Dry carbon coated spark plugs HELP!

**IamJoylucK** · March 15th, 2011 07:04 PM

Pa help naman sa car trouble ko

car details
toyota corona carb
12r engine
Oil change, air filter change two weeks ago, fuel filter and high tensions wires changed about 6 months ago, Radiator flush and cleaned a month ago.

I took a a road trip up to laguna about a week ago around 90kms. Got home okay and engine was running okay. On weekends i make it a habit to check my spark plugs para makita kung malinis pa and okay naman ang lahat.

Today i made a short trip to SM around 20kms away wala naman problema, pero on the way home about half way napansin ko biglang naging 1300 menor ko pero ok pa naman andar pero pag naka stop at idle malakas ang menor at vibration ng engine. Got home okay then checked my spark plugs asap, they were all covered with dry black carbon and the tip of my muffler also had black carbon on it, i cleaned off the spark plugs and sprayed carb cleaner down the carb at naging okay naman ang andar at bumalik sa dati ang menor, di ko pa nata try sa long drive uli at baka tumirik, ano po kaya problem ng car ko? TIA

**IamJoylucK** · March 16th, 2011 12:42 AM

Additional info:

Oil level is okay, hindi nababa, hindi tumataas
Coolant level is okay pati sa reservoir, hindi naman nagbabawas
Coolant is clear green, Oil is normal color... no overheating..

Gas is half full, same gas and gas station lang ang pinupuntahan ko.

**niky** · March 16th, 2011 01:36 AM

Originally Posted by IamJoylucK

Additional info:

Oil level is okay, hindi nababa, hindi tumataas
Coolant level is okay pati sa reservoir, hindi naman nagbabawas
Coolant is clear green, Oil is normal color... no overheating..

Gas is half full, same gas and gas station lang ang pinupuntahan ko.

Black tipped plugs indicate you're running rich. You should have your carburetor cleaned and checked.

**IamJoylucK** · March 16th, 2011 01:52 AM

Originally Posted by niky

Black tipped plugs indicate you're running rich. You should have your carburetor cleaned and checked.

Thanks niky! I hope yun lang ang problema, i read somewhere na puwede rin ignition coil? Ano po ba symptoms of an ignition coil going bad po? TIA

**miked** · March 16th, 2011 09:21 AM

Wag ugaliing weekly ang checking ng sparkplugs or else you'll destroy its gasket prematurely which can lead to compression problems or you could also cross thread the spark plug hole which is a bigger problem...

+1 sa sinabi ni niky because due to normal wear and tear. the adjusting screw tip undergoes wear and tear, the reason why we need to regularly tune up engines......hth

**theshepherd** · March 17th, 2011 02:10 PM

Metallic silver ba RT140 mo boss?
Palagi ako nakakakita ng silver edition dito sa Sta. Rosa baka ikaw yun.
Anyway, tama sila boss, huwag mo palagi tingnan ang sparkplugs mo. Pa re-timing mo, tapos palit ng sparkplugs. Had a silver edition way back, kaya lahat ng problema mo baka na experience ko na rin.

**IamJoylucK** · March 19th, 2011 01:37 AM

Originally Posted by miked

Wag ugaliing weekly ang checking ng sparkplugs or else you'll destroy its gasket prematurely which can lead to compression problems or you could also cross thread the spark plug hole which is a bigger problem...

+1 sa sinabi ni niky because due to normal wear and tear. the adjusting screw tip undergoes wear and tear, the reason why we need to regularly tune up engines......hth

Thanks po sa advice!

Originally Posted by theshepherd

Metallic silver ba RT140 mo boss?
Palagi ako nakakakita ng silver edition dito sa Sta. Rosa baka ikaw yun.
Anyway, tama sila boss, huwag mo palagi tingnan ang sparkplugs mo. Pa re-timing mo, tapos palit ng sparkplugs. Had a silver edition way back, kaya lahat ng problema mo baka na experience ko na rin.

White lang yun akin... carb cleaned, spark plugs changed again, timing was checked din... so far maganda naman ang idle at takbo maliban lang sa unusual na noise pag accelerating lang naman... pag bitaw sa gas wala un tunog or pagdating sa mga 3k rpm wala rin un tunog, malakas lang pag 1.5k-2.5k rpm, baka may alam ka kung bakit? TIA

**reym** · March 20th, 2011 04:52 PM

Ung unang problem mo, maaring barado ang carb, tama si nik pero it takes two to tango, kailangan mo rin mag palit ng contact point para lumakas ang korienteng pang sunog nga gasolina.

Ung pangalawang problema mo eh kailangan mo nang pa adjust yung valve tappets mo, yun lang ang iingay jan.

I'm glad you like the classic 12 r engine. Napakatibay nyan. Kumusta fuel consumption mo sa city and highway?

Also, masisira thread ng sparkplug sockets pag lagi mo tinaatagal ang plugs..

**Chinoi** · March 21st, 2011 02:59 PM

Originally Posted by IamJoylucK

Pa help naman sa car trouble ko

car details
toyota corona carb
12r engine
Oil change, air filter change two weeks ago, fuel filter and high tensions wires changed about 6 months ago, Radiator flush and cleaned a month ago.

I took a a road trip up to laguna about a week ago around 90kms. Got home okay and engine was running okay. On weekends i make it a habit to check my spark plugs para makita kung malinis pa and okay naman ang lahat.

Today i made a short trip to SM around 20kms away wala naman problema, pero on the way home about half way napansin ko biglang naging 1300 menor ko pero ok pa naman andar pero pag naka stop at idle malakas ang menor at vibration ng engine. Got home okay then checked my spark plugs asap, they were all covered with dry black carbon and the tip of my muffler also had black carbon on it, i cleaned off the spark plugs and sprayed carb cleaner down the carb at naging okay naman ang andar at bumalik sa dati ang menor, di ko pa nata try sa long drive uli at baka tumirik, ano po kaya problem ng car ko? TIA

Malakas ba magbawas sa oil ang engine mo? Or mausok ang muffler mo pag reach mo ng 80kph. Pa compression test mo engine para malaman kung loose compression or Carb problem. Black or carbon deposit sa spark plug ay sign ng sunog na oil or rich gas mixture adjustment ng Carb. Mas mura pa-adjust or cleaning ng carb.