Mitsubishi GTO 3000GT Z15A Hunting on Acceleration

1991 Mitsubishi GTO Z15A Engine Model 6G72

Situation
When I pressed harder on the accelrator ,The engine speed did not get high smoothly with hunting,
when I shifted in seconds from 3000rpm. Idles was properly.

Cause
Faulty Ignition coils.

Maintenance
It did not work properly after I cheked spark plugs , HT leads ,air flow meter and air cleaner.
Althogh I cleaned the throttle body.
Then I checked the ignition coils and found that there were cracks on the base of coils and leaked from it.
I exchanged new ignition coils.
After that the engine speed got high smoothly.

Toyota Hilux Surf RZN185 Idles Erratically

2000 Toyota Hilux Surf RZN185W Engine Model 3RZ-FE

Situation
The engine did not run smoothly at an idle.

Cause
Faulty Air flow Meter

Maintenance
Diagnosis noticed that card 31 it was faulty of the air flow meter.
Then I took off it and cleaned. but It worked worse than befor.
After that I judged that the air flow meter was faulty.
The engine run smoothly after I changed a new air flow meter.

Toyota Chaser GX100 E/G Stall

1997 Toyota Chaser GX100 Engine Model 1G-FE

Situation
The engine stalled at an idle.

Cause
Faulty ISCV (idling speed control valve).

Maintenance
Diagnosis and fuel compression were properly.
The engine speed got high smoothly.
I thought that ISCV was faulty and checked it.
It worked properly but the head of the ISCV was dirty with sludge.
Then I cleaned it .
After that It worked properly.

Nissan March Micra AK12 OD Switch Not Put on

2004 Nissan March AK12 Engine Model CR12

Situation
It couldn't be put on the Over Drive switch and not iluminated.

Cause
Disconnecting wiring in the selector lever.

Maintenance
I disassemble the selector lever.
Then I repaired the wiring.
After that it could be put on the over drive switch.

Toyota Corona ST190 ABS Lamp Lit

1994 Toyota Corona ST190

Situation
ABS warning light iluminated.

Cause
Faulty front right Speed sensor

Maintenance
Diagnosis noticed that the front right speed sensor was faulty.
When I measured voltage of the sensor, it was out of average level.
Then I exchanged new speed sensor.
After that it worked properly.

Toyota Carina AT211 E/G Hesitate on Accelration

1996 Toyota Carina AT211 Engine Model 7A-FE

Situation
The engine speed did not get high smoothly with hunting.

Cause
Faulty Ignition coils

Maintenance
At first I changed new spark plugs and new HT leads.
Then the engine worked properly on a temporarily.
After 1 month it happend again.
This engine was used concurrently ignition coils system.
So I judged that sparks were leaking in the ignition coils.
I exchanged new ignition coils.

Mazda RX-7 FD3S ABS Lamp Lit

1999 Mazda RX-7 FD3S

Situation
ABS warning light illuminated.

Cause
Disconnecting front left decompression solenoid valve in the ABS hydro unit.

Maintenance
Diagnosis noticed cord24 that was fault of the front left decompression valve.
Then I looked into it by service manual.
Firstly I pulled off valve relay and checked electric continuity.
One of the cable was infinite.
I judged that this was the cause.
Thean I changed a new ABS hydro unit.
After that it worked properly.