Constant loss of power on camry 1990 2.0 dlx

[Mike_woodbridge]

Hi guys! I need your advice. I can't figure out what is going on with my car. It climbs uphill with no more than 40 mph, and it takes so much time to speed up on the highway. I changed spark plugs, fuel filter, air filter, put new cat converter, put new coolant temperature sensor, cleaned throttle body with special spray, cleaned air mass meter with spray. I'm not a car pro, but to me it looks like it's not a electrical(wires, distributor or smth) problem.
Car has new starter and battery, starts every time(except when its 0-10 degrees outside,)
Fuel mileage for 2.0 car is horrible. On 13.5 gal full tank it made 300 miles.
Also a bit weird thing. In camry manual I read about resistance specifications for air mass meter between terminals VC-E2 should be 3000-7000 Ohms, but I read about 280 Ohms. I even went to a junk yard and measured 4 or 5 camrys, the same thing - 280. All 5 mass meters are bad? Any ideas?
When I connected TE1 and E1 terminals computer showed no error codes.
When I connected +B and FP terminals(to check fuel pump operation), I heard fuel going thru lines, like it should be(I didn't checked pressure though).
And also, does anybody know where is ECU connection?
Thank you.

['88 All-Trac]

Sounds like timing... Check compression, as well. If it's low, pour 1 tablespoon of Marvel Mystery Oil into each cylinder and recheck compression. If it goes up, rings. If it stays the same, valves.

[killrroy]

same thing here 91 camry but i replacxed everything computers.dist. cat evrything but block.lol.but i had got the car with blown head gasget and always thout the crank was a tooth off as the dist. has to be fully advanced and its slow to crank (not turn over but fire off)at first start.
is it posable that installing i got the timming off a tooth at the cranck. i know the cams are corect did them 5 times i was to unsure lol

[Mike_woodbridge]

First I thought it's a cat converter, then that it's a fuel filter at the fuel pump(inside the tank) But I have absolutely no desire to take tank off and replace pump/clean dirty filter(replacing leaking power steering hose was enough for me, ha-ha), so I'll just bring the car to autoshop on friday for diagnostics. Will let you know about results.

[Mike_woodbridge]

So I went to the shop on friday. After 1.5 hours the guy came out with no results. He said, our technician took it for a test drive and, yeah, you need to push acceleration pedal a bit more(Daaa!), and we don't know what it could be, maybe we should check compression. Also he recommended to change wires and distributor cap.F*k! Useless idiots! The same day I bought compression tool, checked compression. one cylinder was low, about 115 psi. Then I asked friend to adjust timing. He did. Looks like car got more power, but still not enough. Looks like I need new valves & oil rings(((
So one thing I see clearly: that shop is useless.