps will be to order those parts and replace them one by one first I'm getting the relay then the sensor then the gear. The reason I'm getting the gear is because I thought the American gear had a "trigger" in them to signal the ecu to fire if this is not correct please let me know so I don't go out and buy one. Once again thanks for the help now and in the future if I still need it

Can you post some pics of your cam angle sensor? Is it on the passenger side or in the cam gear on the drivers side? There are 2 different sensors and it sounds like you are getting them mixed up. The 2g cam angle sensor will either be on the passenger side of the intake cam or on the drivers side behind the cam gear. You also have the crank angle sensor which is under the timing cover. You will need both the cam and crank angle sensors hooked up for it to start, or you will need a 1g cam angle sensor which combines both cam and crank angle sensor into one sensor that goes on the passenger side of the intake cam.