Question about Suzuki Grand Vitara

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Engine runs rough at idle has a code 0101 and 0113 will stall when put in drive

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I have a 2000 suzuki grand vitara. Everything was fine until my husband replaced bad radiator. Now my car has RPM's in the 2000 range when parked, and i feel like it's having a rough time getting up hills. Today I went out to move the car out of driveway so Husband could leave and put it in reverse, there was a long pause of hesitation. Very scary. Please help and yes my 02 censor, fuel filter have been changed.

Posted on Jul 03, 2015

  • Anonymous Jul 04, 2015

    start own post?

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No year, wow. 1996 or newer but how new>???????????
which engine, we can not ever guess that?
saying engine size, or year, makes all answers just generic
or worst , a guess.
you left off the first letter, P0101 is not U0101. see?
so post the full DTC code, do not chop off letters...
P0 means power train, and the 0 means USA std. Federal codes.

that stall (if tuned up) is a sign of bad MAF>

P0113, means the air cleaner box. IAT sensor is unplugged.
it's stuck at 5v. (means that) Plug it back in and reset ECU.

the P0101 is complex. (performance related)
there are 2 more codes for MAF stuck at 5v, and one for 0v.
and is not happening. so it's not unplugged or dead.

what this code really means, (i know, i fix ECU's)
is that, the MAF seems the flow incongruous to other sensors.
(aka. air meter)
that means say , you are driving fast up a hill. and the maf reads low. but the TPS angles are high, and RPM high but the maf reads low. (bam)
a good tech knows......
that means, the engine is weak or the MAF IS WEAK.
if unstated year car is old. say 1996, i do a compression tests.!!!
so I test the MAF after i clean it. (gently with maf cleaner CRC brand) from 8-12" away,never blast it close,!!!

after cleaning it, i check the voltage on it keyon, idle and gunning the engine, if you have a A/T transmission, i can do the tranny stall test. (holding brakes hard) "a poor mans DYNO"
no transmission stated either, so i guess that too.
this can give me 3volts out of the MAF output pin.
if stuck low say 1.5, then the maf is bad.

a weak maf cause the ECU to under inject big time.

is your engine vacuum at 19"HG it idle hot?
and not bouncing?
if a G16 engine is the cam belt new, an timed right?


G16, J20, or H25./27 engines, all work different and not stated.

here is a full driving session OBD2 MAF plot (logging scan tool )

with TPS, G16

http://www.fixkick.com/my96-16v/MAF-TPS.JPG

note the 55 grams/min flows.
i can make it go higher at 100% engine load.

Posted on Apr 30, 2015

  • Anonymous Jul 04, 2015

    fix the unplugged IAT sensor first, reset all DTCs and drive it, see if 101 comes back.
    if it does clean the maf. (from a distance)
    use CRC maf cleaner, do not put the nozzle 1 inch from actual hot wire sensor or you destroy a $500 sensor, clean it from 1 foot away, do so 3 times soak, wait 1min, spary, repeat 3 times.
    MAFS all coke up. from sucking in the smog of car i front of you, and bug guts.,etc.
    or running aftermarket hot rod oil soaked $$$$ B.S. air cleaners.. (go back to stock and win)
    clean it and RESET.

    the IAT on many cars gets unplugged by bad mechs that remove it for air cleaner service
    and dont put it back. the error 113 means its disconnected....a gross electrical failure.

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0101 points to the mass air flow seonsor. 0113 points to the air temp sensor. Check your air intake for blockage, check the filter and make sure it is not overly clogged. IF all those are clear, I would replace the mass airflow sensor before the air temp sensor, as the air temp sensor does not have as much bearing on whether the engine runs well or not.

Posted on Apr 27, 2015

  • 1 more comment 
  • Anonymous Jul 04, 2015

    so true but unplugged puts PCM in limphome,
    and that be different,....
    reading wrong, is true, dead is different.

  • Anonymous Jul 04, 2015

    the IAT is only a fine tune on air density
    but the PCM sees 5 volt there, the sensor is dead. and most PCM go to limphome on dead sensors. (and attempts to mimic it)

  • Anonymous Jul 04, 2015

    the wise mech fixes the dead first......

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