Fuel System & EFI
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Resource 'Starting an engine that has been sitting for an extended period'
Technical Corner MAINTENANCE, RENOVATIONS, AND MORE Starting an Engine That Has Been Sitting for an Extended Period Larry Weidner | 1978 Royale | Menomonie, Wisconsin The following is just my humble opinion. I offer this FYI. Your milage may vary. Over the last 15 yrs I have seen a number of people get into GMCing buying a GMC that has been sitting for a number of years. In several of those cases, they were able to get the GMC started, put it in gear and drive it home. Sometimes they...- Christo
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Resource 'GMC Motorhome Tire & Wheel Information'
Wheels OEM (Factory) Steel Wheels Firestone Accu-Ride / Accuride Size: 16.5" x 6" Interesting article about the oddball wheel diameter Weight: ~40 lbs. Part #27995 (GM #359402) or 27725 Used from VIN #TZE165V101674 (mid-1975) onward For radial tires 85 PSI max Part number and ® (circled R) or "Radial" stamped on inside of wheel near valve stem Part #27604 (OBSOLETE) For bias ply tires ONLY. Do not use with radial tires. Part number stamped on outside of wheel between two lug holes...- Christo
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EFI parameters used on GM based EFI systems
Source files to add the Winlog-EBL dash to a windows PC for monitoring the EBL throttle body ECM.
Howell EFI installation by Richard Waters
2025-07-29
An excellent detailed document on installating a Howell EFI kit.
Embedded Lockers Flash What's Up Display
2025-05-22
Instructions for the What's Up Display for the EBL
Contains info on fueling parameters and Eprom addresses
EBL Flash ECM final firmware update Ver 2.7
2025-04-02
This is the final firmware update RobR put out for the EBL Flash ECM (Note: Requires WUD 3.1)
Wiring diagrams for EBL based 7747 engine control module
Adding a separate second filler vent line for the front tank for a better refuelling experience.
This TunerPro XDF file has additional Help descriptions of terms.
Advantages of the EBL add-on to the Howell (or GM Throttle Body) system
Intalling an 80's GM Throttle Body EFI system on a GMC Motorhome
Practical Guide for installation of an 80's GM throttle body EFI system with the EBL add-on.
Great Gas Tank Mystery
2019-11-26
Great information as to why the fuel system does what it does.
