Check engine.. I think I am gonna blow it up

Ok guys here the run down.

I have a great 1990 Bronco, I have had it about 6 months. but ever since I got it I have been having problems with the check engine light. I have taken it to three shops and noone can figure out why. they all say just ignore it. But honestly I just want it fixed I dont want to ignore it.
I can drive it for 10 to 15 minutes and the light will come on. But I could pul over as soon as it comes on and turn the truck off and back on and it would be gone for another 10 minutes. I have checked for vacume leaks. Replaced the TPS, Egr, Brake booster , O2 sensor. Plugs and Wires. but it wont go away. now its reading 4 new codes
42 & 41 & 65 & 67
I ws told that 65 & 67 was nothing except we skipped two steps in the check engine tests.
Help!! I love my truck but I cant keep sinking money into it like this
What do I do!

hey. i had a similar problem with my 1995 ford escort wagon. the engine light would come on about 5 minutes after i turned the car on. the code came up to be like 102 or somethin, the cylinder ID sensor which indicates piston ones position. anyway the car wouldnt pass smog with the engine light on so we payed about $1500 to replace a stupid sensor and wires.

what is code 41 & 42?

How's the oil? I assume you change it every 2999. Do you hear any valve tap? How's the exhaust note? Do you lope at idle?
Of course, I'm steering you towards an oil pump. If you believe the thing is running otherwise fine, I'd leave the gremlins in the computer.