What do you guys charge to hook up and check the computer for diagnostics? Got a proline with twin mercury out boards that won't one of the engines won't idle(or idles extremely rough, but if you give it a bit of throttle the engine smooths out and seems to run fine. We change the throttle position sensors. We have done a tune up, but are starting to suspect an air pressure or fuel issue.
Engines are 1999 Mercury Optima 225 DFI out boards. Let me know if you guys have some pointers or can hook up to it.
Thanks,
Justin