[Guest]

i bought a 91 commanche last fall, as a winter project..the motor ran only on 5 cyl. i gave it a compresson test [0-145-150-145-140-150] so i pulled the head ..right # 1 piston .so i just finshed installing a new piston... now it runs on 6 except it shakes or miss fires as it idles..could this be an injector problem..?? could this be the reason it blew a piston???...thanks for any help....john

 

[2661]

Have you check the timing by chance?

 

[Guest]

When in doubt, have the injectors cleaned. Best place I found is Cruzin Performance. Excellent work, good prices. I think its cruzinperformance.com. He had mine back to me within a week, complete with flow results and an ID # engraved on each injector for future reference. I would also check your wires and replace as needed, cheap enough to do.