Question about 2005 Suzuki Forenza

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Vibration while idling

I have a 2005 Suzuki Forenza. When I am idling (at a stop light etc) the car vibrates. What causes this?

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  • zill130 Dec 14, 2008

    at idling vibration took it to dealer, they replaced auto trans. elect switch assy, trottlebody air resonator,air by pass hose.- Still the car have the same vibration, the service advisor told me, that I am not used to 4 cylinder car, therefore the vibration is normal, ?

  • Anonymous Mar 22, 2014

    hood vibrating idle


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I have a 2005 . The pcv valve was not working pro[perly. Hot exhaust was entering the oil pan and overheating the oil. The oil was in a crumbly mush in the pan when it was removed. almost 1/2 inch deep. almost had blocked oil pump pickup screen. also remove valve cover and check if oil is draining into lower engine properly. mine had the passages almost blocked that it drained down. I spent hours cleaning the inside of the engine to get all the oil mush out..

Posted on Sep 18, 2012

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Your engine needs tune up if you havent done this for a long time, also be alert of overheating check your temp gauge next time it happens again on a stop light. be free to comment,

Posted on Nov 22, 2008

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1 Answer

I have a 2005 Forenza wagon automatic stalls when I'm idling at light any suggestions

what engine is in it? answers depend on THAT. (accurate)
ever put in spark plugs this decade?
engine (good engines)
stall for these reasons.
1: BAD SPARK (do a tune up ever?)
2: BAD FUELING. (too much floods talls, tool little stave stall)
3: EGR main valve stuck open.
4: ISC stuck closed (idle speed controller)
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check fuse first.
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Oct 06, 2014 | 2005 Suzuki Forenza

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My 2005 Suzuki Forenza brake light and battery light on dash are on but battery and brakes are good.

you lost the operators guide,?
it costs $4 for a 1 day read. at

if you had that and read the warning light page you'd know...
did you check all fuses yet?
the battery light is really a battery charge lamp light.
if that lamp is out key on , only the lamp is bad.
if that lamp is out running,the alternator has shut down, (ask how to find true cause) or the engine is idling WAY below 800 RPM , is it?
brakes 101
the lamp serves many functions.
1: hand brake stuck on,.
2: low fluid in the MC Reservoir. (on master cylinder)
3: the front or rear brakes are weak or bad, (pressure diff, valve switch is active (bad news, do not drive)
4: ABS told , this lamp its not happy? (see FSM on topic)
if the 2st two are good, you then read the FSM. on brakes.

the fsm is here too , and has a 1 day pass....

is engine idling way too low ? not at 800rpm or more>?
that be first to fix, if true. and unsaid.
is the fan belt tight to the Alternator ?
is system voltage at 13.3 to 15v running, ( I BET NOT)
if NOT, fix that first , non of the electronics likes voltages much
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Feb 10, 2014 | Suzuki Forenza Cars & Trucks

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Idle fluctuates when I stop at a stop sign or light

I had the same problem in my 2006 suzuki forenza, it ended up being that my valve cover gasket was leaking engline oil all over the place, into my spark plug reservoirs and everything. When my husband replaced the gasket and cleaned all of the oil that had leaked into my spark plugs and reservoirs the problem was solved, now it runs beautifully!! Good luck

Apr 04, 2013 | 2005 Suzuki Forenza

1 Answer

Inconsistant idle

bad idle can be caused by 100 things, but for sure the ECU has lost control, we check all other things first then work dead idle last.
but the #1 cause of bad idle (you never said the low rpm hot?)
but EGR stuck open. is #1
other causes:
1; needs a tune up bad.
2: air fuel ratio bad, (bad fueling of any kind)
3: ECU stuck in limphome mode, is CEL glowing running? if yes, then pull the codes, better is a full scan now.

Apr 04, 2013 | 2005 Suzuki Forenza

1 Answer

How do i adjust the idle up on my suzuki forenza?

Technically, you don't.
Idle speed is controlled by the computer.

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2005 suzuki forenza owners manuel

Engine light stays on after overfilling the gas tank. How to turn off the light.

Jun 30, 2011 | 2005 Suzuki Forenza

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Why does my frenzy vibrate when stopped and in park? It vibrates less in neutral but it still vibrates.


Sep 17, 2010 | 2004 Suzuki Forenza

2 Answers

I have a 2005 suzuki forenza.. I loose coolant like its nothing no signs of leak.. Low rough idle..I replaced the plugs and wires and 02 sensor Engine light flashes at idle and stops flashing but remains...

Check your oil----is it very high? Put a piece of cardboard under your car overnight, see if you have any leaks externally. If not, then you have an internal leak, which indicates a blown head gasket.

Oct 21, 2009 | 2005 Suzuki Forenza

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