Question about 2003 Ford ZX2

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Hesitation when the gas is pushed slightly thr engine bogs, same problem letting off the gas. i notice a vecume leak sound by the back of the engine when the gas is pushed from idle also.

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  • heels fan Feb 06, 2009

    I sprayed carb cleaner and still could not find it. It sounds like its coming from underneath. My leak is really bad!

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The vacuum leak is the key to your problem, use a can of carb spray and find out where it is. Anytime air leaks into the engine that does not get metered by the MAF sensor then a lean condition will be caused, this makes the engine hesitate.

Posted on Oct 21, 2008

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Posted on Jan 02, 2017

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Car idles fine, but sputters, bogs and dies if gas pedal is pressed.


new spark plugs this decade. (a tune up?0
the filter is part of all 60k tuneups. letting it clog wrecks good pumps.
my wild guess, its lack of fuel flow, do to old filter.
or low fuel pressure.
car is identical to a Corolla. so is not unique or rare as some Geo cars are.
the cam belt not changes, invites valve kissing piston tops. BOOM
end of engine. (costs more to fix then worth of car)
the word is bogging, my engine bogs
if if bogs WOT (wide open throttle) and dont catch up < ITS NOT THE TPS. ever.
tps bad causes short bogs, called hesitations.
The map sensor , is what measure air flow and the ECU matches fuel to this air flow.
my guess, is it does that, but fuel pressure is like 15PSI, bad.

Apr 14, 2015 | 1995 Geo Prizm

1 Answer

2004 oldmobile alero stumbles at about 4000 rpm, particularly on hill. battery light comes on briefly when this happens


pushing the accelerator to the floor causes it to go into clear flood mode .the control module reduces the fuel injector pulse width in order to increase the air to fuel ratio. It could be get to much fuel , leaking fuel injectors or a bad fuel pressure regulator . Pull the vacuum hose off the regulator an see if fuel drips from it , if it does the diaphram has a hole in it .

Mar 19, 2017 | 2004 Oldsmobile Alero

1 Answer

Poor idle,hard start in the mornings and gas smell and slight hesitation on move off


Check the:
1 Cylinder compression/ valve clearance.
2. Ignition system.
3. Spark plugs.
4. Fuel pump pressure.
5. Injectors.

Feb 07, 2012 | 2005 Toyota Yaris 1.3

1 Answer

Runs rough and loud


Take it to the dealer and ask them what the problem is.

Jan 28, 2012 | 1994 Dodge Caravan

1 Answer

Hi my 95 22re is hesitating (bogging) on acceleration i changed plugs wires and cap and rotor ,i then checked the mass air flow sensor it is fine could this be a weak fuel pump?


did you ever fix your 95 22re? my truck is doing the smae thing. checked everything you did and it was fine. a lot of people are saying fuel pump or vecume. did you ever find out what the problem was?

Feb 10, 2011 | 1995 Toyota Pickup

1 Answer

My 1997 Jeep Grand Cherokee Laredo is starting to have a ''slight'' hesitation after I shut it off and re-start it again. WHen I accelerate at first it hesitates a bit. I let off the gas for a few seconds...


A slight hesitation after engine shut off due to engine running rich meaning not meeting golden air:gas ratio of 14.6:1 so fuel residue in chamber continue to burn for the last moment. The same rich fuel problem that was why you had to let gas off during acceleration. Need to Check out the O2 sensor Check out MAP sensor Good luck

Sep 13, 2009 | 1997 Jeep Grand Cherokee

1 Answer

2004 Isuzu Rodeo 3.5ltr 4X4 hesitation/misfire acceleration


The upper intake gaskets may be leaking. They are made of plastic and metal and will leak air. Do not remove the cover on very top of manifold when changing.

Jul 24, 2009 | Isuzu Rodeo Cars & Trucks

2 Answers

As i accelerate the engine bogs a little bit, starts &idles good


has the fuel filter every been changed? sounds like low fuel pressure.

May 01, 2009 | 1991 Nissan Pickup

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