Question about Ford Ranger

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98 ranger 4,0 very hard to crank when it does it runs very rough for a couple of min then levels out but does not have the power it should

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I'm not sure what you mean by being hard to crank. If you mean that the starter motor battles to turn over the engine it may be you have a flat battery. Otherwise if the engine itself is stiff to turn it may be much more serious. You can check this by taking out the spark plugs and putting the gearbox in neutral. You should then be able to turn the engine by hand by rotating the fan belt pulley.

If the engine is simply hard to start (requires a lot of cranking) and runs rough you may have an ignition timing problem. Check your ignition timing with a timing light. and take out and clean the spark plugs and set the plug gaps.

If your ignition is OK you may have a fuel supply problem. This will cause a drop in power. Commonly the engine will faulter if you accelerate hard. A common cause for a fuell supply problem is a blocked fuel filter. This is easy and cheap to replace so you may be lucky and this is your problem.

Posted on Oct 10, 2008


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