I'm needing to do the same checking on this. Got the P0400 EGR code. I have been very bad and literally only driven it maybe 5 times for 100 miles in the past, oops 8 months or so.

Must check the vacuum first. Then I really need to get the rest of the o-rings changed to viton, seems like the IP is taking a bath in fuel just sitting there.

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raMBow

1999 E300DT Obsydian Black Metallic, Heated Full Leather Parchment options, E2, K2, 136,000+, best 36.5 mpg - GP's 12-04 & 11-12 Zero Stuck
2010 Honda Odyssey - The BrideMobile - best 26.5
(2) 2005 Honday Accord- (1 -Corporate 1 - Personal) - 110,000 4-cyl 30mpg
2000 VW Golf GLS TDI, Upsolute Chip (sold to Brother, now 300+k on it) 48.5 mpg like clock work
1987 Honda CRX HF - Sold 87,000 always over 50 mpg Max 67 mpg