2000 Sonata fuel control
 

After a LOT of different opinions and work, going on months now, after
having the head pulled twice and all sorts of excitement, the car now
runs (sort of). I took it back finally and decided to check into it
myself.

The injectors on cylinders 1 and 3 are wide open. 2 and 4 seem to be
cycling normally. If I disconnect 1 and 3, the engine runs just as
you'd expect with two dead cylinders. When they're reconnected, it
runs very rough, and I suppose that's why they were convinced it was a
timing problem intially. Swapping the injectors around makes no
difference, it's not a mechanical problem with them, and from what I
could trace by sight, it looks like there're two wire pairs, but for
1-2 and 3-4, so why one of each pair?

This thing's been through dealership mechanics and another shop, both
of which pulled the head, so it's very possible that something's
either not connected or not connected properly, or the entire problem
was with a module. I just don't want to deal with any of these
"professionals" now if I can help it.

Re: 2000 Sonata fuel control
 

What DTC's do you have? I'm presuming you have some.

Re: 2000 Sonata fuel control
 

hyundaitech wrote:
> What DTC's do you have? I'm presuming you have some.
>

No check engine light or anything, I'll check anyway though.

Re: 2000 Sonata fuel control
 

What symptoms do you have?

Re: 2000 Sonata fuel control
 

Sorry. Definitely a brain fart here. I forgot the content of your
original post and was too lazy too look at it. Did you run a test that
positively confirms the injectors are open or are you basing this
conclusion on how the engine is running? Do you know what a noid light
is, and if so, do you have one?

Re: 2000 Sonata fuel control
 

hyundaitech wrote:
> Sorry. Definitely a brain fart here. I forgot the content of your
> original post and was too lazy too look at it. Did you run a test that
> positively confirms the injectors are open or are you basing this
> conclusion on how the engine is running? Do you know what a noid light
> is, and if so, do you have one?

Just checking the voltage, it varies as expected while disconnected, but
once connected to the injector it runs a steady 12v. I got an ECM from
a wrecking yard, and it then had three working cylinders. I assume that
it's the ECM at this point, though I returned the almost-functional one.
Apparently those aren't rebuilt by anyone I could locate, over $600
shipped from Korea.