Check Engine and Fluctuating RPM

**robgowild** · March 31st, 2015 09:48 AM

Originally Posted by rodetor

Did you replace your OIL FILTER, when you made an Oil Changed?

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Yes sir. I also replaced the oil filter

**jick.cejoco** · March 31st, 2015 10:00 AM

Relevance people. Relevance.

**rodetor** · March 31st, 2015 05:36 PM

Check Engine Light (CEL) will only lit when a problem arise. Sa fluctuating RPM naman, ano ba pwede magdulot ng ganyan?

Opinyon ko lang ha. Ayon at base sa sinabi mo naging problema. Your car is Mazda 3. It runs in gas, and EFI. Kung wala problema sa Fuel Filter at Fuel Pump. Try mo ipalinis Throttle Body at Idle Air Contol Valve (IACV) nya. Baka stuck up lang IACV sa dumi.

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**rodetor** · March 31st, 2015 05:46 PM

Originally Posted by robgowild

Yes sir. I also replaced the oil filter

I asked because, when you change oil ang did not replace the oil filter. Oil will not recirculate well, and oil pressure would be insufficient, kahit ok sa indicator nya. Some of my friends experience troubles when they DIY changing oil without replacing it oil filters. The results are, poor performance, tourqe and speed.

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**JohnM** · April 1st, 2015 03:38 PM

Try checking the plug sa MAF sensor. Baka lumuwag when you replaced your air filter.

**robgowild** · May 4th, 2015 07:13 PM

Napa ayos ko na yung fluctuating RPM. Bale maluwag daw yung kabit nung mga spark plugs kaya ganun. I also have the throttle body cleaned and pina adjust ko yung throttle cable kasi may play yung accelerator. Ngayon okay na yung takbo pero bumilis siya, i don't know kung nanibago lang ako sa takbo or sumobra yung adjust ng throttle.

Napansin ko when in drive the idle is around 800 to 1k RPM then pag naka park mejo tumataas ng konti sa 1k RPM. Then also when I cruise in the neighborhood I no longer need to press the accelerator kasi umaandar na hanggang bumilis kaya alalay na ako sa break. Also kapag slightly sloping down yung road bumibilis agad yung takbo kahit di ako naka tapak sa accelerator then the RPM goes upro 1500 RPM to 1800 RPM. Normal lang ba yun mga sir?

**rodetor** · May 4th, 2015 09:32 PM

Directly proportional naman po ang RPM sa speed, when you shift in the correct proper gear position. Your acceleration of speed upon descending a slope without pressing your gas pedal indicates that there no slack or play on your throttle cable. Adjust nyo nalang po sa within specs.

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**sirkosero** · May 4th, 2015 09:45 PM

mukhang nasobrahan yung adjust sa accelerator cable.

that explains your 'parang bumilis' ,mataas na idling at yung rpm na tumataas while on a slope.

paadjust mo muna uli ng konti and check for stuck or maganit na linkages