kalium91
Probationary Member
- 9
- 0
- Oct 2, 2010
-
aurora,
Illinois
ok heres the deal. i have a 99 gst with a swapped built 6bolt in it and it starts and runs fine. i havent been driving it to often but iv been trying to solve this problem for a while now.
car starts and runs no problem but when i start it the afr stays at 14.7-14.8 and then steadily drops by .1 to about 12.8 then the car leans everything out because then it brings it back to 14.5 to 15.1ish but i can tell its running lean by how hot the engine gets so fast. i believe that 1 cylinder isent firing and its sending unburned gas into the exhaust making the car see a "rich" signal when its just one unburned cylinder then takes fuel away from all other cylinders(reads good. smell really rich). when i remove the injector connectors one at a time they all effect the engine equally. There is an arcing sound by the intake and i cant seam to find it. i looked in the dark for a spark with no luck. checked for a vacuum leak also and none were present. i also added an extra ground from the coil pack bracket to the firewall with no change. timing is 5 btdc
other problems it has is when im crusing at 70 after a few mins it will shutter real bad like a dead miss so i pull over and restart it and its fine till it cruises that fast again. i dont cruise that fast anymore because of that. tested my power transistor and its fine. car builds boost slowly and accelerates slowly. also when i pull each spark plug wire well running i can here it arcing so spark is getting to the plug (id assume) but i dont know how much spark is actually reaching the plug. only thing i can guess besides the arch sound(which would also be a problem) is a leaking injector thats making it run rich. i have a set of 550 low impedance rx 7 injectors that i can throw in to see if it will run right. anyone know the deadtime to set on those??
mods are a 6bolt swap with 272 hks cams and BC springs and retainers. 255 walbro. E316g. and stock injectors. ecmlink v3. more mods but dont really apply.
iv read a few other posts with the same problem but no solutions were posted. also had less detail then iv come to find with my problem.
http://www.dsmtuners.com/threads/electrical-arcing-sound-low-boost-and-rough-iddle.119764/
http://www.dsmtuners.com/threads/please-god-someone-tell-me-whats-wrong.109925/
please help if you have an idea or something i can test.
car starts and runs no problem but when i start it the afr stays at 14.7-14.8 and then steadily drops by .1 to about 12.8 then the car leans everything out because then it brings it back to 14.5 to 15.1ish but i can tell its running lean by how hot the engine gets so fast. i believe that 1 cylinder isent firing and its sending unburned gas into the exhaust making the car see a "rich" signal when its just one unburned cylinder then takes fuel away from all other cylinders(reads good. smell really rich). when i remove the injector connectors one at a time they all effect the engine equally. There is an arcing sound by the intake and i cant seam to find it. i looked in the dark for a spark with no luck. checked for a vacuum leak also and none were present. i also added an extra ground from the coil pack bracket to the firewall with no change. timing is 5 btdc
other problems it has is when im crusing at 70 after a few mins it will shutter real bad like a dead miss so i pull over and restart it and its fine till it cruises that fast again. i dont cruise that fast anymore because of that. tested my power transistor and its fine. car builds boost slowly and accelerates slowly. also when i pull each spark plug wire well running i can here it arcing so spark is getting to the plug (id assume) but i dont know how much spark is actually reaching the plug. only thing i can guess besides the arch sound(which would also be a problem) is a leaking injector thats making it run rich. i have a set of 550 low impedance rx 7 injectors that i can throw in to see if it will run right. anyone know the deadtime to set on those??
mods are a 6bolt swap with 272 hks cams and BC springs and retainers. 255 walbro. E316g. and stock injectors. ecmlink v3. more mods but dont really apply.
iv read a few other posts with the same problem but no solutions were posted. also had less detail then iv come to find with my problem.
http://www.dsmtuners.com/threads/electrical-arcing-sound-low-boost-and-rough-iddle.119764/
http://www.dsmtuners.com/threads/please-god-someone-tell-me-whats-wrong.109925/
please help if you have an idea or something i can test.