ElkySS

iTrader: (6)

had been on the car 2 days then went to the track. as soon as i run, this starts happening:

when im at wot and about 6k, it misses so bad the tach wont move. its been very on and off. under any other circumstance, it runs great. i called msd and they said if its not throwing a code for high ir low resolution, its not the opti.

any thoughts?

ElkySS

iTrader: (6)

i also put silicon around where the wires go into the opti and a thin bead around the cap to seal it to the base

93FireBirD

hows the coil? Are you sure its not something else?

ElkySS

iTrader: (6)

idk thats why im posting a thread. i kinda thought the timing may have been off when they made it so i asked msd how to set it back to factory settings. havent driven it since that yet. was kinda thinkin coil. its an msd blaster, been on there for
a year or 2, i guess. it does seem to get worse when its been running for a while

ElkySS

iTrader: (6)

anyone else?

defaultexistence

iTrader: (11)

check coil , check icm at your local parts store replace if needed, say fuckit and go efi24x

ElkySS

iTrader: (6)

icm is new but i got a spare so i guess ill swap it. i wish i could use the efi system. kinda broke at the moment tho. plus i have a double roller so idk how thats gonna work

brettmc

my coil and icm passed the tests on shbox's website but I replaced both anyway and that fixed my no-run problem.

BALLSS

assumeing your issue is not valve float....my MSD did crap at high RPM's also. MSD replaced it and I sold it. My original OEM opti solved the problem and is still on the 383

94Z28rag

iTrader: (10)

I stayed away from the MSD optis because of hundreds of stories like this. Cut your losses and get a new GM opti from Summit.

MasterTomos

iTrader: (15)

Funny there was a thread on here not too long ago and I got ripped on by one or two people for saying this...

mark97ta

iTrader: (1)

i am not familiar with these opti's but don't they have a timing adjustment... have you tired to play with that and see if it changes... could also be valve float... what plugs and their gap ?

ElkySS

iTrader: (6)

update: looks like i fixed the problem. i replaced the icm and reapplied the di electric grease. drove home wot the whole way, didnt miss once and ran real strong. wont no for sure till i drive it for a little while but this is the longest its gone without missing since the opti went on. if it does it again, im warrantying the msd and getting a delco. (which i have had)

robsquikz28

iTrader: (246)

update....