2000 Daewoo Leganza Crank positioning sensor problem.

SPAZDACAMPER

MEMBER
2000 DAEWOO LEGANZA

Computer problem
2000 Daewoo Leganza 4 cyl Front Wheel Drive Manual

Hi. I have a 2000, Daewoo, Leganza, with a 2.2L DOHC, manual front wheel drive transmission. I had a head gasket leak so I replaced it got every thing hooked back up properly. I have had 3 ASE certified tech check out my work and timing from the crank to the cams and all agree that is dead on. We checked and double checked all the wiring harnesses, grounds, and vacume/fule lines every thing is hooked up properly. But when we tri to start the car it acts like its trying to start and if you go wide open throttle the engine will start for like 2 seconds and backfire out the intake manifold. The engine is showing all the common signs of crossed wires but we have checked the wiring on the plug order as well. So we looked on our online data base and found two pages one saying the crank sensor will auto pick up and know when the firs piston is at top and ready to fire the second page says you need a $1,000 scan tool especially designed for Daewoo. It says the scan tool has a setting to reset the timing on the ignition coils and resync it with the pistons firing order. We have tried a tech 2 from GM and the car is not supported on our scan tool. So I was wondering if any one has any good ideas or knows how to get around this problem without a scan tool or maybe a way to trick the computer.

Thanks Jake

1 Reply

YOBOBYO

MEMBER
17 POSTS

Doesn't look like anyone wants to touch this one. But I'll give it a try. I've replaced a couple of head gaskets already on these cars, and so far I haven't had any problem where the computer lost time or something. That just doesn't sound right.
If you have the wire set right and the timing mark are on the money, then there is only a couple of thing that would cause the back fire. 1) You have a bent valve. Or 2) you didn't installed the cam gears right. You have the intake and exhaust switched. I'm not sure if this would cause any perminent damage. It would just open the wrong set of valve at the wrong time. You'll have to remove the bolts and washer holding the cam gears, and make sure you have the intake to the left, (towards the back fire wall) and the exhaust to the right (front of the car) The cams and the gears are the same. It's just on how you install and set the gears. The cam gear has a notch to set it as the intake or exhaust. Make sure these are installed right.
It's the only thing I can think that could of gone wrong.

Good luck!

Robert