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Message: [QUOTE="Marty, post: 384175, member: 602"] If it's flagrantly missing and white smoking I would tend to look at other things then the IPR. You really need to get a scanner on that thing. If it did not illuminate a CEL then more then likely it's not an UVCG issue. A buzz test / contribution test / reading of codes would tell us what is going on. Fuel pressure you need to know what it actually is, but more then likely that's not your problem. Get a scanner on the truck and report back. Key On Cranking Idle WOT ICP IPR Fuel Pres Codes: ? Buzz Test: ? Lets start there, if it's a dead miss and it continues, a contribution test has shown me where a broken rocker arm is in the past. Bent/Broken pushrod, rocker arm, etc can cause that. Let me know. [/QUOTE]

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