car wont speed up after 20 minite drive
 

after i drive the car to work is about 20 miles and when i get there if i stomp the gas the car revs to about 2000 rpms and hesitates but never stalls and most of the time when i cut the car off then on it runs fine i need some help and where i live not too many people nkow how to work on my car

I had the exact same problem, it turned out the guys at jiffy lube unplugged my tps(throttle position sensor) when they looked at the air filter, my car would rev to about 2000 then cut out but run fine when it got back down.

my car does that but it only does that in about 15 to a 20 minites while my tps is hooked up

Fuel filter?

have a bran new one on it

In take pickup screen clogging?

Did the old fuel filter looked clogged? When my 85s tank started rusting out inside took a matter of days for the new filter to clog back up.

Could also be the fuel pickup in the tank plugging up. Shutting it off would allow the debris to fall off the pickup and run again till it picked up enough junk again.

See if you can get a gas tank siphon or use the drain plug to check if you have any gunk on the bottom of the tank.

the old filter was pretty clean and i put a new fuel pump and screen on it not too long after the new filter

it still has the same problem i just put headers on my car and it does it sooner

i need some help i've had this problem for a long time know and still cannot figure it out i've put a lot of parts on the car and the problem still persists i believe now the problem is in the ignition timing because it sometimes acts like it is not correct when i crank it up in the mornings and when i give it the gas it dies down and when i let off it revs up high if i have this problem right on i will eventualy give up but i would hate cause i love my car too much