LT1 fast xfi & xim ls7 coils no start
08-18-2012, 02:05 PM
#1
LT1 fast xfi & xim ls7 coils no start hey everyone i have had issues forever now and cant get the car running.
everything seems to be right and coils are firing but wont turn over just burps and pops!
1994 lt1 397 stroker
fast xfi 2.02
fast xim
fast 4x crank trigger set at 50 deg. btdc
new ls7 coils (no heat sink version)
a/c delco optispark converted for cam sync only!
i use a timing light while cranking and im getting roughly 25 deg. btdc and thats right where xfi is telling it to be so its right.
made sure every coil is firing and it is and all the wiring is correct to each coil from harness.
my dip switches are correct (00001101).
harness is wired and looped for discrete sensor.
both xfi and xim are communicating and are getting cam and crank signal.
i have a data log from today while cranking im attaching!!
here is a link with some pics and video of the leds on the xfi and xim.
http://s704.photobucket.com/albums/w...xim/?start=all
everything seems to be right and coils are firing but wont turn over just burps and pops!
1994 lt1 397 stroker
fast xfi 2.02
fast xim
fast 4x crank trigger set at 50 deg. btdc
new ls7 coils (no heat sink version)
a/c delco optispark converted for cam sync only!
i use a timing light while cranking and im getting roughly 25 deg. btdc and thats right where xfi is telling it to be so its right.
made sure every coil is firing and it is and all the wiring is correct to each coil from harness.
my dip switches are correct (00001101).
harness is wired and looped for discrete sensor.
both xfi and xim are communicating and are getting cam and crank signal.
i have a data log from today while cranking im attaching!!
here is a link with some pics and video of the leds on the xfi and xim.
http://s704.photobucket.com/albums/w...xim/?start=all
Last edited by lordrazo; 08-19-2012 at 07:47 PM.
08-19-2012, 07:43 PM
#4
firing order is correct fast xim has it as coil abcdefgh and they fire in that order so a=1, b=8 c=4 so on and that's all correct! i have a video in the link supplied that just shows spark and it does look good. and no i haven't used starter spray. the opti works just fine no need for a oscilloscope as i know its sending signal fast xim and xim can prove that. i put a timing light to each plug and they are all getting signal as well so i know each coil is firing!
08-19-2012, 09:08 PM
#5
firing order is correct fast xim has it as coil abcdefgh and they fire in that order so a=1, b=8 c=4 so on and that's all correct! i have a video in the link supplied that just shows spark and it does look good. and no i haven't used starter spray. the opti works just fine no need for a oscilloscope as i know its sending signal fast xim and xim can prove that. i put a timing light to each plug and they are all getting signal as well so i know each coil is firing!
08-29-2012, 05:54 AM
#7
**update** to finish the thread
car is running!! the cam sync was out 180deg. so instead of pulling the opti off i repinned the coils at the harness and now instead of the xim going abcdefgh in my firing order its now efghabcd just running bank to bank right now ill have to repin the injector harness to run sequental which ill do this weekend...
car is running!! the cam sync was out 180deg. so instead of pulling the opti off i repinned the coils at the harness and now instead of the xim going abcdefgh in my firing order its now efghabcd just running bank to bank right now ill have to repin the injector harness to run sequental which ill do this weekend...
