ignition problem and slow to accelerate

[oliveramr]

Hi

I have a Kia Sportage 2002 2 WHEEL DRIVE and change the spark plug BKR6E-11 NGK but i have problem with the start and slow to accelerated, i check the spark plug wire and the wire is ok.

Any idea

[Harry Morgan]

Oliver

Did you have this problem before you changed the plugs ?

Did this problem happen suddenly ?

Is the check engine light ON ?

Harry

[oliveramr]

Originally Posted by Harry Morgan

Oliver

Did you have this problem before you changed the plugs ?

Did this problem happen suddenly ?

Is the check engine light ON ?

Harry

It is the first time that change the spark plug, buy second-hand the Kia in Guatemala.

And the engine ligth is off.

before the change kia workings fine, I placed the old spark plug and works best, but the problem still persists.

[Harry Morgan]

Olive

OK, so it sounds like something that was removed to get at the spark plugs is either damaged or loose.

The large throttlebody tubing contains several electronic sensors -- make sure they are OK... no broken wires, etc. Also, where the throttlebody intake tube connects there is a gasket -- make sure that it is not damaged.

Harry

[oliveramr]

Hi Harry and thanks for you help,

In the afternoon the engine ligth turner on and check with the scanner get me the code P0171.

My mechanics tell me, that he changed the head cylinders package and the spark plug after that changes the car is with this problems.

Sorry for my english.

Thanks Oliver.

[ron1004]

That code points to a lean condition which most often is an inlet manifold vacuum leak, but not the only possibility.
Make sure that the flexible rubber pipe between the MAF and the throttle body is in good condition.

Also make sure that the spark plug gaps are at 0.75mm - many documents specify a 1.0mm gap which is incorrect.


P0171
Related Items
1)Faulty fuel delivery system.
2)Clogged fuel injector(s).
3)Faulty fuel injector(s).
4)Leak in intake system.
5)Leak in exhaust system.
6)Faulty Mass Air Flow Sensor.
7)Faulty Throttle Position Sensor.

[oliveramr]

Thank ron1004,

I chek anything that tells me and told them.

Oliver

[Harry Morgan]

Oliver

Given the circumstances, I agree with Ron -- likely a vacuum leak of somekind... especially if you hear a "hissing" noise on the top of the engine.

Next would be the fuel filter (to remove, just push inward each connector, then squeeze the release points, then pull outward to remove).

Finally, I would guess the MAF sensor, which is easily tested -- warm the engine and find the pin #4 wire (Red/Green) and see if the voltage is between 0.8 volts and 1.2 volts at idle; then, increase the RPM to 2000 RPM and see if the voltage is between 3.5 volts and 4.0 volts... if not, then replace it (about $90 at AutoZone).

Harry

[oliveramr]

Thank Harry,

I check the MAF Sensor in the pin 4 wire (red/green) and the voltage is 0.8 volts and 1.2 volts at idle, but when increase the RPM tu 2000 RPM the voltage is 1.6 volts.

thank for you help.

Oliver.