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Update : fixed the problem. Solution was to turn the whole MAF housing about 90 degrees. I belive the Maf sensor was picking up turbulence in the intake tube. I also reduced the gap on the plugs. Seems to run great so far. Thanks again

Sorry for bringing up a 3 year old thread from the dead... But please tell me if you found the problem!! This is the only thing i can find on the internet that has the same symptoms as me. hopefully you still use this account lol. Thanks

I gapped them somwhere near there. I'll check them again. I have a new coil I'm gonna test on it too. But how do you like your p's? What spring kit did you use ?

Well after injectors plug wires and playing with timing I still have a bad misfire. Hardly any power. I have noticed that it occurs much worse when the car gets warm. And will not do it while idling. Can messed up valve train do that? I mean I thought if it was a bad mechanical problem it would...

Little update: Got some reman flow tested injectors because I didnt like having old 175,000 mile injectors on a almost restored car. Got a Kirban ajd fpr and bumped up the fuel pressure a little ~43 psi. It helped a little with the bad miss but I tried changing around my plug wires because, upon...

Waiting on some good plug wires , and injectors before I start working on it. I will post the results because I hate it when threads end in no solution or update.

yeah I was just wondering that if I do happen to find a bad injector should I just go ahead and step it it up? but that's down the road right now... I was thinkin, if I have my wide band sensor mounted on the driver side and the wideband AFR goes lean during the misfire.. do you think that the...

Alright will do, I had to disconnect them recently right before these problems came up to paint the engine bay, So I will definitely have to take a look, thanks Jrichker

Yes, I have performed the cylinder balance test using the EEC, You know that sound during the test when the EEC turns off an injector to see how well that particular cylinder is contributing ? Thats exactly what is feels/ sounds like when driving the car under load. Except more pronounced...

Well my idle and cruise after warming up and is in closed loop, is around 14.7 and when you lightly accelerate( avoiding the missfire at half throttle) it stays around the 13.5 range which is just right. I haven't gone WOT much because im afraid of leaning out or detonating. No chip, reman a9l...

With a 308ci, ported GT40p heads, gt40 upper and lower, b303 cam, 70mm throttle body, 70mm maf (sn95), cold air intake and exhaust do you think the 19#'ers are getting pushed a little to close to their limit? Just wondering if I have a bad injector, I will probably replace the set because they...

Haha, I ran the KOEO and KOER coeds, just emissions codes. AFR is at 14.7 always or richer (perfect) other than when you give it half throttle and it misfires.

yeah they're brand new. I just recently got my wide band installed and I discovered that when the misfire happens , the gauge goes to 17. so it is probably fuel right ? I thought it was spark related too until I saw that.. heading towards injectors.

Little update : went back over my wiring and found that the #1 and #2 Injector wires were swapped. I verified by wire color. the car runs better but has a misfire still. It runs much better the more I advance the timing. how much timing is typical of the B cam? after I installed the wide band...

TPS tested fine , smooth transition from 0.97v to 4.7 volts. Gotta be fuel or a connection..

Going to go test it right now

Alright guys, I swapped in a new distributor and TFI with cap and rotor and got NO change. Set base timing to 10 degrees. At idle I see it jump around from 10 to 20 with he spout in depending on idle speed. Timing advances as throttle is increased. I will check out my TPS out again and my fuel...

Also the cam was installed dot to dot. and I burnt a plug wire but recently found a spare one to replace it

it only acts up under load. When the engine was first cranked it had idle surging but after a base idle reset it idles great. I will get home and check everything. Thanks for all the suggestions so far guys.

Yes when I reinstalled it I put #1 at tdc on the compression stroke and lined up the rotor for #1 then set base timing with engine running with spout out. I will most likely go back through the procedure again just to double check. The misfire is only present when you get about half throttle...