Can A Disconnected Egr Cause Misfire?

[Capri306]

The "problem" is that that part of the EEC-IV instructions include the use of EGR in its programmed strategy for a/f ratio. It is programmed to 'anticipate' (for lack of a better term) the dilution of the a/f mixture by inert exhaust gas. This is the reason for many people with disabled or malfunctioning EGR experiencing higher temperatures (because it runs leaner than it should), pinging (again, due to lean mixture), and cruising problems. Now theoretically the EEC should be able to correct for this using the HEGO, but most of the time it's not using that signal for mild- to WOT-acceleration; it's more-heavily relying on other inputs.

I'm going to maintain my stance that it's to your engine's and your own benefit to keep EGR attached and operational. There is absolutely no reason to remove a functioning EGR system on an EEC-IV-equipped street-duty vehicle, other than your mind playing tricks on you.