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I have had a couple of issues quite recently.

1st of all the car started to stall mostly when I slowed down at the traffic lights. It's quite strange as the car would stall without any sign at all. I mean no shaking, chocking or jumping up an down. when it happens, it takes a bit of time to start the car. you need to hold the key for at least 4 to 5 seconds to restart the car.

I thought the fuel pump was playing up so I changed it. , I had a quick look at one of the spark plugs to see the condition and it seems like there is nothing wrong with it so I assume that others are pretty much the same.

The 2nd issue I had was a bit scary. I was on the freeway, doing 100km/h and all of a sudden the rpm went all the way down to zero and luckily all the way back to 3000rpm. However the car was stalled for a split second. I did shit my pants as you would imagine what might have happened.

I had a quick look at the air filter, Mass Air Flow Sensor, and throttle body. It seems like everything is ok.

Do you have any recommendations about what I should check or do to sort this issue out?

Your help is appreciated.

cheers

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Have you checked for ECU codes? Could be a crank/cam sensor. Clogged throttle body/ plenum can also cause idle issues, but shouldn't have caused the loss of power you had on the freeway.

research and check the earthing points / battery terminals.

Wasn't a car doing this on the fwy recently and turned out to be a loose terminal?

If you haven't cleaned out your plenum, the I suggest researching that too- I think that will be the cause of your stall. The throttle closes fully under decelleration, and then cracks back open at the lower rpms to maintain idle. If stuck up with the sticky shite that is so prevelent in DD motors, it won't open again properly and the motor will stall. You will need to perform throttle re-learning as part of that process.

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