Ok...yesterday I started a thread my C5 died! Today it came back from the other world. I want to share the particulars so others may solve similar problems in the future...I will also post on Bill Curlees thread and see if he can analyze this a little further...probably comes down to grounds in the end.

I have a 2000 vert with 112K miles...it is a daily driver and runs real well...having a few choice conservative mods...it pulls very strong. It is a 6 speed. The body looks really good from 10 feet, very shiny and red...lots of people think its a new car...I have to admit GM paint was REALLY good in this era because I don't wax often and the car is not
garaged...I rarely wash it because when it rains most of the dirt miraculously slides off of the finish.

Anyhow...I was driving normally yesterday when the car started to shudder and then promptly stalled. I tried to restart...but the car idled really rough and would not take any pedal....checked the battery and fuses and couldn't find anything wrong...only code was low idle.

I gave up and had it towed home. When I tried to lock the car with the fob...the horn alarm would start beeping so I left it unlocked. Came out this morning...same thing. I decided to check to see if the front top
locks were all the way closed...which might have caused this behavior...they were fine. For some reason I decided to pop the tonneau cover lock button to release it....Voila!...my key fob locked the car without setting off the alarm...what the hey?

So I felt lucky and decide to try and start it...worked like a charm...the car is running better than ever. Drove quite a bit today and no issues.

Now how do we analyze this...so I can get to the root of the problem...one thing is my passengers side window leaks somewhere n ear the bottom of the top and I do get quite a bit of water behind the drivers seat...maybe some wire is getting wet...maybe its one of the grounds.....let's put our heads together on this one.












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Did you pull your codes?

 

Only code was low idle 0506

 

Took the switch out and did your service...thanks...it was easy and straightforward....car started right up....I took it around the block and it started stalling..got back in the driveway and waited 10 minutes...started up again..idleing normally...I let it idle for 10 minutes...it was fine. I stepped in and depressed the clutch...it immediately stalled and wouldn't restart. The codes I have now are rfa codes
1016....1096...1064. When I try to lock the car...the alarm goes off as before.

 

Are these codes history (H) or current (C)? Or both?
U1016 is loss of communications with the PCM
U1064 is loss of communications with the BCM
U1096 is loss of communications with the IPC

Based on the symptoms you described, I suspect that the codes are possibly related to your issue. Maybe not a complete explanation, but if your RFA module is not communicating with the BCM, it may be triggering the alarm...and if there is a security system issue, it would disable the ignition...
That doesn't explain the mystery stall, however. Sorry...

Hopefully someone else will step in and offer a more complete explanation. Bill Curlee where are you?

If you don't get a better answer in a reasonable amount of time, try sending a PM to Bill C or dadaroo. Both are very knowledgeable about the electrical/electronic systems of our cars...

One thing to try in the interim: open up the passenger footwell cover and remove the shorting bars from the star connectors. The "system response" of the car should help you narrow down possible causes and suspect circuits. The star connectors are part of the serial data bus....

Try it, see what happens, and post your results...

 

Thanks for the reply...I have been communicating with Bill...those codes were history codes and have not reoccurred.. At present the car will not start at all...it does crank..
I have discovered that there is no fuel pressure in the fuel rail...so got to start checking the fuel pump circuit

 

Does your battery have a good charge? A lot of electrical problems occur with this car if the battery is low