Good day sir/ma pls I need your advice on my car, Toyota corolla okere juowoelo. The oil pump get the issue and I took it to a mechanic workshop for a replacement and since then the car did not do slow again, 3 different mechanics have worked on it but to no avail they said it rewire work, and rewire came to diagnose it and nothing was done to it, if I start the car in the morning I will have to place my foot of the throttle for about 20 to 25 minutes before It started doing slow, and if I now drive it for like 3 minutes and I disengage it from gear, it will now high as if you are on high speed. Pls, I don't know if anyone has experienced this before the person should guide me pls. Thanks