Question about 1992 Toyota 4Runner

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Spark plugs on my 1992 4x4 sr5 4runner 6cyl 3.eng auto are covered in dry carbon why

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Carbon build up comes from rich mixture or weak ignition. This will cause misfiring, hesitation and hard starting. To fix the problem, change the plugs and use a plug that will produce a higher heat range. Which means it has a hotter firing/ignition when combustion. This will burn the excess gas that causes the carbon. Be sure to check the plug wires to make sure you don't have spark jumping. (check at night with engine running). Also be sure the air filter is clean.

Posted on Jul 06, 2010

  • Chris Busby
    Chris Busby Jul 06, 2010

    I will suggest to use the NGK plugs or use Bosch platinum. After an engine wears, the OEM or basic plugs don't work as good anymore unless OEM uses a higher grade plug. I just installed a plug called E3 diamond in my Expedition which has a higher firing spark. It supposed to give better gas mileage, a little more horsepower and burn the excess gas. These are about $6 a piece which to me is worth it as long as I see results. Which I have, and won't be the case for all. These have a 5 year warranty and can be returned if you're not happy with the results. Sometimes if you go with to much of plug such as one of bosch's top plugs or any for that matter it can cause your engine to skip. Just let them know you need a step up from the OEM.

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I found your solution at:
http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?pageId=0900c1528006a6fa

But www.autozone.com will want you to register at the site (free) to access their vehicle repair guide database.
Your info: Dodge Intrepid 3.3L MFI (multi-port fuel injected) 6cyl
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2001 mitsubishi montero limited light on service engine soon 110000 milege burning smell from engine oil ok transmission oil ok coolant ok


look hard around your valve cover or your spark plugs holes especially #3 and #5. i found mine on 3 and 5 spark plugs. oil sometimes drip down to hot eng and smell like burn oil. possibility your valve cover that seal your spark plug hole is worn out and leak around the valve cover and straight down to hot area. replacing valve cover gasket is not easy and if you take it shop will cost you over $1000.00 because of intake manifold and a lots of hardwares to remove. shop around before you take it to the shop. if you do it your self with a friend make sure you take picture for every lines ,bolts sensor plugs and so on you remove. also may as well tune up or change your spark plugs. good luck

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I need the diagram to put the spark plug cables


2003 Chevrolet Malibu 3.1L SFI OHV 6cyl
Spark Plug Wires - Removal & Installation

3.5L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
    NOTE Twist the spark plug boot one-half turn in order to release the boot. Pull on the spark plug boot only. Do not pull on the spark plug wire or the wire could be damaged.
  2. Remove the intake manifold cover, if required.
  3. Disconnect the left side spark plug wires from the spark plugs.
  4. Disconnect the left side spark plug wires from the ignition coil.
  5. Remove the spark plug wire clips from the Manifold Absolute Pressure (MAP) sensor bracket and the heater inlet and outlet pipe tab.
  6. Remove the spark plug wire assembly.
  7. If replacing only one plug wire, open the retaining clips and remove the appropriate spark plug wire.
  8. Disconnect the right side spark plug wires from the spark plugs.
  9. Disconnect the right side spark plugs from the ignition coils.
  10. Remove the spark plug wire assembly.
  11. If replacing only one plug wire, open the retaining clip and remove the appropriate spark plug wire.
To install:
  1. Install the spark plug wire assembly.
  2. Connect the right side spark plugs to the ignition coils.
  3. Connect the right side spark plug wires to the spark plugs.
  4. If replacing only one plug wire, open the retaining clip and install the appropriate spark plug wire.
  5. Install the spark plug wire assembly.
  6. Connect the left side spark plug wires to the spark plugs.
  7. Connect the left side spark plug wires to the ignition coil.
  8. Install the spark plug wire clips to the MAP sensor bracket and the heater inlet and outlet pipe tab.
  9. If replacing only one plug wire, open the retaining clips and install the appropriate spark plug wire.
  10. Install the intake manifold cover, if required.

Fig. 2.2L Engine Firing Order: 1-3-4-2 Distributorless ignition system
74d742b.jpg


Fig. 3.1L Engine Firing order: 1-2-3-4-5-6 Distributorless ignition system
306b531.jpg


Fig. 3.5L Engine Firing order: 1-2-3-4-5-6 Distributorless ignition system
9313fa7.jpg


Fig. 2.4L Engine Firing order: 1-3-4-2 Distributorless ignition system
2c9af72.jpg


Fig. 3.1L Engine Firing order: 1-2-3-4-5-6 Distributorless ignition system
d929c16.jpg


Fig. 2.2L Engine Firing Order: 1-3-4-2 Distributorless ignition system
f357cd3.jpg

Fig. 3.5L & 3.9L Engines Firing order: 1-2-3-4-5-6 Distributorless ignition system
09e9db9.jpg

I really hope help you with this (remember rated this help) Good luck.

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Tune Up


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