limp 7730

[Fisystems at aol.com]

 AUJP GM prom erased and reprogramed. I have unplugged and plugged it in a 
dozen times. Seems to be okay. I also swapped the ECM, distributor, plugs, 
plug wires and the map sensor.  

<<Are you using a 1227730 ecm or one of the updated units. I've had a ton of 
trouble with the old 730's.
AL>>

One of the ECM's is a reman unit and the other old stock. How can you tell if 
its an updated one?

<< Is this with a stock (eprom soldered in) memcal, or something with a socket
 on it?  If it's socketed, could be a connection problem.   
 
 -> Bob Valentine
 -> bob at tecmark.com
 
 
 At 11:36 PM 5/8/2001 EDT, you wrote:
 >
 >Strange problem for me but, maybe you guys have had or heard of this. I'm 
 >running a 7730 on a L98 TPI race engine. Dyno numbers 510tq 465 hp. The 
 >problem is the thing will go into limp mode every time I shut it off and 
try 
 >to restart it. When it restarts it's in the limp mode. No communication 
with 
 >scanner and base timing with static pulse width at the injectors. It will 
 >stay that way until I disconnect the battery and reconnect it. I can then 
 >start it and it will run fine, no codes, close loop and good power. I have 
 >checked the power wires and grounds and all seems to be in order. I moved
 the 
 >battery power to switched power so that I can shut it off and than restart
 it 
 >without having to disconnect and reconnect it. With it wired that way if 
the 
 >engine stalls and the power switch is still on, I can watch the scanner 
lose 
 >communication after about three seconds. If I just hit the start button 
 >without turning the power off and back on it's in the limp mode. Any ideas?
 >
 >Thanks
 >
 >Ken >>
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