Bill, the pressure regulator is built into the TBI unit. You have to pull the entire injector "pod" to access the regulator.

Here's a link to a pressure regulator repair kit at Partsamerica.com:

http://www.partsamerica.com/product_images/img/nie/21732-1.jpg

It sure sounds like some freak thing, who knows whether a sticking regulator, probls with the injectors, or bum connection in the EFI circuit might cause that to happen??

Maybe you'll get lucky and the problem won't repeat!

If it does, you may need to pick up a couple of those injector test light thingamajigs (if that term is too technical, try "Noid Lights"!) that will tell you whether or not you're getting injector firing voltage from the ECM.

Here's a few more links to tickle your fancy:

http://www.toolmancentral.com/Fuel_System_Accessories-c1339-pg4504.htm

http://www.goingfaster.com/spo/tbi.html

http://www.cfm-tech.com/catalog/tbi_injector_install_kit_684301.htm

http://www.witchhunter.com/

HTH.....ed