Question about 2000 Ford Focus

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Deisel heater plugs dashlight comes on flashing at the same time all revs are lost but engine will still tick over. to remedy you just have to switch off, restart and away it goes !!! until the next time!!! have had it on diagnostics, but no problem found. but cant hook it up to machine when its happening,as it always happens when your on the road..cant sus the link between heater plugs and revs

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Change the air flow meter.Heater plug light flashes to tell you you have a problem.Switching the car into limp mode.

Posted on Jul 20, 2009


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One Way to find out is get a spark plug wire pulse indicator (its actually pretty cheap). its a device that looks like a short pen with a scoop in it for laying spark plug wire into it. the spark from the coil has such a high voltage that not all of it can be contained. The Indicator actually uses that spark to make it flash in sequence of that one spark plug wire. Check each wire until it flashes in sequence of that "Ticking" sound... if you can get it in sync then the chances are high that it is the lifters. Then rev the engine lightly and see if it stays in sync. This rules out any strange noises coming from an alternator or a belt making that ticking noise. And if you do have a noisy lifter it doesnt mean its the end of your engine. You could put an oil additive with each oil change to "Soften" the impact which will also quiet the lifters more if it really bothers you. Some cars actually have noisy lifters when its due for an oil change(this could come in handy). i hope this helps you out a little bit.

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Engine knocking

Good news is - I don't think you need a new engine.

As there are many moving parts that could create a knocking sound, it usually needs careful inspection to identify where it is from.
I will give a list of some of the causes and remedies. Yours will probably be one of them, but unless I was there - it could be any.

Loose exhaust component (causes rattles and thumps) - replace parts or joints.
Loose Engine mounts - Engine will move about a lot more than normal - Replacement of mounts.
Fraying Belts - causes continual ticking or slapping - Replace belts and check tension.
Timing is off - bad running, lack of power, pre ignition or knocking at low revs. Check timing belt - Replace, Tune engine.
Cracked valve - slight misfire worse at low revs - Replacement valves.
Clutch Problems - Broken spring or loose bolt - Check clutch plate - replace clutch plates.
Older engines - often accompanying smoke -
Broken Piston ring - continual ticking or occasional misfire - Replace Piston rings
Worn Piston bearings - Piston Slap - Replacement of all piston bearings.

Transmission Problems (only heard when in gear or with clutch out) - Broken gear teeth or worn bearings - Replacement of Transmission or rebuild.

Some of these remedies require engine removal and strip down, others are a simpler fix.

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There should be a small wire harness on the inside of the driver side tow hook under the bumper. The chord is very short and has a cap over the plug. Just reach in and you'll find a black cable about 1/2" thick. There's another wire tapped into it that has the plug end.

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