Hello. I have a 1997 F-150 Truck, 4.2 8 cylinder engine, 2wd truck with 128,000 miles. 2 weeks ago, the check engine light lit up. I went to Autozone and the code was P0402. Truck seem to be running fine but could smell excess gas. Recently filled up, and 31 miles took about 1/4 tank which indicates quite a problem. Midas wanted $100 for diagonostics. I took it to Ford Dealership in Denver and got the following estimates:

1. DPFE SENSOR ($234 Labor & $141.96 part). ---- $375.96
2. MAF SRV/REPROGRAM - $130). ----$130
3. Fuel Service ($160.59 labor & $59.36 parts) ----- $219.95
4. Fuel Filter ($37.95 labor & $22.00 part) ----- $59.95
5. Coolant Flush (63.32 labor & $57.63 parts) ----- $120.95
6. Power Steering Flush ($35.69 Labor & $46.36 -----$ 82.05
7. Brake Fluid Flush ($45.87 labor & $44.08 parts) --$ 89.95

All with taxes and shop fees $1,145. And conveniently I was approved for $1200 Ford Credit card.

The truck was tuned up with new spark plugs and wires at 100K mark.

Here is my question, what should I do? If the dealership is correct, I plan on doing the first two. But I plan on taking it to a reputable repair ship as I think the parts and labor for the DPFE sensor are out of whack. When I left the dealership, I asked if the EGR valve was fine and he said it was.

PLEASE HELP. ANY ADVISE IS VERY HELPFUL.

Billy