Viper

iTrader: (6)

When starting off, car feels like it's falling on it's face, but if I step through it, it's fine. I hope that's not detonation I'm stepping through; it's gone by 1800rpm.

Started yesterday real bad when I had the AC on, after sitting stuck in rush hour for 2 hours, bumper to bumper. I have 160 thermos and the fans programmed, but being a 99 needle it never moved off center.

I thought it was injectors so I swapped to 42lb's FORD's tonight, recalibrated the PCM and took it for a drive. Same problem. Put the car in SD mode to eliminate the MAF being the problem. Same problem only not as severe. I thought today perhaps a faulty coil pack ( intermittent ) but after searching tonight the symptoms don't match.

Motor is new , installed 6-18-05 , have about 600 miles on it. I had this same issue last year RIGHT before my motor let go. However the bogging/hesitation started real bad less than 100 miles ago, not as soon as I started the new motor. So I'm a little concerned now in resolving this so I can drive it.

Any ideas?

Billiumss

iTrader: (11)

John,

What are all your specs? Who's tuning your car??? What did you change from my tune?

PM me if you want...

Viper

iTrader: (6)

Specs in sig, I'm tuning the car. All we changed was injectors. I'm getting 15 degrees of knock when I take off at a light; NO knock ( ok, minimal, under 2 ) after that. So I think some exhaust is banging, even though I have poly motor mounts and trans mount, and torque arm mount. Maybe I could desensitize the knock sensors for take off only? Bottom line is that much knock is going to pull timing making it tough to take off right?

Billiumss

iTrader: (11)

Could be a knock sensor gone bad or a wire got pinched when you put the intake on.

Got your PM and email... We'll get this fixed somehow!!!