klittle1417
OBS Enthusiast
- Joined
- Dec 7, 2014
- Messages
- 58
- Reaction score
- 3
I know, another Vortec that wont start. I have searched and searched but can't seem to figure just what my issue is. So I will post a tale my woes in hopes someone may have some insight.
I have a 97 K1500 ECSB 5.7 with about 230k miles. I bought it 4.5 years ago with 205k on it. Mostly has run great since I've had it but had developed issues now. After sitting for a short while, sometimes 4 hours and sometimes 4 days, it will crank but won't start. Other times it will crank and start hard. Once it starts it runs fine. It runs strong and smooth. It currently is on plow duty as I got a new truck. I don't enjoy shoveling when it won't start.
It has new distributor cap and rotor and I just replaced the coil too. Plugs and wires have about 20k on them and appear to be in great shape.
I have checked fuel pressure and it is at 60psi. When I shut the key off it holds pressure for greater than an hour. I first thought it was leaking down and would flood the truck as it acts like it is flooded when it won't start.
I have a scan tool app Torque Pro and can seem some sensors. Coolant temp sensor seems to be working right, MAP seems to be good.
Part of me says it has to be fuel related but when it runs there is no hesitation to indicate it is starving for fuel. Could the fuel pressure regulator be feeding too much fuel?
I really don't know what to replace or check next. I am not a big fan of just tossing parts in it and hope it works.
Anyone have suggestions as to where to go from here?
Kevin
I have a 97 K1500 ECSB 5.7 with about 230k miles. I bought it 4.5 years ago with 205k on it. Mostly has run great since I've had it but had developed issues now. After sitting for a short while, sometimes 4 hours and sometimes 4 days, it will crank but won't start. Other times it will crank and start hard. Once it starts it runs fine. It runs strong and smooth. It currently is on plow duty as I got a new truck. I don't enjoy shoveling when it won't start.
It has new distributor cap and rotor and I just replaced the coil too. Plugs and wires have about 20k on them and appear to be in great shape.
I have checked fuel pressure and it is at 60psi. When I shut the key off it holds pressure for greater than an hour. I first thought it was leaking down and would flood the truck as it acts like it is flooded when it won't start.
I have a scan tool app Torque Pro and can seem some sensors. Coolant temp sensor seems to be working right, MAP seems to be good.
Part of me says it has to be fuel related but when it runs there is no hesitation to indicate it is starving for fuel. Could the fuel pressure regulator be feeding too much fuel?
I really don't know what to replace or check next. I am not a big fan of just tossing parts in it and hope it works.
Anyone have suggestions as to where to go from here?
Kevin