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[Datsun 1200 encyclopedia]

Engine Trouble Diagnosis

(Difference between revisions)

Datsun 1200 encyclopedia | Recent changes | Switch to MediaWiki mode

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Category: Emission Control And Tune-Up

Revision as of 18:30, 11 December 2006
Mildman (Talk | contribs)

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Revision as of 18:32, 11 December 2006
Ddgonzal (Talk | contribs)
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Line 1: Line 1:
-1. engine will not start by normal cranking:+= Engine Will Not Start =
 + 
 +== but cranks normally ==
possible cause -remedy possible cause -remedy
Line 30: Line 32:
-2. engine will not start - weak or erratic cranking.+== weak or erratic cranking ==
(a)weak or faulty battery. -recharge or renew battery. (a)weak or faulty battery. -recharge or renew battery.
Line 39: Line 41:
-3.engine stalls+= Engine Stalls =
(a)idling speed set to low -readjustidling speed stop screw (a)idling speed set to low -readjustidling speed stop screw

Revision as of 18:32, 11 December 2006

Contents

Engine Will Not Start

but cranks normally

possible cause -remedy

(a)dirty or corroded distributor points. -clean or renew and adjust points

(b)carburettor flooding -check needle valve and float, clean out fuel system

(c)moisture on high tension wire and/or inside distributer cap. -dry out high tension wires and cap

(d)dirt or water in carburettor or fuel system. -clean out carburettor and fuel system

(e)incorrectly set spark plug gaps. -reset spark plug gaps to specification

Verify spark is strong enough to jump in the cylinder. Rare failures will produce a spark when the plug is grounded outside the engine, but won't jump under higher cylinder pressures.

(f)faulty coil or capicitor. -test and renew faulty components.

(g)faulty high or low tension wires. -test and renew faulty wires.

(h)fuel vapor lock. -check source of vapor lock and insulate against heat.

(i)faulty fuel pump. -test and overhaul fuel pump.

(j)incorrectly set ignition timing. -check and retime ignition.

(k)broken or short-cicuited low tension lead to distributer points. -test and renew lead.


weak or erratic cranking

(a)weak or faulty battery. -recharge or renew battery.

(b)fault in starter lead or solenoid. -test and renew faulty components.

(c)faulty starter. -test and overhaul starter.


Engine Stalls

(a)idling speed set to low -readjustidling speed stop screw

(b)idling mixture to rich or lean -readjust idling mixture screw and idling speed screw