I have been hearing what I thought to be a weak fuel pump during cranking operations for some time now. I have had a new fuel pump on the shelf waiting for confirmation that it needed replacement. Waiting might have not been a good idea. 95 degree Florida sun, Xfire decides to quit running. only 4 miles from the house. BAS ESP code pops up when she died. I disconnected the battery to clear the code. I happened to have a 10mm spanner in my pocket. I took out the RCM and reconnected all of the connectors and stowed it away. Reconnected the battery I could hear a single click in the rear of the car when I would turn the key to the position that normally activates the pump several times. One time I thought I heard the pump run and went to the start position and the car started and ran, but only for about 4 seconds.
I ended up having it towed home an hour later and put it back in the garage. ... Fuel pump? Have I created other problems by waiting?...This is the black SRT with 156,000. Thanks in advance.

 

My first guess would be bad RCM.

 

All of my RCM's have been sent out for resoldering and relay replacement within the past 2 years. Yes, I suppose I could swap out for the known good one to see if that fires off the fuel pump. I'll try that and get back with the results. If the fuel pump relay is burned,and the known good RCM starts the car, it will most likely be that the pump and filter both need servicing I am guessing.

 

How long have you owned the car?

How old is the battery?

Have you ever had the RCM resoldered?

 

You can open the RCM and force the fuel relay closed (wedge something behind the relay arm so contacts are touching).
Then see if she runs. If so, it's the fuel relay.


When I work on RCMs I always replace the air pump relays (PO410 fault), resolder bad joints (Mystery No Start) AND perform the Me So Horny mod (horn works w/o the key).



IF there is a known problem with no start and the radiator fan spins up REALLY fast with the key in the ON position, I'd replace the engine control relay.


If there's a problem with the wing being stuck in the UP position, BAS/EAS dash faults, speedometer not working, I replace the traction control relay.


In your case (if bad fuel relay) I replace that relay. So it's possible that I replaced your air pump relay and since the fuel relay has failed.



Because of this possibility I offer to replace all relays, minus horn relay (it never goes bad). Gives me (and the owner) piece of mind knowing I'm not sending out a repaired RCM that will fail again in the future. $50 return shipping included.


tighed1@hotmail.com for details

 

You must have one SERIOUS solder sucker, DJ,
That's always where I have a problem trying to remove the old relays.

 

When the engine quit, as I was just leaving a light and was up to about 12 mph.,I did notice the fan spin up as I was crossing lanes heading for the shoulder. Its been raining out today and now that it has quit, I am going over into the garage to perform the RCM swap. I'll get back with you DJ for the shipping info because I will most likely be sending it to you and I no longer have it handy....thanks for being there.

 

A swapout of the RCM showed that the car would crank and run, so, I'll be boxing it up to send out for full re-hab. I see where it was sent out in 2015 for the basic stuff. I probably still need to change the filter so the pump will not work so hard and pull high amps. I swapped it with the one that has not been sent out from the SSB Roadster.

 

Thanks for posting the outcome, so many do not.