I took my car to Motor City Speed for a dyno tune. I ran into a few issues with the car.


Two cylinders 1 and 4 are not fireing at low RPM and another cylinder is weak.
The pipes are not even getting hot. I have no SES light.

I think it may be a optispark issue. It is a vented MSD unit with about 15000-20000 miles on it.

The Dyno is not showing a miss up top and has not rolled over even at 6700 RPM, but the numbers are not good.

350 WHP and 315 WTQ, on a mustang dyno.


We are also hearing a noise in the front of the motor that is Intermittent, a scope is suggesting the Opti or under the timing cover.

 

So i have an update,

The miss was be caused by 2 injectors not being seated.

The noise is still in the front of the motor and the opti spark has a strong spark.

The noise gets better with the accessory belt off. All things spin freely. Im thinking the balancer is not seated against the crank key since i can keep tighting it past where it should be. Im going to buy an ATI super dampner and check the key.

 

Are you still taking her to Ignace this weekend?

 

Heck yea i am, even if i have to hook my John Deere too it.