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Old 07-01-2013, 11:02 AM   #1
jlaws1990
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Question Speedometer works but jumps to speed

The speedometer on my 2001 Focus 5spd jumps up and down in speed rather than rising or declining. It jumps to the correct speed but freezes there until I go five iver or five under what its reading then it will jump down or up 5mph to the corresponding speed. I was thinking speed sensor. But I do not know for sure, maybe the cable?

Also if im parked with my car running it shakes really bad and sometimes boggs down and idles so low it almost dies. Any ideas? Maybe timing is off


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Old 07-01-2013, 11:58 AM   #2
BC_ZX3
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What cable? Cable driven speedometers haven't been used on cars in years.

Common idle problem causes on the Focus are vacuum leaks, malfunctioning IAC valves and lack of regular maintenance ( plugs, plug wires, fuel and air filter and PCV changes, etc). A faulty engine mount can cause excessive shaking.

If you have a high mileage SPI engined Focus, a compression check on a car that consistently runs poorly would be in order.

Timing seldom goes "off"; the timing belt either breaks or sheds its teeth. It usualy disables the car.
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Old 07-03-2013, 07:38 PM   #3
jlaws1990
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Just talked to the mechanic he said I need new seals and gaskets on my motor=$2100
He also said buying a 70, 000 mile engine and installing it would be $2000
$100 cheaper than him fixing it. :'(
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Old 07-03-2013, 08:37 PM   #4
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"""Also if im parked with my car running it shakes really bad and sometimes boggs down and idles so low it almost dies."""

I had a 2004 Zetec automatic and it did just that--it was the motor mounts

If you have a SPI engine sticking in a 70,000 mile SPI engine is a bad bet- valve seat drop issue
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Old 07-04-2013, 05:21 AM   #5
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All 3 of mine 'need new seals and gaskets', like 5 years ago. Man you need to dump that mechanic, nobody does 'seals and gaskets only' on an engine, or, incompetent.

Motor mounts make motor shake but cannot make it idle low, if truly doing so. Now if misconstrued, yes, or the usual excellent use of the english language around here.

Speedo issue could be the gauge itself.
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