Tom,

Ok I moved the minute hand back 5 min's..... Make sure you fully warm the engine up on the stock ECM first.

Also make sure you have the injectors configuration set up for low impedance injectors. The manual goes into detail on how to do this. You can also send me your tune up file and I'll have a quick look see.

The bonus of TBI is you can look and see if the injectors are spraying fuel while your cranking. After you check all of the above, I'd do this next - it'll tell you right away if you have a fuel delivery problem.

efi

Last edited by efi-diy; 05/03/10 04:08 PM.

51 GMC 4.2 turbo
Can't solved today's problems using the same technology/thinking that created them