01 Suburban K1500
5.3
262k miles
18 degrees F
Trucks runs great but the last 2 mornings it won't start. After it warms up it will start and run fine.
During the no start condition, it has 55 psi fuel pressure, strong battery that turns engine over fast, but does not have spark. To check spark I pulled a plug wire off plug and connected a new plug and grounded the plug threads to the engine block. After about 5 tries it showed spark and immediately started. I shut it off and immediately tried again and had no spark again. I had to go to work so that's all the testing I was able to do.
I have an idea of where to start troubleshooting, but wanted to hear some suggestions from you guys.
5.3
262k miles
18 degrees F
Trucks runs great but the last 2 mornings it won't start. After it warms up it will start and run fine.
During the no start condition, it has 55 psi fuel pressure, strong battery that turns engine over fast, but does not have spark. To check spark I pulled a plug wire off plug and connected a new plug and grounded the plug threads to the engine block. After about 5 tries it showed spark and immediately started. I shut it off and immediately tried again and had no spark again. I had to go to work so that's all the testing I was able to do.
I have an idea of where to start troubleshooting, but wanted to hear some suggestions from you guys.