I posted on this earlier, thinking just a tune up was all the car needed, but know the problem seems worse, or at least I notice it more. The car hits about 1800rpm and then drops if i try to hold it there. Thats only when the car is warming up, after the car is warm, that drop isn't there. Anytime, however, the car just generally lacks power up to 2500rpm. I'm thinking maybe a vacuum hose? or something. The car didn't do this until after I put it back together after replacing the manifold studs. I had to take off the rear head, thus, a lot of hoses. Any other ideas or something in particular I should look for?
thanks for any replies

 

vacum leak?

 

Im thinkin maybe the TPS since it is harsh when warming up. However, you did remove the rear head so maybe one of the injectors or o-rings took a mistaken beating upon removal or installation. Good Luck