whats going on guys I have a 93 civic coupe Canadian with a built ls turbo my fuel pump wont prime my check engine light when I turn the key doesn't show on my cluser car cranks but doest start no fuel also have hondata s300 in a p28 all grounds are good valve cover thermostat and tranny ground are all good even checked the grounds under the dashboard the yellow box with bunch of grounds checked that and even relocated it along with another ground near it and still nothing

if I take a test light on ground and the light touches the green wire witht the yellow stripe and the fuel pump kicks on I am assuming the ecu isn't getting power and isn't signaling the main relay need help asap I cant figure it

 

Remove the cluster to check whether the CEL bulb was removed or is burned out. Once the CEL works, pull the CEL codes.

Next check whether:

1) Fuse 12 or 31 is blown.

2) The G101 ground is connected on the thermostat housing.

 

thermostat ground is good also the check engine light bulb is there I owned the car for 3 years the cluster was never messed with

also the ecu fuse under the hood is good and as for fuse 12 under the dash id have to check in the am

 

Is the bulb burned out?

Is the ground clean and tight?

 

ground is clean car drove 2 days ago hen it rained and now I have this issue

 

Is G101 ground clean and tight?

 

isn't g101 the thermostat ground

 

As RonJ suggests is the ground clean and tight, just eyeballing it is not good enough, disconnect/clean/reconnect, a "tight" ground does not mean a good ground. 94

 

Could be the main relay.

 

main relay has been replaced with new one from Honda and the thermostat ground has ben cleaned and tightened about 7 times

 

...and your responses to the other points in post #6 are...?

 

in post 6 you said g101 ground but im not sure what that is ist g101 the ground that is on the thermostat?

 

There's more in post 6. If you want your thread to make forward progress, carefully read through the entire thread and respond to all member's questions and comments point-by-point.

 

yes the fuses #12 and the one in my fuse box are both good

 

How do you know?

And you missed another item in post 6.

Post #2:




Other important grounds:

 

I know because I checked and even replaced them just because ive been trying to figure this out for a week now all grounds are clean even the 2 groungds under the dash near the hood latch also the check engine light bulb is fine ive one the car for 3 years and never tampered with the cluster I know the ecu isn't getting power because the ecu gives the main relay the signal to turn on and prime the fuel but its not getting the signal that's how im aware the bulb isn't blown because a week ago I was driving the car no problem

 

yes the ground on my trans is good the grounds for my headlights are good and the ground on the thermostate is clean and tight along with the ground from chassis to valve cover

 

Post pictures of the fuses 12 and 31 in the fuse boxes.

Voltage test the two installed fuses as follows:

https://honda-tech.com/honda-civic-d...fuses-3079359/

Do this:

Turn key from OFF to ON(II).

Does the CEL turn on and stay on or does it never turn on?

 

okay I cleaned and changed the grounds under the dash and now the car stats and is running just my cluster isn't working no rps nor nothing

 

There's no ground under the dash required for the fuel pump to prime or the engine to run.

 

all Idid was clean them off it was a yellow box with a bunch of grounds and a black ground loked just like the thermostat ground but now my cluster has no rpms no fuel no speed but the lights work

 

Maybe you have a security system.

During the ground wire work, you probably blew the dash fuse for the gauges.

 

When it rained the humidity increase can effect the capacitors in the ECU circuit board and cause a intermittent problem in the fuel pump priming circuit.

Common problem with Del Sols and their leaky compartment.

Real problem is it can be intermittent. Borrow a known good P28 ECU and try it.

 

that's what I did I put in chipped P28 and it started that I took it out and put my hondata back in and the car started again and its running fine now

 

okay so the car did it again so I took a page from Rons book and cleaned g101 and the fuel pump primed but I turned the key off and tried the key again and the fuel pump did nothing im going to take both my hondata and my p28 chipped and bring them inside maybe the humidity is affecting it I sanded the ground on the thermostate down and even cleaned the bolt too and it primed once tried to start it and wasn't getting fuel anymore what could this possiably be