4d55 started misfiring and smoking horrendously

[geezer101]

Is there any way of determining the turbo is the culprit by hooking up a boost gauge and checking boost levels? I have no knowledge on TD or diesels in general but if the turbo is shot it would explain the loss of power and coughing smoke by sucking oil through the seal.

[huff]

Is there any way of determining the turbo is the culprit by hooking up a boost gauge and checking boost levels? I have no knowledge on TD or diesels in general but if the turbo is shot it would explain the loss of power and coughing smoke by sucking oil through the seal.

That sounds like it makes sense. But what if it isn't producing boost because the exhaust pressure is weak, and if that in turn was caused by something different (like bad timing?)?

So I think it is a definite thing to measure... it would give us more data, but I don't know it would determine absolutely.....




I was re-reading what Clouse said, about the smoking getting worse after adding a fuel additive.... if the turbo was the cause, then why would that happen? So now I am leaning more to it being an IP problem.