SN-95

Just got my mustang swap running. It starts fine, but seems to have a part throttle misfire. From what little bit ive been able to drive it, it seems to do ok at WOT. Its a stock lq4 longblock with 1 7/8 dynatechs, and a comp 234/238 599/604 on 110 lsa cam, victor junior, and holley 750. Car has a th350 with a 3500 nitrous stall and 456 gears. Its running open headers right now, and somebody mentioned that that might be hurting it, any truth to that?

My timing curve on the 6010 is very basic:

10' @ 0 rpm
13' @ 900
36' @ 3000

Sound about right?

Trying to get it to the track in 2 days for the last open weekend of the season, HELP!

SN-95

Checked compression, 160-180 across all cylinders. Also just put new plugs in

S10xGN

iTrader: (11)

Open headers won't cause a misfire. And the plugs looked?

SN-95

Well ive got a wideband hooked up, and it was all over the place, thats what really made him mention it. The first set of plugs where extremely dark, cleaned them, put them back, then the same thing. But that was before i messed with the timing much. I just adjusted the floats, and changed the timing down low and it helped a little bit. The motor has sat for awhile, I think we are going to try the old seafoam treatment. The a/f has settled down alot now

ZONES89RS

iTrader: (25)

What does the wide band do when it has the said miss?

SN-95

Doesnt seem to be very consistant, but a little lean. But the plugs were black when we pulled them out. It seems to get a little better everytime I drive it. I also set the timing a little more aggressive from idle to 2000 and that seemed to help. Ive been looking for another carb to throw on and try out to see if that would help. I had a guy go through it and he said everything looked good, but it cant hurt to try.