What is the ignition timing spec on this 1986 Ford 7.5L emissions label?

8° BTDC at 800 RPM max for both manual and automatic transmissions, set with the distributor vacuum hose disconnected and plugged and the transmission in neutral, then reconnect the vacuum hose.

What spark plug and gap does this label specify?

Spark plug ASF-42 with a gap of .042–.046.

What are the curb idle RPM settings?

Manual transmission: 800 RPM in neutral. Automatic transmission: 650 RPM in drive. Dashpot clearance should be adjusted to 2.2–2.9 mm.

What are the fast idle settings?

Manual transmission: 2200 RPM on the highest step of the fast idle cam. Automatic transmission: 1600 RPM on the second step. The EGR valve vacuum hose is disconnected and plugged during adjustment.

Is this engine catalyst-equipped?

No. The label is marked NON-CATALYST and states the engine conforms to U.S. EPA regulations applicable to 1986 model year new heavy-duty engines.

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1986 Ford 7.5L Non-Catalyst Emissions Decal - Vacuum Routing & Tune-Up Specs

Ford Important Engine Information Emission Decal with Timing Specs and Vacuum Hose Routing

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Underhood VECI emission label (non-catalyst) with ignition timing, fast/curb idle specs and vacuum hose routing diagram for a 1985 heavy-duty engine.

AI caption April 2007 · Photo 143 of 215

This is a scanned Ford Motor Company "Important Engine Information" underhood emissions/tune-up decal (calibration label E6AE-9C485-ADT) for a 7.5L heavy-duty carbureted engine, marked NON-CATALYST and stating it conforms to U.S. EPA regulations for 1986 model year new heavy-duty engines. The left portion gives complete tune-up procedures: ignition timing of 8° BTDC at 800 RPM max for both manual and automatic transmissions (with distributor vacuum hose disconnected and plugged, transmission in neutral); fast idle settings of 2200 RPM (manual, highest cam step) and 1600 RPM (automatic, second step); curb idle of 800 RPM in neutral (manual) or 650 RPM in drive (automatic); dashpot clearance of 2.2–2.9 mm; and spark plug ASF-42 gapped at .042–.046 inch. The label also notes 7.5L EGR/AIP calibration (6.1/7.0/7.5E) and refers readers to the shop manual for choke and idle mixture adjustment. The right half is a color-coded vacuum hose routing diagram showing components including the BPV, air cleaner bi-metal, PCV, EGR valve, VCBV, VDV, IVV, carburetor bowl/spark vents, purge control valve, vacuum check valves, distributor, vacuum restrictor, and lines to the fuel tanks. A torn/damaged section obscures part of the diagram's lower area.

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Frequently asked questions

What is the ignition timing spec on this 1986 Ford 7.5L emissions label?: 8° BTDC at 800 RPM max for both manual and automatic transmissions, set with the distributor vacuum hose disconnected and plugged and the transmission in neutral, then reconnect the vacuum hose.
What spark plug and gap does this label specify?: Spark plug ASF-42 with a gap of .042–.046.
What are the curb idle RPM settings?: Manual transmission: 800 RPM in neutral. Automatic transmission: 650 RPM in drive. Dashpot clearance should be adjusted to 2.2–2.9 mm.
What are the fast idle settings?: Manual transmission: 2200 RPM on the highest step of the fast idle cam. Automatic transmission: 1600 RPM on the second step. The EGR valve vacuum hose is disconnected and plugged during adjustment.
Is this engine catalyst-equipped?: No. The label is marked NON-CATALYST and states the engine conforms to U.S. EPA regulations applicable to 1986 model year new heavy-duty engines.