Timing issues,runs but poorly

[rallylife69]

when i set #1 @ TDC....the timing mark is aprox. 90 degrees out from the 0 degree mark on the crank......i assume the harmonic balancer is defective???

am i correct???or is there adjusment like the cam timing and its in the wrong position?

what degree of advance should i use for the ignition timing?

the engine block casting # is F54 followed by a 0701A, s/n is L28 513794

the head casting number is P90

the computer is A11 or All-604 420/ L28 / 8Z13

the engine does have a turbo also

Is there a way for me to find 0 degrees on the crank without pullin the front cover....ie, is there a key way that is at 0 degrees

Thanks,

Ed G

[rallylife69]

are these l28 engines internally or externally balanced?

[ktm]

The woodruff keyway should be at the 12 o'clock position at TDC. This is not the definitive method of determining TDC, but it is one of the indicators to check when verifying TDC on a rebuild.

You mean that the timing mark on the crank is approximately 90 degrees out from the indictor. Your woodruff key may be missing which has allowed the damper to rotate.