Ok, so i was driving to work this morningin my bolt-on evo IX, and did a 2nd gear pull, just trying to check the afrs and make everything is running good (i rarely drive the car on the street anymore). At around 6500 rpm at WOT, the car just suddenly cuts off and dies. I coast over to the side of the road, try cranking it......just cranks and cranks, wont start. Pop the hood, no leaks, no smoke, no leaks inder the car....never heard a boom or anything to tell me i blew something. The afrs looked good during the wot run, holding 10.9-11.2 (i run it rich for road racing), made good boost, was running great this morning.
I dont know if i am throwing any codes, since i cant get the car to stay on

Any ideas? Please help.....my wife has the armada today, so i have no way to tow this thing home from work, so i need to try to fix it if i can.


Thanks,
Matt

 

Start simple

Did a IC pipe blow off?
check fuses?

 

Pull the upper timing cover and at least make sure the timing belt is spinning and something didn't let go in the timing as well. I just had this happen to me, my tb auto tensioner went out, needless to say, belt came off (greddy kevlar belt), and ended up bending some valves up top.

 

see if you can hear your fuel pump turn on when you put the key in. And reset the ecu via battery disconnect if you haven't.

 

Intercooler pipes did not blow off, I tugged on them and they felt good. Will check them better here in a few minutes. I havent checked fuses yet....ill start there. Just replaced the fuel pump with a dw300 before my last track day, and it did great, and has been running very well ever since. I will check to make sure it is priming. The timing belt and tensioner was just done about 20k miles ago, so they should be good, but i will keep that on the list of things to check. Also about to crank motor with plug wire puilled and check for spark.

 

Check the CAS that goes on top of the valve cover and down and around into the timing case. I've seen a few time's the CAS wire get cut through from the belt and it would instantly kill the car.

 

Cam angle sensor (CAS) went bad maybe. Simple and cheap $60 fix if it did go bad.

 

This happens to me ALOT, lol. I am betting an IC pipe is blown off a coupler. Check EVERY single coupler connection, even the ones under the car for the LICP.

 

Update: Checked for fuel, i am getting fuel to the rail. Pulled a spark plug out and put it in the boot to ground, and cranked....not getting any spark. No fuses underhood are blown. So it appears it is something that would cut the spark to all four plugs, since it instantly died, not just ran on three cylinders or something. Maybe a crank sensor, cam sensor, or possibly the ignitor chip/coil? Seems like something electrical.

 

My bet is on Crank Angle Sensor. Let's get a pool going!
Good luck man!.

 

Again, as I said above
CAS will not let the motor spark. you need to pull the cover's off and check for wires being cut or the sensor all together.

 

What are the chances of wires actually being cut? Is there something underneath there that can easily cut the wires. Usually it's the exposure to heat that make them go bad.

 

I know you said all four plugs weren't firing due to the car dying and you checked one plug. I had this happen to a neighbors car last week and 2 plugs weren't firing and 2 were, due to wasted spark system. So check the other coil too. If one coil goes out, then it affects two spark plugs.

Also, check the CAS like others have said, especially if both coils aren't firing.

 

Hmm, good point. I will try one of the plugs from the other coil pack and see if it is getting spark. I guess i just assumed that all 4 were not getting spark because of the way that it just died. I would think it would still run, albeit misfire like crazy if it were just one or two cylinders not getting spark.

 

Agrees, that is my next step.....however on the side of the road with limited tools, i was checking easy stuff first. Will the Crank sensor prevent the injectors from firing as well? Because when i had the spark plug out, it was bone dry, and there was no fuel smell. I do know that i have fuel to the rail though.