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My tachometer is so slow, 1995 ae100, Just cleaned my

Customer Question
Hello JA: Hello. What is your...
Hello
JA: Hello. What is your issue regarding?
Customer: My tachometer is so slow
JA: What is the model/year of your Toyota?
Customer: 1995 ae100
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: Just cleaned my distributor only. Nothing happend
JA: Anything else you want the mechanic to know before I connect you?
Customer: The car hasnt been used for 3months
Submitted: 1 year ago.Category: Toyota
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Answered in 3 minutes by:
11/1/2016
Toyota Mechanic: EricFromCT, Toyota Technician replied 1 year ago
EricFromCT
EricFromCT, Toyota Technician
Category: Toyota
Satisfied Customers: 4,229
Experience: ASE Advanced Level Certified, 17 years dealer experience
Verified

Hi. What engine is in your ae100?

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Customer reply replied 1 year ago
1.3 4e
Toyota Mechanic: EricFromCT, Toyota Technician replied 1 year ago

Ok thanks. Does the engine rev up like normal?

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Customer reply replied 1 year ago
The rev is normal. just the tachometer is lower and very slow to move
Toyota Mechanic: EricFromCT, Toyota Technician replied 1 year ago

Generally when the tach is moving slow, it indicates that the tach gauge itself is lazy and needs replacing.

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Customer reply replied 1 year ago
Havent used the car in 3 months. Any rusty components might have factor in? Replaced my radio those times. And my previous radio is connected to tach and volt
Customer reply replied 1 year ago
Any grounding that have been missed?
Toyota Mechanic: EricFromCT, Toyota Technician replied 1 year ago

A bad ground would cause various electrical issues. Rust on components would not cause that. Have you checked the charging system voltage?

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Customer reply replied 1 year ago
The alternator works fine. Just sometimes im hearing static noises on the radio when im revving up
Customer reply replied 1 year ago
Is it connected to the starter?
Toyota Mechanic: EricFromCT, Toyota Technician replied 1 year ago

The charging system should be checked for an overcharge condition. THe alternator can send out RF signals that can be heard through the radio. Also the battery ground and chassis grounds should be checked for tightness and for being clean.

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Toyota Mechanic: EricFromCT, Toyota Technician replied 1 year ago

Is what connected to the starter?

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Customer reply replied 1 year ago
Sometimes its ok i can get 750rpm idle reading. Sometimes its in 300rpm only. but same engine sound.I had a case also when i did rev up. The odometer gauge went up as well
Customer reply replied 1 year ago
Is the tach connected to the starter?
Toyota Mechanic: EricFromCT, Toyota Technician replied 1 year ago

No. That tachometer is connected to the ignition module. If the odometer went up also, then there is an instrument cluster problem.

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Customer reply replied 1 year ago
When i revved up, the tach goes up normally. but the speedometer needle went up as well.
Toyota Mechanic: EricFromCT, Toyota Technician replied 1 year ago

SOunds like you have a problem with the instrument cluster. But you should still check the battery chassis ground.

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Customer reply replied 1 year ago
I had already fixed the speedometer problem. its a loose connection at the sensor i think. It doesnt go up with the tach now. but it seems quite slow also
Customer reply replied 1 year ago
Where is the battery chassis ground located?
Toyota Mechanic: EricFromCT, Toyota Technician replied 1 year ago

It is connected to the battery negative cable. Follow the negative cable down to where it mounts to the chassis.

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Customer reply replied 1 year ago
its properly connected
Toyota Mechanic: EricFromCT, Toyota Technician replied 1 year ago

Ok. I think your tachometer may need replacement. But I will opt-out and another expert may have more info on this for you.

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Customer reply replied 1 year ago
By the way.. the tach reaches minimum normal at 750rpm when the engine is quite longer running. but it have difficulty going up to 2000rpm to 3000rpm
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EricFromCT
EricFromCT
EricFromCT, Toyota Technician
Category: Toyota
Satisfied Customers: 4,229
4,229 Satisfied Customers
Experience: ASE Advanced Level Certified, 17 years dealer experience

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