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Expert
251 Answers
- Posted on Jun 07, 2011
Re: 99 isuzu trooper 3.0D difficult to start any morning...
Engine is difficult to start when cold
- Check the battery condition, battery state of
charge and starter motor current draw. Replace the battery if marginal
and the starter motor if the current draw is beyond specification.
- Check the battery cable condition. Clean the battery terminals and replace corroded or damaged cables.
- Check the fuel system for proper operation. A
fuel pump with insufficient fuel pressure or clogged injectors should
be replaced.
- Check the engine's tune-up status. Note the
tune-up specifications and check for items such as severely worn spark
plugs; adjust or replace as needed. On vehicles with manually
adjusted valve clearances, check for tight valves and adjust to
specification.
- Check for a failed coolant temperature sensor, and replace if out of specification.
- heck the operation of the engine management systems for fuel and ignition; repair or replace failed components as necessary.
Engine is difficult to start when hot
- Check the air filter and air
intake system. Replace the air filter if it is dirty or contaminated.
Check the fresh air intake system for restrictions or blockage.
- Check for loose or deteriorated engine grounds and clean, tighten or replace as needed.
- Check for needed maintenance.
Inspect tune-up and service related items such as spark plugs and
engine oil condition, and check the operation of the engine fuel and
ignition management system.
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