I need to locate the fuel pump on my 88 Honda Prelude Si. 2.0

U need to re-timed the engine. Check all four marks going across the two cam pully is lined up with the engine head surface.
Then check the crank pully alignment mark the single notche align to the mark on the timing cover

fuse, ignition or relay or even fuel filter

Not a single person answered your question, they all told you an answer that didn't relate to your question. Anyways the relays for your fuel pump are under your dash behind the fuse box.

in the fuel tank

the fuel inertia switch should be located on drivers side of the trunk. there will be hole in the liner the relay is located behind it

Low retail valve $1950.00
Average clean and in good condition $3100.00
High retail valve $4375.00
Hope this was very helpful

there are two locations one is inside the fuel tank and the other is beside the fuel tank before the fuel filter

You need to check the tcm for codes too. The s3 light is like the check engine light for the tcm. The VSS code might be your problem.

I have had problems with my 89 prelude. I found that the problem wasn't with the fuel pump, rather the master relay. You will have voltage at the fuel pump with the fuel pump dicconnected, but when you connect the pump and put a electrical load on the circuit, the voltage drops. check current with the pump running and see if this is the case.

if they both are the 2.0L they are the sme thing.