20 Most Recent 2004 Hyundai Elantra - Page 5 Questions & Answers

What are the codes?

The sensor for the gauge could be faulty.The thermostat could also be faulty, there is a small window between the thermostat opening at 195 and the coolant boiling at 220.

Do a compression test or cylinder leakage test to check if the head gasket is blown. Looks like it blew on the water side. Or it could be that it overheated so badly that it could have collapsed the rings.. But if its not turning over means water got into the cylinders and seized up the piston. Remove the plugs and have a looks with bore scope for water ingress

YES

Sounds like a clutch release problem since engine speed should have no effect on your ability to shift into gear once the clutch is depressed. But there are other possibilities, personally I would start by inspecting (and replacing if necessary) the clutch throw out bearing and clutch pressure plate. If they're both within spec then inspect the shift fork. If you have to go any further than that your looking at having to replace synchros inside the transmission. 90 percent of the time just replacing the throw out bearing will do the trick. Personally depending on mileage I would replace the whole clutch assembly since its a fair amount of work just to access the clutch bearings and once your there the entire assembly is accessible

There is an interlock switch installed on the bottom of the shift lever underneath the trim. this needs to be adjusted .

Sounds like it needs a battery. I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

IS THE TRANSMISSION FLUID SMELL STRANGE?IF IT IS SO CHANGE CHANGE IT, AND AFTER IF NECESSARY CHECK THE XMISSION.

Define idles high like its going high rpms before shifting or the engine itself is high reving if its high rpming when shifting its mostly you tranny going out you can try tranny fix oil I used it on my truck when it had shifting problems and ive had no problems since it takes a few days to work though and if its the motor itself it could be a lot of things but I dont know much of the problem based on what you told us

P0010 on a Hyundai means your camshaft positioning oil control valve solenoid is screwed up. Could be the wiring to that, as well. Check the wiring first, if any loose connectors, clean and reseat and see if code stays cleared. If not, the solenoid needs replacing. The VVT (variable valve timing) system on this engine has been troublesome, and Hyundais in general are troublesome. People only buy them because they're cheap and disposable. There are cases where a P0010 is indicated a faulty ECM...big bucks.

Do you have normal compression ? Will it start if you use starting fluid to boost the fuel supply ?

Same as ALL vehicle issues Put a scanner on it & check for codes & look at data,don't use it like that, until you know the issue Have a shop drive it for 25 miles & record data & wait for it to act up,then diagnose the problem

The voltage regulator is built into the alternator. The alternator is connected to one of the belts on the engine.