Fuel pump no fuel to engine. car starts when spraying quick start in efi

The EFI relay also powers the engine ECU. Try a new relay.

Bad wire harness or bad pump

does it start and run for 3 seconds on test fuel

yes, engine ok, EFI bad.

no, bad engine, engine must be good to run.

EFI cant run bad engines..

so compression at spec......????



why beat the EFI to death,

all engines run on test fuel.

with gas engines, takes spark and good engine

on diesel, takes only good engine. simple huh (and some air)



for test fuel try diesel in a spray bottle into the injection port.

google this

or use youtube on test fuel on any diesel car. or truck



this is called basics....... basic basics.

1: good engine, and pumps air ok. (must breath)

2: good fuel.

3: test fuel works now. if not check above.

Possible engine coolant temp sensor or fuel pump or compression, that's where I'd be starting

Crank but no start is either no spark or no fuel to engine.
Best way to narrow it down is to just spray a 1 second dose of starting fluid into the air intake before you try to start it. If it does start then die it is lack of fuel or bad fuel to engine. In all the modern EFI cars the most likely faults on fuel failure with fuel in car are:
1. fuel pump failure.
2. fuel pump relay
3. fuel filter plug

If it fails to fire on the starting fluid it is lack of spark, and the trouble shooting procedure will be to investigate the coil pack.

Does the fuel spray out of bleeder or run out. Should spray out with a lot of pressure. Have you checked fuel filter? If its not spraying out good and not the filter i would replace the pump.

Depends on what you mean by "no start". Is it that it will crank over and not fire or will not do anything? Will it happen after driving from a cold condition(meaning, first start of the day it will fire but after driving it has issues)? How is your maintenance and what has been done recently? Please let me know.

your statement is fuel pump work ok, have you tested for proper fuel pressure. just because the fuel pump works it could have less pressure needed to start the engine. maybe the fuel filter is plugged. start out by replacing the fuel filter, if this doesn't fix it, you need to pressure test the pump. even 10 psi reduction in pressure will allow the engine not to start.

check fuel filter and fuel pump

If you need further help, I’m available over the phone at https://www.6ya.com/expert/michael_00678fd4800d19c5

Assuming it's fuel injected,check your fuses (there is a fuse for the EFI and fuel pump). If the fuse is fine, then the issue is most likely your fuel pump (located in the fuel tank). You can change the fuel regulator (located under the air cleaner unit) but it sounds like a bad fuel pump.
If it's not fuel injected, please post back for other options.
Greg