Good day everyone,
I'm having a fuel issue with my AP1, here's the backstory: I hit a dip on the freeway and the car smacked the ground/floor (the car is really low, this is how I bought it), After hitting the dip I drove for a about a minute or so and the car stalled and died on me and I couldn't get it to start. I had the car towed home, after I had it unloaded at home I noticed that the fuel pump wasn't priming (I wasn't able to notice this when I was stuck on the freeway due to the noise from traffic). The car is boosted with a gt3271 turbo on 7lbs and runs on e85 with a walboro 255 fuel pump and AEM v1 ecm but I've never had a single issue with the car. I checked the fuel pump and fuel pump fuse (in the footwell) and they're both working as they should, but pump wont prime. MY BEST GUESS is that after I hit the dip, this triggered some kind of impact/accident/collision sensor and shut off the fuel pump and the car stalled and died because it ran on the fuel left in the fuel lines, just my guess. I tried looking for an inertia switch but I found out that the usdm s2000 are not equipped with an inertia switch. Now this is where I'm stuck, has anyone had/have similar issues or does anyone know or have any ideas of what I can do to fix this issue?

ANY HELP IS GREATLY APRECIATED

 

Your not going to like my best guess. I believe you may have knocked the pickup screen/tube assembly off of your Walbro or unseated the pump to where it can't pick up the fuel.

 

Pump should run even though the pickup screen is off.
If there is an inertia switch it should be located close to the ecu above the hood latch.
Might be worth looking, I've read some conflicting info about it's presence.

 

Sorry, I understood it to be running but would not prime.

 

I just checked and no luck, don't see an inertia switch

 

 

Impact switches were not installed till 06 and they're located behind the headlights. They are for airbag deployment. Is your fuel pump running and won't prime or not running at all?

 

Wow, learned something new! You seem to be correct. I assumed my AP1 had more impact sensors (in addition to the one behind the radio/dash) on the front frame rail (like my 2003 Accord), but apparently not!

Also, if it was your impact sensor or a problem with the SRS unit, your airbag light should be on because I assume the Honda systems are self-testing whenever you insert the key in the ignition.

 

perhaps a fuel line cracked or has a hole in it from the impact or dragging on the roadway, allowing air into the system. I'd get it on a lift and follow the fuel lines under the car. It could even be at the top of the fuel tank, out of the fuel pump access hole, so you need to check all of the lines. Much like a pool pump that doesn't prime, almost always due to air in the system.

 

Since the fuel pump doesn't seem to run I would start there.
Remove the fuel pump access hole from inside the trunk area and unclip the connector and measure the voltage on the thicker cables (I think it's yellow and a black one).
You need to do this while someone else is cycling the key on/off.