[QUOTE=Perry Mitchell;313046]
Quote:
Originally Posted by Ccmano
The chip you showed a photo of does not go to any year LT5 engine based on the numbered sticker. It is missing it's blue cover and the smaller chip you see on the top of it appears to have been added. I don't think you have a pump problem at all. The chip commands the fuel pump relay. If the chip is bad there is no power from the relay to the fuse. In any case take this one step at a time.
H
 [/QUOTE
The Delco AXFK 0277 is the correct original chip for a 91 Z, although it is missing the blue cover and appears to have a piggy backed chip installed. |
I stand corrected, I was looking at the code for the updated chip BFXB by GM for 91. The OP States the engine is actually a 90'. This could be part of the problem. Nevertheless his code 41 will prevent any sort of secondary operation above 4000 rpm. I'm still inclined to think the chip is the primary problem here. Especially one that has been modified like this.
H