P0300 Only. Will Run Fairly Smooth at 3k RPM, but not below 2k RPMs

[Curt Gobbell]

Problem fixed

Cause - broken valve spring on #5 intake

Solution - spent $600 on parts, pulled the heads and did a complete valve job this weekend.

Runs like a champ now.

Local shop wanted $2100 to replace the springs on the driver side only

 

[Curt Gobbell]

BTW i got lucky. The pistin kissed the valve, but the valve wasnt bent