ccrm?

[sholady]

First the problem: my SHO would crank but not start (like it would if it was out of gas). It would sit down for one or two weeks and then would start up as if nothing ever happened. It could be anywhere from one month to four months before this would happen again. No symptoms to let me know this problem is coming. The last time I got stranded at work. There are no codes showing up, and I replaced the CID. I don't think it is the CPS because I am getting some RPMs.I am now going to replace the CCRM. I was wondering could the CCRM cause this problem? Thanks beer pizza

 

[bradman]

Is it CCRM or IRCM? If you're talking about the relay module over the radiator, then I think the answer is YES. If the fuel pump relay is not working properly, it seems that it could cause an intermittent starting problem as you describe. I had a similar problem with my 89. Maybe others her will have better advice.

 

[EHBOY]

Yep, when i first bought my SHO, this was happening to me. The place that i bought it from couldn't even diagnose the problem. I went a long time until it started happening more, and more and finally every time. Camshaft Position Sensor was the culprit. Threw no codes and for the most part, i even had a tach. reading every time. headbang

 

[projectSHO89]

The CCRM and IRCM are the same part, the terminology is different based on what year car you are discussing. The 89-92=IRCM, 93-95 it is called the CCRM.

Yes, sholoady, the relay module may be be the reason for your problem - or it may not. As the problem appears to be intermittent, troubleshooting it will be difficult unless you can catch it "in the act" and perform diagnostic tests at that time.

Steve

 

[rangerj]

SHOLADY,

Check at you local Auto Recycling Yard (junk yard) for a used ICRM/CCRM. They should be relatively inexpensive. Then the next time the problem occurs swap the ICRM.

When the problem does occur, can you hear the fuel pump being energised?

The ICRM provides the relays for the fuel pump(s), the A/C coil, the engine cooling fan(s), and the Control Module Power. The A/C relay is solid state, but the others are mechanical relays (I think - Steve, SHOZ123?)

It operates on vehicle power (VPWR - translation battery power, ie 12+ volts) through the ignition key (KPWR) and is under the control module's "control".

So, do you have an ICRM problem, a control module problem, an ignition switch problem, and/or a wire or connection problem, in any of the aforementioned?

I'll see if I can find some test proceedures for you for the ICRM (or CCRM depending on the model year), and the control module.

In the interem check the connections at the ICRM and the control module. Make sure they are clean and making good contact. rangerj

 

[sdpatt]

A simple test for the ICRM being your problem can be performed. When the engine fails to start, turn the ignition key OFF then again to the ON position without turning all the way to the START position. While doing this, either have someone else or yourself, listen carefully for the telltale "click" of the fuel pump relay in the ICRM above the radiator. This relay is audible each time the key is turned ON and should energize the fuel pump for about 1.5 seconds if the engine is not started.

If you hear the "click" from the ICRM and the engine doesn't start, the next thing to listen for is the fuel pump running. When the key is turned to ON, you should be able to hear the whine of the fuel pump for about 1.5 seconds from the fuel tank under the rear seat. The pump should generate a steady, high pitched hum indicating that it is on the job.

If you are hearing both the ICRM relay and the fuel pump, you need to check elsewhere. If you have not yet checked for the EEC codes, this would be a good time to learn how to do so. All it takes is a short length of wire, the ignition key and the testing information available at the sites at the bottom of my signature. Let us know what you find.

 

[sholady]

Thanks for all of your input, it's extremely helpful. Definately sounds like the problem is the CCRM. I got one from Al Fitz beer beer Thanks alot yall thumb

 

[dietztho000]

this is the exact same problem my ATX 93 SHO is having.
When I turn the key to the on position, I hear the CCRM and the fuel pump turns on.
My codes were reading 511 - which meant to replace the ECA and I did that and it started once, but then now it doesn't start again. I had to other codes, both about to rich and to lean for the o2 sensors...would that have anything to do with it?
Or what else could be stopping my car from starting.
I also have another thread...http://www.shoforum.com/showthread.php?p=1231758#post1231758
explaining more about my problem.
any help would really be nice