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'97 F350 7.3L running bad.

1372 Views 5 Replies 4 Participants Last post by  Kimber1911
Need help. Truck started missing and smoking. Have put new injectors, uvch's, cps,icp,ipr. It will run but still missing and smoking and the check engine light and codes say icp high, and high to low on cylinders 1,2,&7. What is my next step in getting this truck running good again. Thanks.
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The ICP can be biased where it REPORTS a too high number which is false. The computer respond by lowering the IPR duty cycle but the value won't come down so it throws a code. It runs bad because the IC pressure is actually lower than required as the PCM has dropped the duty cycle.
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