1988 Chevrolet S-10



January, 28, 2010 AT 7:22 PM

Electrical problem
1988 Chevy S-10 4 cyl Two Wheel Drive Manual 170000 miles

Does the distributor on an 88 2.5 s10 have to be installed in a certain way. Does the #1 wire have to be on a certain prong on the cap. It has the module in the distributor and the cap has a flat side because of that.


3 Answers



January, 29, 2010 AT 12:03 AM

This condition exists when the engine has been rotated with the distributor removed.

Install a new O-ring on the distributor housing.
Rotate the crankshaft to position the No. 1 cylinder on the TDC of it's compression stroke. This may be determined by inserting a rag into the No. 1 spark plug hole and slowly turn the engine crankshaft. When the timing mark on the crankshaft pulley aligns with the 0 mark on the timing scale and the rag is blown out by the compression, the No. 1 piston is at top-dead-center (TDC).

If you are unsure when TDC is reached, remove the valve cover and watch the rocker arms for the No. 1 cylinder. If the valves move as the crankshaft timing marker approaches the scale, the No. 1 cylinder is on its exhaust stroke. If the valves remain closed as the timing mark approaches the scale, then the No. 1 cylinder is approaching TDC of the compression stroke.

Turn the rotor so that it will point to the No. 1 terminal of the distributor cap.
Install the distributor into the engine block. It may be necessary to turn the rotor, a little in either direction, in order to engage the gears.
Tap the starter a few times to ensure that the oil pump shaft is mated to the distributor shaft.
Bring the engine to No. 1 TDC again and check to see that the rotor is indeed pointing toward the No. 1 terminal of the cap.
With the respective marks aligned, install the hold-down clamp and bolt finger-tight.



January, 30, 2010 AT 8:34 AM

Thanks for the input. It will help, but I need to know if the distributor cap is supposed to be marked for the #1 position.



January, 30, 2010 AT 2:38 PM

Is cap not marked?

firing order is below

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