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Gary
Gary, Australia Car Mechanic
Category: Mitsubishi
Satisfied Customers: 744
Experience:  Senior Technician
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I have a Great Wall x240 10 model it has a dead spot when

Customer Question

Hi I have a Great Wall x240 10 model it has a dead spot when you put your foot down and jerks when u drive on hard acceleration. We have replaced the coil leads spark plugs new air filter and injectors tps and maf sensor. Fuel pump replaced. Before we replaced the crank it ran 98% better with minimal jerk but we replaced the crank sensor many recommended and now it runs horrible put old one back in. Still the same.coughs and splatters. Worse since we touched the crank
Submitted: 4 months ago.
Category: Mitsubishi
Expert:  Gary replied 4 months ago.

Hi there,

Does your X240 go on the beach, water crossings etc?

The crank sensor is prone to damage from foreign body entry into the bellhousing.

The aftermarket sensor is not a good match, the air gap is too large.

Gary

Customer: replied 4 months ago.
No does not go on the beach at all or in water. The old original CAS is a branded one the new one is non branded, have put old one back in and still same. Start idle fine just on acceleration
Expert:  Gary replied 4 months ago.

Ok, thanks for that.

Did you compare the crank angle sensors side by side when you swapped them?

It seems you have a problem here, that is not easily rectified.

I would examine the flywheel through the hole that the sensor goes into, while rotating the engine.

There may be some abnormality there.

Have you checked fuel pressure with a gauge while driving?

I've done this on problem cars, with a gauge taped to the windscreen.

Gary

Expert:  Gary replied 4 months ago.

Hello again,

Do you need any further help?

I hope my advice has been of assistance to you.

Kind regards

Gary