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Difficult start engine up - Tahoe Chevrolet Cars & Trucks

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If engine starts better when gas pedal is slightly depressed, bad IAC. Otherwise, all tune up stuff.

Posted on Dec 01, 2014

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Engine timing point marks


There are no timing marks....it's computer controlled.

Mar 12, 2014 | Porsche Cayenne Cars & Trucks

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Hard to start the engine


Starting problem can be due to many reasons. Go through the following chart to troubleshoot the problem:
No initial combustion (Engine does not start)
1. ECM power source circuit.
2. Crankshaft position sensor.
3. Camshaft position sensor.
4. Ignition system.
5. Fuel pump control circuit.
6. ECM.
7. VC output circuit
Difficult to start with cold engine
1. Ignition system.
2. Spark plug.
3. Fuel pump control circuit.
4. Fuel Injectors.
5. Cylinder compression.
Difficult to start with warm engine
1. Fuel Injectors.
2. Ignition system.
3. Spark plug.
4. Fuel pump control circuit.

Sep 07, 2013 | Toyota Corolla Cars & Trucks

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Kevincraigjazzmanboy@yahoo.com hard to start cold engine is difficult to pick up rpms , will only rev to about 3500 4000 rpms , cuts , misses when it does so , also difficult to start like timing is off...


Engine is difficult to start when cold
  1. 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.
  2. Check the battery cable condition. Clean the battery terminals and replace corroded or damaged cables.
  3. Check the fuel system for proper operation. A fuel pump with insufficient fuel pressure or clogged injectors should be replaced.
  4. 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.
  5. Check for a failed coolant temperature sensor, and replace if out of specification.
  6. 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
  1. 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.
  2. Check for loose or deteriorated engine grounds and clean, tighten or replace as needed.
  3. 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.

Jan 06, 2011 | 1987 Mercedes-Benz 300-Class

1 Answer

99 isuzu trooper 3.0D difficult to start any morning when the engine is cold, when it does start it has a rough idle and sometimes cut out difficult to start again. both throttle sensors have been changed...


Engine is difficult to start when cold
  1. 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.
  2. Check the battery cable condition. Clean the battery terminals and replace corroded or damaged cables.
  3. Check the fuel system for proper operation. A fuel pump with insufficient fuel pressure or clogged injectors should be replaced.
  4. 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.
  5. Check for a failed coolant temperature sensor, and replace if out of specification.
  6. 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
  1. 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.
  2. Check for loose or deteriorated engine grounds and clean, tighten or replace as needed.
  3. 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.

Dec 19, 2010 | 1999 Isuzu Trooper

1 Answer

Peugeot 307 1.4 2002 does not start when engine is


Engine is difficult to start when cold
  1. 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.
  2. Check the battery cable condition. Clean the battery terminals and replace corroded or damaged cables.
  3. Check the fuel system for proper operation. A fuel pump with insufficient fuel pressure or clogged injectors should be replaced.
  4. 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.
  5. Check for a failed coolant temperature sensor, and replace if out of specification.
  6. 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
  1. 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.
  2. Check for loose or deteriorated engine grounds and clean, tighten or replace as needed.
  3. 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.

Jul 23, 2010 | 2005 Peugeot 405

1 Answer

Mitsubishi Montero sport difficult to start when engine is cold. After engine warms up it starts ok. What could be the problem on cold start? Thanks.


possible it could be coolant temp sensor it could think its warm and not supplying enough fuel check eng light on?

May 19, 2010 | 2002 Mitsubishi Montero Sport

1 Answer

Enging difficult to start foom cold


sounds like you may have some bad glowplugs. Does wait to start light come on and stay on for about 10 seconds? Could be relay issue also

Feb 27, 2010 | 2000 Jeep Grand Cherokee

1 Answer

92 mitsubishi libero, engine surges downward in cold air, when accelerator pushed engine suffocates. difficult starting cold.check engine light on when warm, runs fine in warm weather or city driving


DIFFICULT STARTING CAR IN COLD.WOULD BE A THERMO - TIME SWITCH.THE THERMO TIME SWITCH CONTROLS THE AMOUNT OF TIME THE COLD START VALVE IS HELD OPEN BY MEASURING THE COOLANT TEMPERATURE AND UTILIZING A TIME FUNCTION TO PREVENT AN OVER RICH CONDITION.THIS COULD BE MOST OF YOUR PROBLEM.BUT SCAN IT TO SEE WHAT PCM CODE YOU ARE GETTING.

Sep 07, 2009 | 1996 Mitsubishi Eclipse

1 Answer

Difficult to start again after warm up engine.


give the engine a minute or two to cool down before turning it off. This cool down period allows oil to circulate and cool down the bearings in the turbo. If you shut off the engine immediately after hard driving, the oil can gum up around the hot bearings and create problems down the road.
Hope this helps

Thanks for using Fixya
Have a nice day!

Mar 05, 2009 | 1995 Honda Civic

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