LS1 motor misfiring/idling rough (coil pack/lifter?)
#1
TECH Regular
Thread Starter
LS1 motor misfiring/idling rough (coil pack/lifter?)
Driving home last night the car was running fine.
Then when i took off from a light it started to sound as if it was missing badly and started to shudder then just died.
I had it towed home to not risk further damage. It still can start up but idles pretty rough then dies.
I have a mild cam (222/226 115 lsa) and valve train over haul with dual springs done about a year ago. Still running stock injectors.
Did plugs about 3 months ago.
Any clue what it could be?
Coil pack?
Injectors maxed out?
Something more serious?
Then when i took off from a light it started to sound as if it was missing badly and started to shudder then just died.
I had it towed home to not risk further damage. It still can start up but idles pretty rough then dies.
I have a mild cam (222/226 115 lsa) and valve train over haul with dual springs done about a year ago. Still running stock injectors.
Did plugs about 3 months ago.
Any clue what it could be?
Coil pack?
Injectors maxed out?
Something more serious?
#4
TECH Regular
Thread Starter
#7
Trending Topics
#8
TECH Regular
Thread Starter
I'm gonna pull the plugs tomorrow and check for anything foul.
Used a tester and the injectors are functioning fine, so I'm thinking it's gotta be a plug.
#10
TECH Regular
Thread Starter
Pulled the valve cover today after checking the plugs, plugs were okay...
But it in fact was a broken valve spring.
I had PRC Duals 1500's I believe. I thought the would have lasted more than 20k on such a mild cam.
My mechanic was telling me that he has seen far less broken springs on Patriot springs.
Oh well, it is good insurance to have dual springs no matter how mild of a cam, I'm glad a I did.
But it in fact was a broken valve spring.
I had PRC Duals 1500's I believe. I thought the would have lasted more than 20k on such a mild cam.
My mechanic was telling me that he has seen far less broken springs on Patriot springs.
Oh well, it is good insurance to have dual springs no matter how mild of a cam, I'm glad a I did.
#11
What installed height did you measure back when they were put in?