intake manifold blowing air out?????

[JJSPEC Racing]

backfire from the intake check that timing. im sure it has been said already with the great minds in here.

get a leak down tester and a air comp. put the cylinder u want to test at tdc. install test in spark plug whole. fill with air read the gauges. listen for air flow from the intake, exhaust, oil filler cap, and in the rad. look for bubbles.

What he said. The timing looks ok. Verify that your spark plug wires are installed correctly and do a leak down test. What do the plugs look like?

[D15B]

the spark plugs are pretty shity but i still dont see why that would make fireballs come out of my intake manifold...i got the firing order right 1342 starting at the bottom left when facing the dizzy like this

o3 o4
o1 o2

i dont have the money for a leak down tester though im broke as hell

[Barefoot]

timing looks good

the spark plugs are pretty shity but i still dont see why that would make fireballs come out of my intake manifold...i got the firing order right 1342 starting at the bottom left when facing the dizzy like this

o3 o4
o1 o2

i dont have the money for a leak down tester though im broke as hell

your order is correct. only thing i can think of is u have bent valves or burnt. whats your location. i have a leak tester.