lt1 .... spark problem?
Thread Starter
On The Tree
Joined: Mar 2005
Posts: 171
Likes: 0
From: Missouri
lt1 .... spark problem? OK, got a 97 z.... cam, heads p/p intake port matched, pro charger with 5psi pulley. The car has cut out since i got it at 5200 +. It cuts out like you hit the rev limiter. I have a msd 6al box and a 6400 chip in it. I thought it was a fuel problem, put it on a chasis dyno today and afr looked great. So must be something in the ignition...? Anyone had anything like this before. Car made 483hp 443tq ... with it cutting out. The graph looks just like it hit the rev limiter, then it comes back and cuts out again and comes back then hits the actual rev limiter at 6400. I need to get this fixed. I think it might hit 500 with it fixed...
if you are going to throw new parts at it start with plugs wires or the coil. optis arent cheap. i had a very similar problem and my aftermarket coil took a dump.i ended up picking up an msd coil from autozone for 45ish bucks and fixed it.might try that
Thread Starter
On The Tree
Joined: Mar 2005
Posts: 171
Likes: 0
From: Missouri
This thing shuts off at 5200 like someone pulled the coil wire off, i mean its crazy. Then comes right back and does it again all the way to 6400 when it hits my chip in the msd box.
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What are your plugs gapped at?? Anything much more than .035 and it will do the same thing....blows the flame out.
__________________
95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
Thread Starter
On The Tree
Joined: Mar 2005
Posts: 171
Likes: 0
From: Missouri
already has msd wires on . Sounds like i'll change the coil first. dont know on the plug gap, i just well change them too if im going to have them out. if i replace the coil, go with msd? or ac delco, or gm?
I have had an MSD coil on mine for the past 6 years and haven't had a problem. And we use NGK TR6's for plugs on about all the supercharger builds. If you have to replace the OPTI, use GM. Jon
__________________
95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
Thread Starter
On The Tree
Joined: Mar 2005
Posts: 171
Likes: 0
From: Missouri
TECH Addict
Joined: Jul 2005
Posts: 2,153
Likes: 3
I'm the 3rd to post in this thread that I had a bad coil that caused a problem identical to that.
Furthermore, I like my MSD cap and rotor much better than stock because they fixed the rotor problem, plus added a screw to seal them from moisture better.
Furthermore, I like my MSD cap and rotor much better than stock because they fixed the rotor problem, plus added a screw to seal them from moisture better.
