Runs rough when foot off gas pedal - Diesel Forum - TheDieselStop.com
7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

 
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post #1 of 1 (permalink) Old 12-29-2018, 07:42 PM Thread Starter
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Runs rough when foot off gas pedal

Hi,

My truck has been running rough intermittently, particularly when taking my foot off the gas. When I hear the boost kick in it goes away. You can really feel it through the gas pedal. I saw on another post for a 2001 Ford that it was the Fuel Pressure Regulator, but no posts on the IDI.

When I went over the pass today and the boost got up to 7 psi, it ran very rough. I lowered my speed and it went away. EGTs were fine.

I should add that on long straight aways cruising at 60/65 mph it feels rough intermittently too but its very obvious when taking foot off the gas.

Its a 91 7.3 IDI with a Banks Turbo.

Thank you for any advice on this.

1991 F-250 XL 7.3L IDI 4x4, Banks Sidewinder Turbo, Automatic E4OD, 3.55, Extended Cab, Long Bed, 3" Straight-Piped Exhaust, Hayden Transmission Cooler, Hughes Performance Deep Aluminum Trans Pan, Bilstein Shocks, 1994 Lance Squire 8000 Cabover
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