Ive been scratching my head on this one. So hopefully someone hear can help. A little history, I bought a 1983 camaro with a 2.5 tbi unit plus its a standard trans . It was kind of a basket case. I like the challenge. Well first after a manual and a box full of parts removed from the engine. I got it to run. further diagnosis, cyl head cracked, replaced it. Ok, moving on, runs so so. so I run it in the field mode, check the codes, egr bad, replace. Also time it in the field mode after replacing major tune up parts . still dont run very well so I repair exh leaks change o2 censer, boil out carb, check compression, all around 105. recheck field codes shows no errors and still runs bad. check for vacuum leaks seems ok. What it is doing , it will idle for a little but serging and die. It starts right back up and does the same. cant rev it at all just dies. checked fuel sys and filter, seems ok. only thing Ive seen comparing the book to the eng is # 1 is in a diff place but firing order is correct. Hopfully someone has some insight that I might be missing. Thanks in advance.