Boom and car died, won't start

[12's]

When trying to tune today, at WOT, the car went boom and killed on me. The rpm guage doesn't work on the safc or the guage cluster. The car will crank but does not spark. The T-belt is fine also unless it skipped. It is a 2g gst and it seemed like the car was cutting in and out a littler bit. The rest of the SAFC has power. I reconnected one wire that needed to be fixed for the power, But I didn't have any time to check anymore. Could this be caused by the SAFC connection that goes to the computer coming out? Would this cause it not to start?
Thanks

 

[karbon]

I don't, know for sure, but I can rule out that it's not your AFC. My car starts fine with the AFC harness unplugged. It's like unplugging your MAS. The car idles fine but will break up horribly after a couple thousand RPMs give or take a few.

 

[12's]

installed 90 cas, new coil, new power transistor, and another ecu and it still has no spark. Any ideas?

 

[wishful_laser]

i got the same problem with my car but i pulled out the plugs and you can feel gas on the end of them. everything else is fine. the timing,fuel,spark, and i cant get a compression test done cause i heard your car is suppose to be at operating temp. let me know you fixed it

 

[talon90]

hey i think i might have the same exact problem i was driving one day and then my car just killed i check for gas there is gas and it still turns over but does not start i think it sounds like it could be spark in mine too so does anyone have an answer to this problem thanks
~david~

 

[12's]

i got the same problem with my car but i pulled out the plugs and you can feel gas on the end of them. everything else is fine. the timing,fuel,spark, and i cant get a compression test done cause i heard your car is suppose to be at operating temp. let me know you fixed it

You can do a compression test if the car isn't hot, but the numbers won't be as accurate. They will read a little higher. To test for spark, pull a plug wire out and have it sit on the valve cover. Have a friend turn the key and see if you can see spark.
Some people stick their finger on the end of the wire while being turned over and it shocks them if it has spark. I wouldn't do that though.

I am guessing you both have a diferent problem than me. I was driving and the car didn't kill. It sounded like it killed but when I was down shifting to get into a lot, I could hear the exhaust sound just like as if it was running fine. The rpm guage stopped when it happened and it wouldn't start after. I can figure out the problem...

 

[12's]

I put in another working ecu and found that the cas was getting power. The car still gets no spark Any other reasons it won't get spark? I did power transistor, ecu, cas and coil and still no spark.

 

[wishful_laser]

well i did a record time in pulling my head off today. i did it in 2 hours. my vavles are not bent but they do look like they have been really hot(that golden brown color) and the top of my pistons are a dark black. im hoping i can put it all back together since all the gas it out of it now and maybe get lucky and start. i also figured out they my coil pack may be bad. the guys at autozone told me that it is still good but the resistence between the 4-1 coils are different than the 2-3 coils. the haynes manual said they are suppose to be the same. and my harness is measuring a little high. the specs say its suppose to be between .77-.95 it was at 1.15.i am going to replace the coil and get some new wires cause mine got toasted ends where the plug into the coil.

 

[Logue]

where did you get the power transistor? i would say that could def. be it. mine unplugged while i was tuning same thing happened.

 

[12's]

The power transistor looks like a 2g mas plug on top of the motor on the 2g's. I had spark issues and decided to swap a 1g head on, 1g intake mani and TB, 1g cas (wired according to magnus), power transistor and put dsmlink on it. I know it is not the ecu because I swapped in 2 others that are good to check. I am not sure why I am not getting spark though. I will have to have someone else fix it.

 

[12's]

well i did a record time in pulling my head off today. i did it in 2 hours. my vavles are not bent but they do look like they have been really hot(that golden brown color) and the top of my pistons are a dark black. im hoping i can put it all back together since all the gas it out of it now and maybe get lucky and start. i also figured out they my coil pack may be bad. the guys at autozone told me that it is still good but the resistence between the 4-1 coils are different than the 2-3 coils. the haynes manual said they are suppose to be the same. and my harness is measuring a little high. the specs say its suppose to be between .77-.95 it was at 1.15.i am going to replace the coil and get some new wires cause mine got toasted ends where the plug into the coil.

The brownness on the head is fine. It is usually like that on the exhause side. The black is carbon and is common also. If the main reason for pulling the head was to get the stuff out of the cylinders, you could have used a shop vac with duct tape on it making it conect to a piece of hose and that wold have got it out.

 

[Logue]

The power transistor looks like a 2g mas plug on top of the motor on the 2g's. I had spark issues and decided to swap a 1g head on, 1g intake mani and TB, 1g cas (wired according to magnus), power transistor and put dsmlink on it. I know it is not the ecu because I swapped in 2 others that are good to check. I am not sure why I am not getting spark though. I will have to have someone else fix it.

Wait. I don't understand. So you had spark issues stock and before figuring out what was wrong you decided to swap a 1st gen head hoping maybe you could fix it that way?? I know where the PT is but where did you get another one to replace the one in question?

 

[WhiteTsiAwd]

Check your MPI fuse. It controls the whole spark issue. Had mine blow on me and coudlnt figure it out for a month or so. Its as easy as replacing a fuse, if thats the problem.

 

[12's]

I put a ported 1g head on for performance reasons and I also wanted to put in arp's and a new hg anyways. I noticed the cam sensor didn't get power before so I was told to replace it and the only way to do it was to redo timing anyhow so I decided to do a little more work. I had the parts sitting around anyways. The head was going on my 2g awd and the others were from cars we parted out.

 

[12's]

It is on a 2g and I don't think 2gs have MPI fuses. MPI fuses control fuel not spark anyhow