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Here's the particulars: The engine will not rev above idle speed. It has a 0343 error code that I have not been able to clear. The wiring has been checked per the on-line service manual, plus I have tried two different cam sensors. The cam has the pin at the back of the cam. If you try to rev it very slowly you can get the RPM's to go up, but if you rev it to fast it will die and then it won't start for several hours. This one is stumping me, please help!
Additional info: I put my oscilloscope on the camshaft position sensor out put and the waveform looks like the picture I uploaded. I also checked the waveform on crankshaft position sensor and it looked good. I also connected my timing light to the plug closest to the front of the engine and checked the spark timing. I could not see the timing mark on the crankshaft pulley to determine what the spark advance was set at. Is it possible that the crankshaft timing ring has moved and now the timing is off? Looking for some opinions. Thanks!
Latest update, I checked the camshaft timing and it is spot on. I have also determined that the timing is advanced too far. I would guess it to be about 30 to 36 degrees before top dead center. Does anyone know anything about the tone ring that the crankshaft position sensor uses to determine spark timing? Is it possible that the tone ring has shifted and is causing the timing to be too far advanced? I need some help from a Kia expert. Thanks.
I hate it on these forums when someone has a problem and then doesn't follow-up with what was the ultimate solution. That being said, my problem was the crankshaft keyway slot. Some bozo before me didn't tighten the crankshaft bolt properly when they changed out the timing belt and now the keyway slot has a chunk missing out of it. The damaged keyway allowed the crankshaft to advance ahead of the camshaft timing causing the engine to run like crap. Used engine or replacement crankshaft is the only way to fix this one. Damn!!!!!
Drives: Kia Sportage, Jeep Cherokee, Ford Explorer, Ford Mustang
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WOW, and thanks for following up with us. I agree about users not letting everyone know what there final outcome or solution was, or even that they haven't found one and still have the problem.
That is a shame about the busted up keyway slot. Since your choices seem to be limited to some very expensive repair options, are you going to consider some last resort measures like drilling and pinning the timing gear to the crank shaft?
Here's a tip from the Miata crowd. There is a product made by Loctite called Loctite 660. You won't find it at AutoZone. You have to order it from an Industrial supply house. I bought a new crank sprocket, key and crank bolt. Install the new key into the damaged keyway area with the Loctite 660 filling the void left in the damaged area on the crank. Install the sprocket and tighten the crank bolt to the proper torque spec. Let the engine set for at least 24 hours and then re-assemble the rest of the engine. The clamping force of the crank bolt keeps the sprocket from turning, not the key in the slot. If the repair holds, you have just dodged some expensive repairs.
I will report back how my repair is holding up when I finish up later this week.
99 DOHC Sportage Will Not Rev
Linear Mode
