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Low power/MPG on 1990 166hp 7.3 IDI
Are there any known issues with the timing marks moving or slop in the gears causing less than accurate timing readings? It is a known problem with, for example, some domestic V8 gas engine dampers that when they get old, the rubber part will allow the outer part of the damper to slide a bit...- metermatch
- Post #21
- Forum: 6.9L IH & 7.3L IDI Diesels
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Low power/MPG on 1990 166hp 7.3 IDI
I don't think I was limited to 3200 rpm, or hit the governor. I just didn't want to over rev the motor. I believe the dyno operator revved the motor out to about 3600 rpm because when he floored it, it downshifted to 2nd gear before reving up, and I think power actually went to 131 hp at the...- metermatch
- Post #19
- Forum: 6.9L IH & 7.3L IDI Diesels
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Low power/MPG on 1990 166hp 7.3 IDI
In advancing the timing to 9 degrees, what am I looking for, in terms of sound, performance, or in EGT (I have EGT meter) to tell me that I have gone too far advanced on the timing? Thanks, Jeff- metermatch
- Post #8
- Forum: 6.9L IH & 7.3L IDI Diesels
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Low power/MPG on 1990 166hp 7.3 IDI
Just a thought on the injector timing: I noticed when timing the engine with the Ferret meter, the timing mark on the damper, aside from being hard to read, was dancing around a bit, perhaps ramdomly moving 1-2 degrees. Is this normal? I am used to gas engines having some amount of movement...- metermatch
- Post #7
- Forum: 6.9L IH & 7.3L IDI Diesels
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Low power/MPG on 1990 166hp 7.3 IDI
I don't think the rpm was limited to 3200. I just didn't want to overrev the motor. I believe the injection pump is the original one from day one. The 166hp rating is from the decal on the drivers side valve cover. Jeff- metermatch
- Post #6
- Forum: 6.9L IH & 7.3L IDI Diesels
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Low power/MPG on 1990 166hp 7.3 IDI
I have some questions about my 166hp 7.3 IDI diesel: Low power and low MPG. What is the difference between my 1990 166hp 7.3 IDI and all the other 7.3 NA diesels that are rated at 185hp? Can I cost effectively make mine 185hp? I need more power between 1600 rpm and 2300 rpm. I’m...- metermatch
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- Replies: 20
- Forum: 6.9L IH & 7.3L IDI Diesels
