After about 2 months of sitting in the drive way my '91 Silver Aniversary is back on the road. I had the codes pulled way back when and found that it had hard faults for the EGR valve, EVP sensor, and MAP sensor. I changed out the EGR valve....the most expensive item.....with no success. At this point I got skeptical and let it sit. I didn't feel like spending the money on the other parts only to find that it didn't fix. I had read everywhere that a map sensor wouldn't keep it from running so I didn't suspect it would fix it but finally decided to try it and what do you know. It worked. Woooo Hoooo. Back on the road.

 

Way to go! glad you got her back on the road again. those codes are great if you know how to use them.