skazat
10-10-2011, 08:28 PM
Hey guys I need some help troubleshooting an issue with my RB25.
Long story short my RB25 wont fire up, it cranks but doesnt actually fire up. Its getting fuel but I dont think its getting spark. If you want more info read the info below.
Let me give you some background first. Ive been working on this car for a bit now but ever since school has started my progress has come to a stand still. Its a pretty much stock RB25 swapped into a s14. Its running on an AEM EMS and has been converted to speed density (I got rid of the maf and went with MAP and IAT sensors). I had it running before and it would always fire right up, the reason I havent driven it is because I still need to tune it but havent had the time with school having a hold on my balls.
The last thing I did to the car was pull the passenger side valve cover off to weld a bung for an evac set up. I went to turn it on the other day to move it and it wont fire up. It will sit there and crank but wont fire. I checked for fuel and its got pressure and everything, I hooked up a timing light to a spark plug wire i have in between the coil and plug that I used for setting base timing (I left it in there so I can use it as a pick up point when I dyno it) and its not lighting the timing light which leads me to believe its not getting spark.
It was raining the last day I was out where the car was so I could diagnose past that. My next step is to hook up my laptop to the EMS and see what the Stat Sync is saying to at least make sure the CAS is reading. Other than that I dont know what else might have caused this issue.
I just cant believe after the motor sitting on a bench for almost a year and then firing up and running fine everytime i fired it up for a month and now its got an issue. Sorry for the essay but thanks if you read all this.
Long story short my RB25 wont fire up, it cranks but doesnt actually fire up. Its getting fuel but I dont think its getting spark. If you want more info read the info below.
Let me give you some background first. Ive been working on this car for a bit now but ever since school has started my progress has come to a stand still. Its a pretty much stock RB25 swapped into a s14. Its running on an AEM EMS and has been converted to speed density (I got rid of the maf and went with MAP and IAT sensors). I had it running before and it would always fire right up, the reason I havent driven it is because I still need to tune it but havent had the time with school having a hold on my balls.
The last thing I did to the car was pull the passenger side valve cover off to weld a bung for an evac set up. I went to turn it on the other day to move it and it wont fire up. It will sit there and crank but wont fire. I checked for fuel and its got pressure and everything, I hooked up a timing light to a spark plug wire i have in between the coil and plug that I used for setting base timing (I left it in there so I can use it as a pick up point when I dyno it) and its not lighting the timing light which leads me to believe its not getting spark.
It was raining the last day I was out where the car was so I could diagnose past that. My next step is to hook up my laptop to the EMS and see what the Stat Sync is saying to at least make sure the CAS is reading. Other than that I dont know what else might have caused this issue.
I just cant believe after the motor sitting on a bench for almost a year and then firing up and running fine everytime i fired it up for a month and now its got an issue. Sorry for the essay but thanks if you read all this.