2002 Tahoe Starts and instantly dies over and over

[dannyboyjg]

I'm working on a 2002 5.3 Tahoe and it will fire and instantly die over and over. I have fuel pressure at 55-56 when key is turned on and drops about 4 psi. Replaced spark plugs and fuel filter during this issue. I have used spark tester and lhave strong spark. I have voltage going to coils. I placed a timing light on number one but light did not flash nor on two adjacent plugs. I have been told about the security issue so I tried retraining procedure a couple of different times. The security light only flashes when key is off or removed never when trying to retrain. The battery light comes on in display during this time and flashes slowly. Im lost.Any help would be really appreciated.This came on suddenly by the way. Parked it after running just fine and went to take off and had issue. Thank you. Almost forgot with a simple pocket scanner I do not have any codes.

[Jsdirt]

This has all the symptoms of a security issue. That cuts injector pulse after a couple to a few seconds of run time. Check fuses in underhood fuse box. I had this happen on a '00 Jimmy many years ago, and it was a blown fuse. I don't recall 100%, but a flashing light indicates a security problem if my memory is straight.

 

No clue why mine blew, but replacing it fixed the problem. There were 100,000 other issues with that toilet, so it got parted out and scrapped over a 8 year period. The engine finally ran great without all the electronics - back to a carburetor & HEI ignition ... but I digress ... 

[Doug_Scott]

Shouldn't it also set a code?