Help... "97" 900 se Turb. .....problems..

Please give me some advice to my problem......I have a 97 900SE Turbo 5spd .....when the engine revs between 1800-2500 rpm the engine jerks...I thought it was the sparks, so I replaced the Bosch Super risistor plugs.....but still having the problem.....Initiallly when i first start the engine I don't see this jerking motion, but after driving for about 3-4 miles the problems starts.....Please help...My Neck Hurts SOOOO Much From All the Jerking from the engine......Desperate........Also does anyone know about putting Dielectric Grease into the DI unit ????????

Thanks for any inputs......

Well i had the same problem  first thing you did wrong was put in bosch plugs. thats a no no.. NGK V-Power BCPR6E-11 are the correct plugs for the DI yes Dielectric grease is a must and correct gap .040 the Di sends a signal to the PCM to ajust and with bosh plugs or the rong gap can really mess things up for the DI if i were you i would do that first then if thats not it. Take and remove the DI after motor has been OFF for a minute or two and flip over so the 4 tails are facing up place the plugs  in ang run a wire from each thred to the negitive battery.. Then Crank over to see park if you do not see one spark your DI is gone try at least 3 time to insure as for the DI its avaible at CarQuest for $420 big price tag and comes in a GM box although its easy to replace its costly if you end up replaceing the DI contact me and i will give complete directions for replaceing and torx specs for everything. Good Luck!
 
Ed
850-766-3182