TSX 2005 having intermittent starting issues. When I crank the starter I have had to crank it up to 4 times to get the engine running. It seem random. I once started the car without issue and turned it off then back on in two minutes and I would have crank it many times. The worst part is when I take it to the shop they tell me it could not reproduce the issue. I had the battery and alternator checked out and they are good. I my thought is it could be the fuel pump? I dont want to start replacing things at random.

 

Possibly the reef valve in the pump (non-serviceable) not maintaining the pressure in the line after shut off or leak after the pump somewhere. Best way to diagnose is to attach a fuel pressure gauge, start car and allow to run for a few minutes. Shut off and observe the fuel pressure for pressure loss. if no leaks found, replace pump.

 

Do you know what the pressure should be?

 

Checking fuel pressure requires an expensive test kit to fit a test gauge to the system. Most shops will have the equipment.

An indirect pressure test can be performed by turning keyswitch to on, pause 3 secs, and then Off. Repeat twice and try starting. If starting is good, then intermittent hard start is fault of leaking check valve in fuel pump. Fix is a new fuel pump.

good luck