91 camry won't start

How do you know there is no electrical problem? Does the starter engage and is there spark at each cylinder?

Is fuel being delivered to the injectors?

Start with the basics - air, fuel, and spark at the appropriate times.

timing belt probably. did it just stop? if it did that is probably the reason

its not the and there are sparks on each cylinder, at first they thought it was the gas filter but its not, not they are thinking it is the fuel pump...

It would be helpful if you did not delete prior posts so that people responding to your request know or remember what was suggested.

If you are getting spark at each cylinder, then the remaining possibilities are air, fuel, and timing.

Make sure thee air filter is not clogged.

The proper way to check for fuel delivery is to install a fuel pressure gauge. If there is no fuel pressure, then the fuel pump is a possible culprit. Check for power at the fuel pump.

Assuming that the engine cranks, does it crank more quickly than normal? If so, then the timing belt may be broken.