NO power/ acceleration with blinking CEL

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Mad E Moe - 24 Sep 2006 08:45 GMT

Ok for the past several days I've been having no power/accel issues
with my 01 Elantra . I've had the codes read at AutoZones AND the
dealer but no error codes are found . I've replaced the TPS 3 times ,
replaced the fuel filter , replaced plugs and wires ,checked the
timing and timing belt . So anyone out have a clue or SWAG to what
may be going on ?

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cableguy3 - 24 Sep 2006 13:28 GMT

So are you saying the dealership cannot find the problem? Did they only
check for codes or give your motor a good going over?

I had this same issue with a 97 Ford that I owned many years ago and the
dealership tried unsuccessfully to find the problem on two separate
occassions. They finally hooked up a data logger to my OBDII port so they
could "see" it happen as I was driving over a 1-2 week period. Not sure if
Hyundai has such a device but I would think they may. Basically, when ever
it happend while I was driving I would press a red button and it would log
30 sec back in time and 5 minutes moving forward so you could see exactly
what was going on.

Ended up being a bad O2 sensor that had gotten "water logged". Once
replaced, everything was back to normal and I was a very happy camper.
Not sure if this applies here but it sounds like your looking to turn over
every rock you can for a possible solution.

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Mad E Moe - 25 Sep 2006 06:02 GMT

Can't drive the car , I would risk ausing severe damage to the
catalytic converter and engine if I did so that option is out .
Apparently finding no codes is not an abnormal thing .

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hyundaitech - 25 Sep 2006 17:58 GMT

If your check engine lamp is flashing, there should be at least one trouble
code. The flashing lamp indicates a misfire. Even if there were no code,
the dealer (or any other competent shop) should be able to locate the
cause of a misfire. Misfires could be repaired prior to computerized fuel
systems. Certainly, they can be found and repaired using the same
procedures today.

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Brian Nystrom - 25 Sep 2006 21:37 GMT

> Ok for the past several days I've been having no power/accel issues
> with my 01 Elantra . I've had the codes read at AutoZones AND the
> dealer but no error codes are found . I've replaced the TPS 3 times ,
> replaced the fuel filter , replaced plugs and wires ,checked the
> timing and timing belt . So anyone out have a clue or SWAG to what
> may be going on ?

It may one of the coil packs. Check the connections to make sure they're
clean.

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Mad E Moe - 25 Sep 2006 23:19 GMT

Thats the FIRST thing I did when i had this problem , went over every
connection I could see , Had the codes read TWICE , once at Autozone
then at the dealer . The first time I had a similiar problem it was a
burnt through spark plug wire . Right now I'm trying to figure out if
the timing belt could be out in a way I can't see , but I've pulled
the covers and everything lines up . And also it only misses under
load , with the car in out of gear the engine revs up fine so Brian
may be closer to the truth of the matter . I guess I'm going to hit up
the Hmaservice website and see if I can find the resistive values on
the coil and check them out ...(Runs out the door to pull the coil
pack)

>> Ok for the past several days I've been having no power/accel issues
>> with my 01 Elantra . I've had the codes read at AutoZones AND the
[quoted text clipped - 5 lines]
>It may one of the coil packs. Check the connections to make sure they're
>clean.

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sqdancerLynn - 28 Sep 2006 22:50 GMT

Do a simple vacuum test If the vacuum at idle stays steady around 18 " it's
OK if it drops way down it indicates a clogged converter or muffler
Unbolt the ex pipe & run it briefly if the power is back you know it is
the problem

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