No spark. Wiseman please help

[Nautica985]

My CAS went up and none of the cylinders were getting spark. I put in a new CAS and now I only have spark in cylinders #2 and 3. I tested the coil and its good, I also replaced the power transistor and ecu(which might not be working because the caps are leaking) and i have the same problem. I tested the wire at the power transistor for cylinder 2 and 3 and it is not pulsing. The wire for 1 and 4 is pulsing.

I talked to a guy at Mutsubishi and he said it is very rare for the ignition circuits in the ecu to fail. Thats why I dont think its a problem with the ecu because what are the chances of both ecu's having the exact problem. The only other thing I think it could be is that there is a short in the wire for #2 and 3 that goes from the power transistor to the ecu. How would i test to see if there is a short?

Please help

 

[Staytuned]

On the cam trigger there should be a paint mark to point out where the trigger should be oriented with the sensor. Make sure you don't have this back wards. The paint mark should be closest to the CAS.

 

[WhiteTsiAwd]

It is not a short. If you installed the CAS right then the problem will be your MPI fuse. On your positive battery cable there should be a group of 3 fuses. The one closest to the driver side(i think) will be your MPI fuse. It is mroe then likely bad. Replace it and you should be rolling. If not then post back and we can go from there. Good luck.

 

[Nautica985]

The fuse is good; it was one of the first things I checked. If it was bad, I wouldn’t have spark or fuel in any cylinders. The CAS can only be installed 2 ways and I have tried both. I’m pretty the sure CAS only sees #1 cylinder TDC so it wouldn’t affect cylinder 2 and 3 unless it wasn’t seeing #1 and in that case I wouldn’t have spark in any cylinders.

At this point I think it almost has to be the ECU. I tired another one but the caps leaked onto the board and im not sure if it works anymore. I dont think the chances of both ECUs having the same problem are very high though.

I have a alarm with remote start, it’s hooked into one of the ignition wires. Do you think it could cause a problem?

 

[WhiteTsiAwd]

Oh well hmmm. I dont think the alarm would cause it. It very well could be the ECU. I still dont think there is a short in any of the wires. Thats very rare. Try pm'ing a guy named Steve on here, hes a ecu genius and hes really nice. He might be able to help. I sent him my ecu and he fixed it in a day and had it back 2 days later.

 

[Nautica985]

I just put in a new ECU rebuilt by cardone and i still have the same problem . Can anyone confirm that the CAS only sees cylinder 1. This is what I was told but I have a hard time believing it now because I have replaced everything else that would cause it not to spark. The CAS has 4 wires going to it so i would think if it only sees cylinder 1 it wouldn’t need 4 wires.

 

[Lof8]

I'm having a similar problem with cyl 2 & 3 intermittently not getting spark. I've replaced the plugs, wires, coil, and it has a newly rebuilt ecu. I need help.

 

[Nautica985]

I finally figured it out. It was the CAS. The first one i put in was half bad and only firing on 2 cylinders. I got the new CAS off of a 93 hyundia, its the same as the 90 CAS except for the connector.

Lof8, test your power transistor. If its good then your CAS is bad.

 

[Lof8]

I've tested a couple transistors in its place and the problem is still there. Looks like a CAS is my next step. Thanks for the help!

 

[dsmpower1]

hey i have a very similar problem to what you guys are talking about. I did the 6 bolt swap so my problem may be a little more difficult. I have no spark in any cylinder. I turned CAS manually when ignition is in ON position and i can here it clicking and when i do this the fuel pump also kicks on. So i am assuming the CAS is working. How do i test the power transistor to see if its good? Could the MPI be the cause of this problem? I am going to swap out coil pack also just to check to make sure it is not that. THank you , any help on this would be greatly appreciated. Please help me get my car started its been down since sept. 04.

 

[Nautica985]

If your injectors are firing then your CAS is most likely good. While cranking the engine, use a test light on the wires that go to the coil. 2 of the wires should be pulsing. If they are not pulsing then either your power transistor, ECU, or CAS is bad. If they are pulsing, your coil is bad.

Look in a Haynes or Chiltons book to see how to test the power transistor.

Also double check your ignition fuse.

 

[dsmpower1]

hey i checked my power transistor and i found out it was bad just to make sure it is though i am going to take it up tomorrow to the local mitsu dealer to have them check it. I already ordered one from parts store , so it should be here sat. Hope that was the cause of my problem......ehhh i have so many unhooked wire connections. is that normal when doing the 6bolt swap i also removed a/c

 

[jay_rod24]

DSM - Just wondered if you got ur problem figured out. Was curious to know because I have had the same problem and was needing some ideas.

 

[Lof8]

just put in a new (used) CAS and same crap. I guess its possible the CAS is a bad one, but this is getting really annoying. Could it be possible that the rev limiter is malfunctioning on my keydiver chip?

 

[17psiGST]

I have the same problem now too... cylenders 1& 4 no spark... coil is good and power transistor tested bad. I was wondering how much those transistors go for & i can only get them from a dealer?

 

[jay_rod24]

I have the same problem now too... cylenders 1& 4 no spark... coil is good and power transistor tested bad. I was wondering how much those transistors go for & i can only get them from a dealer?

How exactly did you check your transistor? It WILL test bad if the CAM sensor is bad because: The cam sensor sends signal to the computer, which in turn triggers the drivers to the power transistor. The drivers in the power transistor fire the coils. So if you are not getting the proper signal from the cam sensor, you have no drivers. You need to check your cam for signal voltage. ( I think it's a blue wire? Well there are 3 wires, so whichever one is not black or red).

A power transistor will run you about $100 from a parts store. I purchased the CAS from the dealership for $60. Get a wiring diagram and do some testing before you waste money on unnecessary parts. Also, if you have access to a scanner see if you got any codes. PO340 is CAS. Lemme know what ya find!

Shauna

 

[Nt-Eclipse-Dail]

Add me to the list of guys that 'Got No Spark' from their 2.0l engine...

I am following this thread and learning all the while...

I am also calling the dealer today to check on getting a CAS from them (60 bucks is rediculous cheap for a new CAS)... The Auto Parts Place wanted $370.00 for a CAS for my 90 model NT... I nearly crapped when they gave me the price. I prefer to stay away from junkyard parts if possible as I am fixing this car up for my wife's daily rider... Thanks for the tips and help guys... I appreciate you!

James