Double check to make sure the dist. is in right and the firing order is correct.
Damnit...help!!
Thread Starter
Tech Contributor
Joined: Oct 2008
Posts: 3,729
Likes: 190
From: Custer, WI
Damnit...help!!
Alright I just finished wrapping up the corvette.
I took it apart and
-ported intake manifold base
-installed as&m runners
-installed ported plenum
-relocated IAT (plenum had a blockoff plate where IAT is)
-eliminated CSI
Now when i try to start it, it cranks and backfires through the exhaust..i heard that when it backfires through the exhaust that the timing is too far retarded, so i advanced the timing a bit and it backfired through the intake. it was REALLY loud, not like it did when i first got it where they were minor backfires.
Is the timing really that sensitive? When i move it the slightest bit it backfires through the intake, if i move it back it backfires through the exhaust.
SAVE ME!@!!!
I took it apart and
-ported intake manifold base
-installed as&m runners
-installed ported plenum
-relocated IAT (plenum had a blockoff plate where IAT is)
-eliminated CSI
Now when i try to start it, it cranks and backfires through the exhaust..i heard that when it backfires through the exhaust that the timing is too far retarded, so i advanced the timing a bit and it backfired through the intake. it was REALLY loud, not like it did when i first got it where they were minor backfires.
Is the timing really that sensitive? When i move it the slightest bit it backfires through the intake, if i move it back it backfires through the exhaust.
SAVE ME!@!!!
Racer
Joined: Jul 2005
Posts: 387
Likes: 3
From: Indian Trail, NC
Safety Car
Joined: Jan 2008
Posts: 3,939
Likes: 1
From: Vero Beach Florida
Sounds like timing could be off. Bring #1 cylinder to TDC compression stroke check rotor position should be pointed @ #1 cylinder and check mark on harmonic balance should be 6* on tab. If necessary pull and reposition dizzy. Firing order 1-8-4-3-6-5-7-2 looking from front of motor clockwise on dizzy, moving the dizzy itself counter clockwise advances timing
Last edited by floridamale; Aug 3, 2009 at 07:34 PM.
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