Shop Hyundai Fuel Level Sensors

When it hesitates does it feel like it is skipping, surging, bucking, and/or delay before your accelerate?

This one might be hard to diagnose over the internet if there are no trouble codes popping up without monitoring scan tool data. Which monitors are not readying?

One thing that you could have done is to check the fuel pressure to be sure it is in range when the engine is warm. They'll need special adapters to connect up a gauge to that one.

the evap, o2, and catlyst monitors arent ready, the mechanic said an engine problem would be causing them to not reset and until fixed they wont be ready....?

The cat monitor won't ready until the O2 tests pass.

EVAP monitor is one of the harder tests to get to run because of the criteria that has to be met. EVAP problems usually don't cause drive-ability issues unless the purge valve is stuck open.

Like I mentioned before the data stream is going to need to be monitored while the problem is occurring to see if anything stands out.

Would be interesting to watch the short and long term fuel trims when this is occurring. Just need some data or clues to go on to get some direction on where the problem is.

Most of the time if you have a secondary ignition issue a code would be set. I've seen crank sensors on those start to go bad and have those symptoms when it gets hot, but you really would need to use a lab scope to confirm that before replacing something like that.

There is a whole slew of possibilities, but someone with the knowledge and right equipment should be able to pinpoint the problem.

So i just heard back from my mechanic and he says its the crankshaft positioning sensor. he said this should take care of the performance issues and he found this out by running diagnostics. so hopefully this actually fixes the problem for good because i really cannot afford to put much more money into this car. does this sound accurate?

Like I mentioned they did have crank sensor troubles on those vehicles. If your mechanic took the time to diagnose it correctly, then you should go by his/her word. If you don't feel comfortable with your mechanic's find, you can always get a second opinion.

Nevermind it didn't fix the problem. They ran diagnostics and still no idea what's wrong!

another thing i noticed also was that when i get gas it takes forever for the gauge to actually go to where i filled it to. could that have to do with fuel pressure?

I take that back. On this vehicle the PCM doesn't monitor the fuel level in the tank. There could be a sender problem, but that still shouldn't cause a drive-ability issue.

You might want to check the connections at the fuel pump. Wiggle the connections around to see if your fuel gauge changes. Inspect the connector and terminals also. Fuel pump is behind the access cover underneath the rear seat cushion.

it feels like a delay in accelteration. ill step on the gas but it wont accelerate as fast as it should be. then if i give it more gas it will go. but sometimes it takes entirely too long and too much gas to get it to move faster. and then the jerking happens at low rpms at all speeds but only after warmed up.