07-14-2008, 02:26 PM
|
 |
CC Member
|
|
|
Join Date: Jun 2008
Location: park ridge,
il
Cobra Make, Engine: superformance,408 w with 93mm intercooled turbo
Posts: 43
|
|
Not Ranked
rough engine
I have a 408w with a large turbo. The engine is FI using MSD ignition and coil. The distributor is a stock Ford and I'm using a Fast sequential bank to bank ems. The injectors are 83 lb.The problem is only between 2000 and 3000 rpm. The engine misses and hesitates but you can push through it. The problem is that the rpm range is right at cruise in traffic.When cruising the engine is breaking up and popping a little. It's much more noticeable to me but I had a techie riding with me checking my ems with the laptop and he says all is good. I've changed the plugs and they showed a little rich but not bad. The A/F is right at 13.5. My gut says its ignition because the fuel pressure stays at 60 lbs and I can hear the pump.... it doesn't break up at all. Could it be an injector not spraying at the rpm or is that in the ems.... This condition is somewhat intermittent but I'd call it 80%. It also doesn't matter cold or hot.
Any thoughts will be appreciated.
|
Threaded Mode
