[ujslost]

I know this is the 5.0 section but what the hell.

I been working on a speed density 89 model 351.
New timing chain, dist., wires, plugs, tfi module, map sensor,and head job.
the damn problem is this, at low throttle it runs great. at half throttle or wot it bogs and starts popping.

Any ideas what to check next.
BTW timing set at 10*, then up to 14* no change. Fuel pressure, is around 30-32 but at idle when you rev it up it drops a lb or 2.

[tording92lxnotch]

What ECU are you using?

[ujslost]

this is in a e350 van, its all stock shit