What is the ignition timing spec on this 1986 Ford 5.8L emissions label?

Disconnect and plug the distributor vacuum hose, and with the transmission in neutral adjust timing to 10° BTDC at 800 RPM max, then reconnect the hose.

What spark plug and gap does this label specify?

Spark plug ASF-32C with a gap of .042-.046.

What is the curb idle setting per this label?

With accessories off and hoses plugged at the TK and 'C', set 650 RPM in drive (575 RPM for vehicles with less than 100 miles), then set the throttle kicker to 800 RPM (725 RPM under 100 miles) with manifold vacuum applied.

What is the fast idle adjustment procedure?

Disconnect and plug the vacuum hose at the EGR valve and at 'C', put the fast idle screw on the highest step of the fast idle cam, and adjust to 2200 RPM in neutral (2000 RPM for an engine with less than 100 miles), then reconnect hoses.

What calibration/part number appears on this label?

E6AE-9C485-ACL, with engine family code GFM5.8T4GAF5-AIP/EGR/TWC and engine designation 5.8L-6JL, marked CATALYST.

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1986 Ford E-250 5.8L 351W 4V Vacuum Hose Routing & Emissions Decal Diagram

1986 Ford E-250 351W 4V VECI underhood emissions label with vacuum hose routing diagram

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Ford Important Vehicle Information (VECI) underhood decal for a 1986 E-250 351W 4V: timing/idle set procedures and vacuum hose routing schematic; base timing 10 BTDC.

AI caption October 2006 · Photo 59 of 126

This document is a scan of a Ford Motor Company underhood emissions/vehicle information decal, annotated by the uploader as coming from the hood of a 1986 E-250 with a 351W (5.8L) 4V H.O. engine. The left portion gives tune-up procedures: ignition timing (10° BTDC at 800 RPM max with distributor vacuum hose disconnected), fast idle adjustment (2200 RPM in neutral, 2000 RPM if under 100 miles), and curb idle adjustment (650 RPM in drive, 575 RPM under 100 miles; throttle kicker set to 800 RPM, 725 under 100 miles). It notes the vehicle conforms to 1986 model year U.S. EPA light duty truck regulations for use below 4000 feet. The bottom band lists the calibration/label number E6AE-9C485-ACL, CATALYST designation, spark plug ASF-32C gapped .042-.046, engine family 5.8L-6JL, and GFM5.8T4GAF5-AIP/EGR/TWC. The right side is a vacuum hose routing diagram showing components such as the A/CL DV, ACV, PCV, EGR valve, TVVs, carbon canister, purge control valves, distributor, throttle kicker, air BPV, heat valve, and A/C-only circuits, with connection points A, B, and C. Useful for restoring correct vacuum hose routing and idle/timing specs on a 1986 5.8L Ford truck/van.

This document covers 1986, which may differ from this 1979 Ford Bronco.

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Frequently asked questions

What is the ignition timing spec on this 1986 Ford 5.8L emissions label?: Disconnect and plug the distributor vacuum hose, and with the transmission in neutral adjust timing to 10° BTDC at 800 RPM max, then reconnect the hose.
What spark plug and gap does this label specify?: Spark plug ASF-32C with a gap of .042-.046.
What is the curb idle setting per this label?: With accessories off and hoses plugged at the TK and 'C', set 650 RPM in drive (575 RPM for vehicles with less than 100 miles), then set the throttle kicker to 800 RPM (725 RPM under 100 miles) with manifold vacuum applied.
What is the fast idle adjustment procedure?: Disconnect and plug the vacuum hose at the EGR valve and at 'C', put the fast idle screw on the highest step of the fast idle cam, and adjust to 2200 RPM in neutral (2000 RPM for an engine with less than 100 miles), then reconnect hoses.
What calibration/part number appears on this label?: E6AE-9C485-ACL, with engine family code GFM5.8T4GAF5-AIP/EGR/TWC and engine designation 5.8L-6JL, marked CATALYST.