CPS and Fuel Pump
Senior Member
Joined: Dec 2010
Posts: 12,780
Likes: 184
From: Lineville, AL
Re: CPS and Fuel Pump
I replaced the CPS. No Change. I now have a spare which from what I read is a good thing.
There is NO voltage at the fuel pump, OR across the fuel pump relay fuse. There IS power to the RCM. I checked voltage across the other RCM fuses.
Is this a symptom of a bad relay or RCM circuitry, or should I check something else?
I just also re- re-soldered the board on the RCM; what the heck, right? No change.
And, Yes, I found several 'in the box' RCM's for $175 or less. This seems like the next logical step; but I don't think I need a spare one of these.
Any other Ideas, or should I go for the RCM?
There is NO voltage at the fuel pump, OR across the fuel pump relay fuse. There IS power to the RCM. I checked voltage across the other RCM fuses.
Is this a symptom of a bad relay or RCM circuitry, or should I check something else?
I just also re- re-soldered the board on the RCM; what the heck, right? No change.
And, Yes, I found several 'in the box' RCM's for $175 or less. This seems like the next logical step; but I don't think I need a spare one of these.
Any other Ideas, or should I go for the RCM?
Where are you located ?
Thread Starter
Joined: Sep 2010
Posts: 18
Likes: 0
Re: CPS and Fuel Pump
Thank you Les, onehundred80, and ala_xfire. The new RCM is on its way. Hopefully, I'll be up and running between Wednesday and Friday.
I do hope I will be able to give back in the way you all have done so graciously.
I do hope I will be able to give back in the way you all have done so graciously.
Senior Member
Joined: Apr 2006
Posts: 25,432
Likes: 648
From: Ontario
Re: CPS and Fuel Pump
I replaced the CPS. No Change. I now have a spare which from what I read is a good thing.
There is NO voltage at the fuel pump, OR across the fuel pump relay fuse. There IS power to the RCM. I checked voltage across the other RCM fuses.
Is this a symptom of a bad relay or RCM circuitry, or should I check something else?
I just also re- re-soldered the board on the RCM; what the heck, right? No change.
And, Yes, I found several 'in the box' RCM's for $175 or less. This seems like the next logical step; but I don't think I need a spare one of these.
Any other Ideas, or should I go for the RCM?
There is NO voltage at the fuel pump, OR across the fuel pump relay fuse. There IS power to the RCM. I checked voltage across the other RCM fuses.
Is this a symptom of a bad relay or RCM circuitry, or should I check something else?
I just also re- re-soldered the board on the RCM; what the heck, right? No change.
And, Yes, I found several 'in the box' RCM's for $175 or less. This seems like the next logical step; but I don't think I need a spare one of these.
Any other Ideas, or should I go for the RCM?
Can you operate this with the RCM opened up and NOT inserted in the black box, just so you can see the relay operate or not? A lot could be learned if you can see it in operation.
The contacts should be close for continuous fuel pump operation, I think.
Thread Starter
Joined: Sep 2010
Posts: 18
Likes: 0
Re: CPS and Fuel Pump
Yippee!!! Yippee!!! Hip Hip Hooray!!! I Installed the new RCM this evening; and all is well. Another 75 miles down the road, and I will be able to test for codes; but I espect none. Now that I have identified the culprit RCM, I can search it for the open circuit, repair it, test it in my car, and post it refurbished for sale at a very, VERY reasonable price.
AGAIN;
Thank you to everyone who helped me through this 'no-start' issue. Sometimes, a simple re-solder is not enough. As I go through testing for the open circuit, I will 'pay back' by posting my process.
I am a HAPPY Crossfire DRIVER, again.
AGAIN;
Thank you to everyone who helped me through this 'no-start' issue. Sometimes, a simple re-solder is not enough. As I go through testing for the open circuit, I will 'pay back' by posting my process.
I am a HAPPY Crossfire DRIVER, again.
Senior Member
Joined: Dec 2010
Posts: 12,780
Likes: 184
From: Lineville, AL
Re: CPS and Fuel Pump
Unless you REALLY want to do the troubleshooting, send it to DJ ( tighed1 ) and for $20 or so he'll lay his magic hands on it and it will be all better.
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