There seem to be too many coincidences here, relay does not work and the fuel pump is not delivering fuel when the relay is manually closed.
Too many for my liking.
Is there any power at the relay contacts?

 

Hundreds going by the number of relays I've gone through. No official count.

 

I've thought about that, an wondered if maybe you had marked them someway to see if they come back...

 

A few have come back. Always because another relay has failed. Thinking about offering to replace all but the horn relay (it ALWAYS looks good) for an additional fee.

Still wondering what's going on with this particular No Start issue.

Keep us informed Bulldog.

 

Have you considered sourcing a heavier relay for the air pump ?

 

Best option I know of! First-hand experience!! But I did buy a spare RCM from Standard Products and keep it around if and/or whenever the RCM-issue pops up again. Just like I keep a spare CPS around.

 

Is there power at the contacts? If so the fuel pump is shot or has a problem.

 

OR
empty tank
clogged filter
broken line ( but I think you'd notice the fuel on the floor )
broken wire to the pump

 

Naw.
None have come back for another bad air pump relay.
They come in for the air pump relay repair. Get sent back and then year(s) later another relay will fail.
I've noticed the traction, fuel and engine control relays get discolored from heat from use.
Thinking about offering to replace all the relays (-horn. It always looks good) for $50. Should eliminate the RCM as a problem after that.

 

Right but have you ever manually pushed the relay just for a test? Same with the air pump relay, ever manually push the contacts to see if the air pump works?

 

I have never manually closed the fuel relay, as I have never had one that didn't engage when the switch was turned on, but I HAVE manually closed the air relay, and the pump did run .

 

would it be possible then my fuel relay went bad in the rcm u repaired for me?

 

OP, I am having the exact same problem. Went to start the car one morning and it would just turn over and over but would not start. After a few attempts, it would start. Later, it would just turn over and over again and not start. I got it to start once and it ran for about 20 seconds then dies. Then it would just turn over and over again but would not start.

One thing I do notice, is that normally, as you turn the key to on before starting the car, you would hear a sound (I assume a fuel pump) sound. But in the times it would not start, I do not hear this sound. Everytime I try to start, if I hear the pump sound before starting, then the car would start, otherwise it will n ot start and the engine just turns over and over again.

Its a 2007 limited roadster and only has 25k miles on it.

Does this sound like the RCM board issue that is discussed here?

 

Connecting a good gauge on the fuel rail Schrader is easy. need about 40 psi to start. "Cranks but does not start" is a common issue and need to perform triage.

"Starts occasionally" sounds like a bad fuel pump.


ps GM cars have a "prime" wire under the hood. Does a Crossfire ?

 

Update: I opened up the relay control module and tested the relay manually. I find that if I close the fuel pump relay manually, I can hear the fuel pump prime up (the noise when you first turn the key to on without starting the car, so I think the fuel pump is fine, and its the relay module that is the culprit.

Looking now for a replacement relay control module.

 

possible the fuel relay in rcm is going bad. That was the issue with mine.

 

Yup, I opened up the RCM, when I manually close the fuel relay, I can get the fuel pump to prime and get the engine to start.

Do you know where I can get a new RCM?

Thanks.

 

You could send the RCM to Tighed1 and get it overhauled for $30 ? with new relays as required. Who is to say a used replacement is going to be much better. A new after market one is around $120 and up.
CLICK

 

Quote:

Originally Posted by onehundred80

You could send the RCM to Tighed1 and get it overhauled for $30 ? with new relays as required. Who is to say a used replacement is going to be much better. A new after market one is around $120 and up.
CLICK

Where's the "LIKE" button on this Forum!?

 

Yeah, I will shoot tighed1 an email later to send him the RCM. I also ordered a new one as well just in case it happens again I can have another one to swap out.