losing spark

[klipz gsx]

Hi, I just did a engine rebuild on my gvr4. The car ran good for about 10mins then i loss spark @#2and#3 cylinders. I also swap out a coil(used) and it did the same thing ran for 10 mins then loss spark again @#2and#3. Any ideas on what causing this?

 

[JCMDSM]

Check the PTM. It is located right below the fuel pressure regulator. It is responsible for controlling firing order.

 

[dsmsucks]

Hi, I just did a engine rebuild on my gvr4. The car ran good for about 10mins then i loss spark @#2and#3 cylinders. I also swap out a coil(used) and it did the same thing ran for 10 mins then loss spark again @#2and#3. Any ideas on what causing this?

Could be a ecu problem

 

[ImportModder]

When you say you're losing spark, are you checking the plugs for spark or the wires?

 

[Talesin]

Also check your CAS. I had a similar problem, and it turned out that the CAS was bad. Admittedly, mine was the reverse; lost spark on two cylinders on start, but would run fine until it was shut down again if all four fired even once.

 

[SleeperG]

try swapping in a different transistor pack