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1989 7.3 idi thumping from intake
It's definitely super loud with the cover off and very concentrated in the intake manifold. I am going to spend some time on it this weekend and I will definitely check out the CDR, I haven't done that yet. I am actually super curious about the vacuum pump, you're the first person to mention...- VIK1NG
- Post #7
- Forum: 6.9L IH & 7.3L IDI Diesels
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1989 7.3 idi thumping from intake
If it were a timing or lifter issue, wouldn't it be more constant and consistent? Instead of only happening after running at high RPMs for a time? Like, if I drive around town it won't do this, only on the freeway or up a big hill.. if I drive it for 10 minutes in neighborhood or town...- VIK1NG
- Post #5
- Forum: 6.9L IH & 7.3L IDI Diesels
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1989 7.3 idi thumping from intake
I have always been under the impression that this era F Series still ran OBD-1, this is reinforced by the fact that I literally have a "Check Engine" light on my dash, that being said I have never cared to try and read a code from it because the CEL on this truck only relates to coolant temp and...- VIK1NG
- Post #4
- Forum: 6.9L IH & 7.3L IDI Diesels
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1989 7.3 idi thumping from intake
Hey guys, I've been lurking through these threads for years and gotten so much good info. Many thanks for that! My issues have gotten too specific so I'm asking on my own now; I've had this f350 for a couple years now and it's been parked for the better part of 9 months while I've messed with...- VIK1NG
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- Replies: 10
- Forum: 6.9L IH & 7.3L IDI Diesels
