Have you never taken your vehicle to a mechanic?

@NeutronSynapse: I asked about the computer...what do you do when the computer goes haywire

@Fernie: Replace it. You can find tested units online for most modern cars. If it's a matter of expense, go for a used computer that has been tested.

@Fernie: If you're willing, you can find a local yard and possibly pull your own.

They always find some bs you got to fix b4 pass. My 4x4 usually needs a bush or 2. Fookers got me on a slight drop from my diesel pump last year

@theoneyouwerewarnedabout: It's BS too! I had my El camino tested with and without racing equipment, on the same motor, and it blew cleaner with the racing equipment. I put a chevy small block in my Cherokee, it was a bitch to get them to test it.

My friends got a suped up v8. He's got to take a bunch of stuff off it including the exhaust manifold to get a pass. Then put it all back on after.. Nanny state

Me too.

with a multi meter and a test probe
engines require only three things
fuel...air ...and an ignition source

If you feel apprehensive about busting into your own, go to the parts yard and pay two bucks so you can take apart another vehicle and become more familiar.