You should check the vacuum hoses that connect the solenoid/vacuum control valve to the EGR valve. Make sure that they are routed properly and in good shape (no cracks, etc).



I would also go through the diagnostic tests in the shop manual to ensure the wiring is ok. If you don't have a shop manual, http://www.dhost.info/accordinfo/ has the 94 shop manual split into chapters at the bottom of that page. You want to look at the fuel/emissions page 11-115 for EGR problems.