On a 1905 Chevy 5.7 liter truck is the check engine light supposed to come on when you disconnect the timing connector( tan & black wire)? I changed the ignition module and pickup in the distributor now when I disconnect set timing wire light comes on where it never did before

SOURCE: 1995 TOYOTA CORROLLA WOULD NOT FIRE

I have a 95 toyota corolla sedan. Put in new rebuilt engine, fired it up, it ran for 5 seconds, then quit...now i have no spark? what is it? I changed the igniter, still no spark

SOURCE: 1990 2500 Chevy PU with stalled engine, won't start

Have you checked the coil

SOURCE: 06 chevy impala v6 3.9 liter engine. Check engine

there is a large evaporative leak. keep away form ottozoo, they dont have the brain power to actually diagnose a light bulb., their job is to sell parts., if they sell you the wrong parts tough.Take it to a qualified repair shop that does a lot of GM work or the dealer.

SOURCE: timing on a 1990 Wrangler with a 4.2 liter

4.2L 6-Cylinder

1. Set parking brake. Shift automatic transmission to Park or manual transmission to Neutral. With A/C off, start engine and attain normal operating temperature.

2. With ignition OFF, connect an ignition timing light and a calibrated, expanded-scale tachometer.

3. Disconnect 4 " and 10 " Hg (CEC System) vacuum switch assembly wire connector (located at top of valve cover). Disconnect and plug distributor vacuum advance hose.

4. Start engine, increase engine speed to 1600 RPM and check ignition timing. Adjust timing to specification listed on Emission Control Information label (if necessary). Tighten distributor hold-down clamp and recheck ignition timing.

5. Turn engine off and remove timing light and tachometer. Connect No. 1 spark plug lead, if disconnected. Unplug and connect distributor vacuum advance hose. Connect vacuum switch assembly wire connector.

NOTE: If timing light has an adjustable advance control feature, turn control to OFF position.

Timing is set per the emissions tag under hood.

Jeffrey Turcotte

• 8991 Answers
• Posted on Mar 25, 2011

SOURCE: replaced distributor on my 1988

Hi, I have pasted the procedure below. Your spec is 0 degrees (right at TDC).

CHECKING AND ADJUSTMENT

HEI Systems

1. Start the engine and allow it to reach operating temperature. Stop the engine and connect the timing light to the No. 1 (left front) spark plug wire, at the plug or at the distributor cap. You can also use the No. 6 wire, if it is more convenient. Numbering is illustrated in this section.

1. Clean off the timing marks and mark the pulley or damper notch and timing scale with white chalk.
2. Disconnect and plug the vacuum line at the distributor on models with a carburetor. This is done to prevent any distributor vacuum advance. On fuel injected models, disengage the timing connector which comes out of the harness conduit next to the distributor, this will put the system in the bypass mode. Check the underhood emission sticker for any other hoses or wires which may need to be disconnected.
3. Start the engine and adjust the idle speed to that specified on the Underhood Emissions label. With automatic transmission, set the specified idle speed in Park. It will be too high, since it is normally (in most cases) adjusted in Drive. You can disconnect the idle solenoid, if any, to get the speed down. Otherwise, adjust the idle speed screw.

1. Aim the timing light at the pointer marks. Be careful not to touch the fan, because it may appear to be standing still. If the pulley or damper notch isn't aligned with the proper timing mark (see the Underhood Emissions label), the timing will have to be adjusted.

1. Loosen the distributor base clamp locknut. You can buy trick wrenches which make this task a lot easier.
2. Turn the distributor slowly to adjust the timing, holding it by the body and not the cap. Turn the distributor in the direction of rotor rotation to ******, and against the direction of rotation to advance.
3. Tighten the locknut. Check the timing again, in case the distributor moved slightly as you tightened it.
4. Reinstall the distributor vacuum line or the timing connector. Correct the idle speed.
5. Stop the engine and disconnect the timing light.