vettebigguy wrote:
Hi guys, I really need some help here. I have a '93 LT1 with about 40,000 miles on it. Last month I was driving her and all was fine,I had been on the road for about 125 miles and suddenly the engine just quit. ( at 60 MPH!) I managed to get her started and she ran for a short period of time, ( minute or so) I got her fired up and she ran off and on for about an other 3/4 hour. I got it to my friends place in Spokane Washington and then she really gave me trouble, would hardly start and not run at all. I got it towed to the Chevy dealership and they changed the fuel pump, thinking that was it. NOT, 500 bucks later still the same thing runs fine cold then quits when hot, we have since changed the ECM another 500 bucks, now they think it is the BCM, the mechanic says he has tested everything...but he looses an injector pulse and that is when she quits....I am into this for big bucks and they can't seem to figure this out, does anyone have ANY ideas. They have had the car a month and are no further ahead....I have never had any trouble in the past and she is a one owner car. He said he can start the car and she idles for about 1/2 hour and then dies, he says he has spark , good fuel pressure, and all injectors are good...can some one please help me, I am getting very desperate , frustrated and am disappointed with the Chevy Dealership. ANY ideas would be greatly appreciated....thanks everyone...I hope to hear from you

vettebigguy wrote: They told me that GM has Tech support for only 10 years then they throw out the info?? Is that right?

vettebigguy wrote:
40652 check no start. After engine runs for 20-30 minutes, it dies and will not restart, until it sits, for several minutes. Then will start and run for a few minutes and repeats the cycle. Check for spark, has spark. Check for fuel, pressure is at 40-45 pounds. Check for INJ pulse, there is no INJ pulse when engine will not start. Check codes, none stored in ECM, CCM,(BCM) has a history C0041 for no com with ECM stored. Cleared code to see if it would reset. It does reset when engine cranks and will not start. Test CCM for power inputs grounds all are OK. Voltage drop on B+ is about 200 mv, about 125 mv on B- side. Readings are the same when the engine runs. Intermittently CCM looses communication when eng won't start. Follow diag chart for C0041. Test comm circuits from CCM to ECM, all are okay, no shorts or opens. Tried a known good CCM engine still has same problem. Tested B= and B- to ECM all okay, similar to readings for CCM. Test all relays and loads on quad driver circuits to see if a component is shorting when hot, and shutting the ECM down.All readings are under the maximum allowed of 750 MA. Check signal for high and low RES crank sensors with a lab scope, both look okay when cranking and engine won't start. Captured data with tech2 and reviewed data. All readings appear to be within normal ranges.

This is the report I got from the Gm dealership, of what they have done. This is the sum total of I know to have been done. This is copied right of the work report.
Yeah, Blade_1 you aren't the first one to mention getting money back..... Makes a guy wonder sometimes, they are there for the initial sale, but afterwards?? They told me that GM has Tech support for only 10 years then they throw out the info?? Is that right? Holy, they could throw that sort of stuff in MY garbage can..LOL !!Thanks guys, I hope you can shed some light on this for me...cheers for now..