Hard to start when gauge is around 1/4 of a tank
#1
08-04-2018, 10:57 AM
Join Date: Nov 2015
Location: St. Pete
Age: 60
Posts: 608
Rep Power: 34 
Hard to start when gauge is around 1/4 of a tank
First try car will try to start and then cough and die and only when the tank is a 1/4 full or less. Will almost always start the second time. First I thought poor quality gas, so I stopped going to Shell and started going to Chevron or BP, but no difference.
Does it sound like water in the tank?
Does it sound like water in the tank?
#2
08-04-2018, 11:50 AM
First try car will try to start and then cough and die and only when the tank is a 1/4 full or less. Will almost always start the second time. First I thought poor quality gas, so I stopped going to Shell and started going to Chevron or BP, but no difference.
Does it sound like water in the tank?
Does it sound like water in the tank?
#3
08-04-2018, 12:02 PM
You're losing prime on one or both pumps. Try several on off key cycles to build pressure before starting. It may not be the fuel level it maybe temp related meaning less fuel = higher temp. Check valves in fuel pumps will bleed off, sometimes at a quick rate (seconds) do you have a scan tool to check PIDs for fuel pressure?
#4
08-04-2018, 05:34 PM
Suggest not having fuel go lower than 1/4 tank. The fuel cools the fuel pumps and to constantly run low, the pumps will be overheated and damaged. It could also be if you ran stale fuel in the past.
#5
08-05-2018, 01:30 AM
Sounds like it could be evaporative emissions control valving to me. The whole tank and pipe work are setup to avoid letting fumes escape into the atmosphere. This makes it a sealed system.
So, to avoid a vacuum as you use gas, the valving allows air in and fumes to vent through the engine.
You could have a faulty valve, blocked carbon filter, even a faulty gas cap.
Too many bits to diagnose and tell for sure on here.
http://dannysengineportal.com/evapor...ontrol-system/
https://www.redpants.lol/blog/2015/1...alling-problem
So, to avoid a vacuum as you use gas, the valving allows air in and fumes to vent through the engine.
You could have a faulty valve, blocked carbon filter, even a faulty gas cap.
Too many bits to diagnose and tell for sure on here.
http://dannysengineportal.com/evapor...ontrol-system/
https://www.redpants.lol/blog/2015/1...alling-problem
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