IT HAS LONG BEEN clear that ill-starred Enron Corp., whose founder and chief executive, Kenneth L. Lay, was indicted last week, deliberately manipulated electricity markets to intensify the California power crisis of 2000-01, forcing electricity prices up across the West. But recently released tapes of conversations between Enron traders have reminded the victims of just how cynical that manipulation really was. "I want to see what pain and heartache this is going to cause Nevada Power Company," gloats a trader on one of the tapes, just before completing a deal. "I'm still in the mood to screw with people."

The ratepayers of Nevada -- and the rest of the West -- are right to feel angry about what Enron did and right to feel aggrieved about the billions of dollars they overpaid for electricity as a result. It's hardly surprising that their anger has spread to Congress, particularly during an election year. Rep. Anna G. Eshoo (D-Calif.) recently got the House to pass an amendment to an energy appropriations bill, effectively requiring the Federal Energy Regulatory Commission (FERC) to give the public easier access to Enron documents. Some, including Sen. Maria Cantwell (D-Wash.) and Sen. Dianne Feinstein (D-Calif.) want the Senate to do the same.

But while calling for access to documents lets off political steam, it doesn't address the more fundamental problems with federal energy regulation, as many in Congress know perfectly well.

The much larger concern is that FERC's failure to resolve quickly the gaggle of multimillion-dollar lawsuits and regulatory cases filed by public utility commissions across the West has hampered investment and left energy markets in turmoil.

The fault is partly FERC's. Each case involves different legal issues, but on the whole, the commission's reaction to them has been slow, overly cautious and narrowly legalistic. At the same time, Congress has refused to heed the regulators' continued pleas for more powers, and particularly for the right to exact the same kinds of civil penalties other regulatory bodies do. Because FERC was set up in a different era, it is a quasi-judicial body, with little ability to enforce rules. Its commissioners argue that they have acted according to their interpretation of the law, which among other things does not allow them to invalidate old contracts retroactively. Spokesmen also point out that some of Enron's behavior was ugly but legal, which limits what FERC can do now. Indeed, much of what happened can be attributed to the poor design of California's electricity markets -- a design that FERC opposed.

Nevertheless, it is becoming clear that FERC's overly cautious approach to the Enron aftermath, the fault of both FERC and Congress, has damaged the regulatory commission's standing and even its ability to oversee market regulation in the future. In California, Nevada, Washington state and elsewhere, the acronym FERC has become a byword for impotence. Its job was to protect consumers, the argument goes; it didn't protect consumers, and it doesn't deserve more powers. Yet the future success of deregulated energy markets depends on the existence of a reliable regulator, with enhanced powers to enforce standard market rules and to penalize companies that fail to comply with reliability requirements or that manipulate markets. It's probably too late to undo all of the damage, but in upcoming cases FERC should take far more seriously the spirit of the law, which was designed to protect consumers, and Congress should quickly act to give FERC the powers it needs to prevent market manipulation.