30th Anniversary Z28 OK so. . I have had the fuel pressure tested and its hittin 43 psi. . which is normal. . but when i crank the motor, it still does not want to fire. . it just sits there and turns with no intention of firing. . so i still do not understand the problem. . we have scanned for codes and the only available is random multiple missfire. . however there is moisture in the air. .is there a chance that there is moisture in the Distributor Cap?? Also the SES light pops on and off occasionally. . anyone that can help. please let me know. . i greatly appriciate it

 

Did you pull #1 plug and see if it is getting spark???

 

Sounds ignition related. There are a couple of write up's here http://shbox.com/1/how_tos.html #'s 25 and 26 that may help you narrow the possibilities down a little more. It is possible that there is some moisture in the cap, but it usually gets there from running through water or a leaky water pump. Not just damp days.

It really sounds like the opti crapping. Check to see if you have any antifreeze on the opti or leaking from weep hole on the back of the H2O pump. Do the above tests as well as check the coil for good strong fire and let us know what you find.