Jamalot

93 honda accord 243k miles. Ive been down for a few weeks now and have narrowed down(atleast i think) my problem with my crank no start condition to my fuel injectors not working. Fuel pump primes, main relay fine. Im getting spark and ive went over my timing meticulously. Could it be my cps? Does the main relay control injector pulse as well? Please help i dread the thought of taking it to a shop.

kevinhughes13

Hello so your not getting fuel to the injectors and to confirm that the fuel pump is working-priming did you open up the line at the fuel rail to make sure the pump is actually working? If so at what PSI?

I would start just by checking the cars grounds

Then there's a finned black box that I believe controls the fuel injectors on the drivers side in the engine bay on our cars check all connections and if all else fails I'm sure for the hell of it you could pick up one of those at the JY for cheap

The main relay is just for the fuel pump and the black finned box is for the injectors along with a sensor inside the distributor controls the injector pulse. The sensor that controls the pulse I will have to think of the name of it for you. I'm sure there's more I could think of but I saw your post before heading into work and figure I could help you from what I could quickly think of lol in hopes to resolve your issue

BTW there's a website just for cb7s 1990-1993 Honda Accords cb7tuner.com sign up and post there in the beginners technical for the best help

If I think of anything else I will surely post back.

What is a CPS?

I apologize for not writing more detailed information but I am heading into work now and will be able to help you a bit more after my shift ends.

Jamalot

Thank you for responding and yes I have confirmed the prime from the fuel pump at the rail. I opened that finned box up but the resisters are sealed. Is it possible for the box to be getting power but not working? I did have the hood off when it rained a few weeks ago and even though i had a decent tarp over the motor, water still got into my engine bay. But with the resisters being sealed the way they are i doubt they have water in them. ill replace the resister box and see what happens

teddy_dc2

just had the same issue as i posted a few threads below. pump was not even priming for mines. checked the relay and looked fine. for some odd reason while i was walking back outside i dropped the relay and it chipped a small part of the circuit board. i put it back in and the car started priming again only that it seemed it wasn't injecting fuel because it wouldn't start up. i even took the nut off the rail (where a pressure gauge goes) and fuel shot out. i went to autozone and bought a new one. started right up after i primed it like 6 times. took it for a drive and started it up fine the next couple of time.

it has a lifetime warranty and the guy said i could return it if it didn't work because it did look different. worth a try.

kevinhughes13

Did the car start before it rained on the engine? Lol.

Jamalot

I read your post before making mine as a refrence are you saying you replaced the pressurized nut or the main fuel relay?

Jamalot

it started a few days before as when the rain hit i had the engine apart changing head gasket and water pump. When started before it was crazy, starting at high rpms and rising then dropping to really low rpms almost bogging out then really high again

teddy_dc2

i only replaced the main relay and got it to work again. just go buy one and return it if that's not the problem.

poorman212

^Thank you for driving up the costs of parts for the rest of us who like to test/verify and then replace.

To the OP: please give detail descriptions of the issue and everything that led up to it......a simple thing like a bad connection at g101 could be your issue