I have a 2004 GLS Elantra that will not start.

ATSVOX523

MEMBER
2004 HYUNDAI ELANTRA
130,000 MILES

I got a code for the Cam sensor. I checked the voltage and the ohms and the sensor seems to be operating fine. I then had someone suggest that thetiming could be messed up. I took the cylinder head cover off, and noticed that there was a plastic piece of something in between the cam gear and timing chain. (This model is the DOHC with a timing belt to the crank, and a chain between both cams) I fished the plastic piece out, and I cannot figure out what it is. The car will crank sometimes, but only run for about 5-10 seconds before shutting off. I thought the plastic piece may be a guide of some sorts, but the only information on timing guides I can find if for the belt, not the chain. Any ideas?

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RASMATAZ

MECHANIC
75,992 POSTS

https://www.2carpros.com/articles/car-cranks-but-wont-start

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if okay-check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing