Fuel Injectors

[The Lost One]

A while back my 2000 F150 was hit hard on the drivers side while parked.
After having all the repair work done at my local Ford dealer it appears my injectors are plugged (3 of them). While the dealer ship claims this was repaired, no more than 240 miles after getting my truck back it appears the problem has come back.
This things drives like crap, and I really need some advise on how to fix this.
is there anything i can do myself to fix this, or am I at the mercy of the dealer ship once again?

For your referance this is what the dealer ship had found and repaired.
Fuel filter
Cleaned the injectors
it was also noted that there was a sample of the fuel saved stating the gas was bad from garbage in the tank moved around from impact of wreck.

[miesk5]

Do you have MIL (CEL..Check Engine light)?
if so, go to AutoZone for a free DTC check and come back with the codes; or look them up in my site under Part 1, troubleshooting.

Did dealer do a fuel pressure check & DTC check?

For now, check each injector connector for corrosion/tightness
and with a piece of garden hose etc. you can listen to each INJ click when firing.
more from micro-tech-auto.com:
"Many different problems can occur when injectors start to leak or become partially or completely blocked. Some of the symptoms could be:
Rough idle

No start condition

Hard cold starting

Flooding on hot start

Rich fuel mixture

Fuel leaking onto engine

Poor gas mileage"

and the steps dealer should do or have done:
http://www.asashop.org/autoinc/june98/techtotech.htm

you can rebuild or replace the 3 injectors yourself, but try to get them to do it again at no cost to you.