Ok start from the beginning. Car sat for 2 yrs but started and run for about half hour maybe once a month sometimes longer. Fixed it and started driving around April. About a month ago it started jerking on acceleration. But one under a strong load. If I was easy tit would not jerk. So found that the fuel pump under a strong load and the back to idle would drop 20-30 psi until it sat at idle for 5-10 min and then go back to normal. Didn't think that was the problem but still fixed it and now never changes psi. Than changes the fuel regulator and no change. Next looking into the MAS EGR and the EGR modulator. So replace the modulator and change a little but but not perfect. Was tied between the MAS and the EGR. I borrowed the MAS from my friend at the part store and put it in but didn't fully fix the issue. So would like to know if anyone has a good idea as to what is wrong or if someone has had the same problem and knows what fixes it.