Before the initial start, disconnect the fuel injector harness and verify at least, the first four cylinders in the firing order using a timing light.
If your cylinders are firing in 90° intervals BUT in the wrong sequence, the coil harness is connected wrong (at the ECU or at the coil packs).
Hopefully you have a fully degreed balancer or at least markings every 90°:
1st cylinder, in firing order, should fire at 0° (or 15° - add whatever your cranking timing is)
2nd cylinder, in firing order, should fire at 270° (or 285° - cranking timing added)
3rd cylinder, in firing order, should fire at 180° (or 195° - cranking timing added)
4th cylinder, in firing order, should fire at 90° (or 105° - cranking timing added)
5th cylinder, in firing order, should fire at 0° (or 15° - cranking timing added)
6th cylinder, in firing order, should fire at 270° (or 285° - cranking timing added)
7th cylinder, in firing order, should fire at 180° (or 195° - cranking timing added)
8th cylinder, in firing order, should fire at 90° (or 105° - cranking timing added)
The following information is only if you decide to put timing marks on the damper (#1 cylinder TDC identification & 30° example):
If necessary, use a spark plug hole type piston stop & degree wheel to first establish TDC, then make a damper mark at 30°.
FYI: This procedure can also be used to correctly install/position a crank trigger kit/cam sync unit at 60°, 180°, 195°, etc. (LINK).
If using spark plug type piston stop, some people remove rocker arms from #1 cylinder to avoid the risk of valves contacting tool.
Also, remove all spark plugs for easy turning force (no compression) to prevent damage from harsh piston-to-tool contact.
There's nothing wrong with installing a timing tape. Just ensure it's the correct one for your diameter damper.
You don't necessarily need a timing tape, because both timing synchronizations can be performed with one timing mark.
Multiply the damper diameter by 3.14159 (Pi), then divide by 360°. The answer is the distance in inches for one degree.
For a 30° timing mark, multiply this value by 30. Cut out this distance on a strip of paper to avoid a straight line measurement. |
May God's grace bless you in the Lord Jesus Christ.
'92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.