Been reported in Wisconsin that over 3,500 gas stations have water in the gas. While other states are complaining about droughts, won't quit raining here. Sure had a major downpour yesterday.
Many of our airports had to switch to above ground tanks, put a huge fence around them with huge NO SMOKING signs, but gather its okay to use an acetylene torch.
When fuel injection came around, first tool I had to buy was one like this.
A good fuel pressure tester, water in the gas is an age old problem, in older vehicles used a glass bowl in the fuel line so you can see the water in that bowl, even had a drain on it, got rid of this, but not the problem.
With the fuel pump test with that clear hose, well I use a two quart Manson jar, hot wire the fuel pump, press on that release valve so you quickly learn if you have water in your gas. This really causes misfires and all the new spark plugs won't cure this. Yeah, I use a funnel and pour the good fuel back into the tank.
Another problem with ethanol is getting a bad mix with nothing but super low octane gas left, but doesn't cause misfires, but sure causes detonation, new problems we never had before.
When I run across crap like this, file a complaint with my credit card company, usually get a full refund, but still have the problem, could run the tank dry and pour in only the top using five gallon cans. But toss in a can of Seafoam that helps, and burn that crap out of it.
But letting the tank settle and using the fuel pump tester, water is heavier than gas, so with hot wiring the fuel pump, can get most of it out. Fuel pickup is at the bottom of the tank. Not saying this is your problem but could well be.
Still old school with engines, fuel, compression, ignition, ignition and valve timing, sure running into a bunch of idiots lately, no your brake pedal isn't low, ain't getting a code, what AH's for lack of a better word. But do need a scanner because don't know if I get a check engine light if its a loose gap cap or a failed EGR that can burn up the engine. Cruze ain't got an EGR, this is good.
Checking crankcase vacuum is new to me, never was done before, but is now. Use a rubber cone in the dipstick with my vacuum gauge. Should show around 18"/Hg at idle. Finding leaks is not new either, compressed air sure helps with leak down tests. Spraying with starter fluid is a great way to get burnt alive.
Think the word is common sense.