1998 Pontiac Bonneville Logo
Anonymous Posted on Jul 17, 2012

Coolant in air intake and oil deposits on spark plugs

After an accidental over reving of the engine, check engine light flashed and then cam on steady. I noticed my car was running hotter than normal, and discovered a loss of coolant. Upon trying to fill the coolant,with engine running, the engine eventally stalled and would not restart. Symptomatic of plugs not firing or not getting fuel to plugs. After sometime, I noticed coolant leaking from air intake (coolant dripping out of air filter and air intake duct). The coolant was dripping directly on a wiring harness connected to some type of electronic modual. I then pulled a sparkplug and notice an excessive amount of oil/grease on the firing portion of the plug. Would like to know what causes coolant to enter air intake, oil/grease on plugs, and what the electrical modual is directly under air filter housing?

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Hia I have a Honda accord 2.4 vtec im getting steam coming from my exhaust even when the car is warm what are the symptoms need help urgently and its not going past 5000rpm

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  • Posted on Jul 17, 2012
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Probably blew your intake manifold gasket that would cause the antifreeze to enter the intake also a blown head gasket would cause the same symptoms as to the module I'm not sure could be the computer or the abs pump

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1answer

I have a 2000 Kia sephia I have Oil on my spark plugs. What can cause it?

There are three common reasons for oil on the plugs. A blown head gasket, worn valve stem oil seals and worn piston rings. The most likely reason will probably be the head gasket.
Check the coolant overflow tank for oil floating on top of the coolant. This is a sign of a blown head gasket.
For Valve stem oil seals check the following... On a Cold start you get a large thick cloud of blue coloured exhaust smoke. You also get the same smoke when going from idle to higher engine revs. Such as pulling away from a red traffic light after sitting waiting for traffic.
Does the vehicle use a lot of oil? Does it have excessively smoky exhaust gas, usually more of a grey/white colour, when driving? Has it lost power? Look in the engine air filter box. Is there oil? Worn piston rings sometimes cause 'blow back' where an oil/air vapour is forced back through the air intake into the air filter box.
tip

Engine Diagnosis Old Spark Plug Condition

Old spark plugs removed from your engine can tell a lot about the condition of the engine. Experienced mechanics can use this information to help diagnose several conditions simply by examining the state of the old plugs.

This tip is written as a useful guide to help diagnose engine problems and give a general indicator of the state of your engine. If you have ever wondered what you can tell from the condition of your old spark plugs please see the illustrations below.

As an example note that conditions such as over advanced ignition timing, lean fuel mixture or intake manifold leaks can often be determined from a plug that shows absence of deposits and a burnt or eroded electrode. However, sometimes this condition is caused by incorrect spark plugs having been fitted at some stage and in this case can be easily rectified by replacing the spark plugs with plugs that are in the correct heat range.

More serious conditions can be determined from oily deposits which indicate that oil is leaking past the valves guides or piston rings. In this case the mechanical fault will need to be rectified which will involve an engine strip down. These symptoms when seen on old spark plugs are a very significant diagnostic pointer as to how the engine has been performing up to this point and can help identify faults in the engine itself

The first picture in the illustration is of a healthy spark plug. Please follow through each of the images and you can compare your old spark plug against each of the images for a description of the engine problems that are associated with it.

Thanks for viewing my Tip.



Normal: Here we see a normal used plug which should be a brown to greyish color with only slight electrode wear. This plug has been operating correctly and is the in correct heat range for the vehicle.
3850b9d.jpg



Worn: On this plug you can see a rounded electrode. The normal colour deposits are seen but this plug has simply been in the vehicle too long.
f0d90a4.jpg



Plug Run Too Hot. The symptoms here are a blistered white insulator with an eroded electrode and an absence of deposits.
Causes: Incorrect heat range plug used, over advanced ignition timing, lean fuel mixture, intake manifold vaccuum leak, sticking valves or insufficient engine cooling.
417cde3.jpg



Carbon Deposits: Dry sooty deposits like this indicate either a rich fuel mixture or a weak ignition. This is a good indicator of a clogged air filter or a problem in the fuel or engine management system. Also check for ignition problems.
e1aa79d.jpg



Preignition: Here we see melted electrodes. You will note the insulator is white. This is an indication of severe misfiring and overheating. Can be an indicator of severe engine damage. Causes: Check for over advanced ignition timing, lean fuel mixture, insufficient engine cooling and lack of lubrication in the engine. Also check correct heat range plug has been used.
a83b8c6.jpg



Ash Deposits: Encrusting of light brown deposits observed on the electrodes. Causes: Oil or fuel additives - try changing the gas brand that you are using. Severe cases often indicate engine valve seal problems whereby oil is seeping into the combustion chambers.
94c22b6.jpg



High Speed Glazing: Insulator looks glazed and yellow. Condition is associated with sudden temperature rises from hard accelleration of the engine. Plugs in this condition can cause misfires at high speeds. These plugs will need to be changed and consider replacement with a colder temperature range plug.
17d5093.jpg




Oil Deposits: Indicative of oil leaking past the valve guides or piston rings and fouling the plug. Vehicle will run badly. Engine will need stripdown and repair.
2550cb7.jpg




Detonation: Insulator appears cracked or chipped. May have resulted from poor gapping technique which has damaged insulator. Can lead to piston damage. Replace plugs and ensure fuel anti knock values are correct. Ensure plugs are carefully and correctly gapped.
e2dc4d9.jpg




Gap Bridging: In this case deposits can clearly be seen lodged between the electrodes. The plug will not fire and this results in a dead cylinder. Clean or replace the plug.
ab865a7.jpg
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1answer

Hard starting

This problem can be hard to track down , it could be caused by several thing's ! A bad check valve in the fuel pump letting fuel drain back into the tank , not keeping fuel line pressure up , a crankshaft position sensor can also cause this as well as an ignition control module !
Checks
Action
DEFINITION: Engine cranks OK, but does not start for a long time. Does eventually run, or may start but immediately dies.
Preliminary
?ā‚¬Ā¢
Refer to Important Preliminary Checks Before Starting in Symptoms - Engine Controls .


?ā‚¬Ā¢
Inspect the powertrain control module (PCM) grounds for being clean, tight, and in the proper locations. Refer to Engine Controls Schematics .


?ā‚¬Ā¢
Search for bulletins.

Sensor/System
?ā‚¬Ā¢
Test the engine coolant temperature (ECT) sensor for being shifted in value. Connect a scan tool. Compare the engine coolant temperature against the intake air temperature (IAT) on a cold engine. The ECT and IAT sensor values should be within ?Ā± 3?Ā°C (5?Ā°F) of each other. If the ECT sensor is out of range with the IAT sensor, check the resistance of the ECT sensor. Refer to Temperature Versus Resistance for resistance specifications. Replace the ECT sensor if the resistance is not within the specification. If the sensor is within the specification, repair the ECT signal circuit for high resistance.


?ā‚¬Ā¢
Inspect the mass air flow (MAF) sensor installation. A MAF sensor that is incorrectly installed may cause a hard start. Important: The embossed arrows on the MAF sensor indicate the direction of the intake air flow. The arrows must point toward the engine. Install the MAF in the proper direction. Refer to Mass Airflow Sensor/Intake Air Temperature Sensor Replacement .


?ā‚¬Ā¢
Inspect the camshaft position (CMP) sensor for proper mounting and/or a bad connection. A long crank time occurs if the PCM does not receive a CMP signal.

Fuel System
?ā‚¬Ā¢
Inspect the fuel pump relay operation. The fuel pump should turn ON for 2 seconds when you turn ON the ignition. Refer to Fuel Pump Electrical Circuit Diagnosis .


?ā‚¬Ā¢
A faulty in-tank fuel pump check valve allows the fuel in the lines to drain back to the tank after the engine stops. Refer to Fuel System Diagnosis .


?ā‚¬Ā¢
Inspect both injector fuses for being open. An open injector fuse causes four injectors and four ignition coils not to operate. Replace the fuse. Inspect the injector circuits and the ignition coil circuits for an intermittent short to ground.


?ā‚¬Ā¢
Inspect for incorrect fuel pressure. Refer to Fuel System Diagnosis .


?ā‚¬Ā¢
Inspect for a restricted fuel filter. Refer to Fuel System Diagnosis .


?ā‚¬Ā¢
Inspect for a contaminated fuel condition. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .


Ignition System
?ā‚¬Ā¢
Test both injector fuses for being open. An open injector fuse causes four ignition coils and four injectors not to operate. Replace the fuse. Inspect the ignition coil circuits and the injector circuits for an intermittent short to ground.


?ā‚¬Ā¢
Inspect for proper ignition voltage output with J 26792 Spark Tester. Refer to Electronic Ignition (EI) System Diagnosis .


?ā‚¬Ā¢
Remove the spark plugs and check for the following:


-
Correct heat range


-
Wet plugs


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Cracks


-
Wear


-
Improper gap


-
Burned electrodes


-
Heavy deposits

Refer to Spark Plug Inspection in Engine Electrical.
?ā‚¬Ā¢
Determine the cause of the fouling before replacing the spark plugs if the spark plugs are gas, coolant, or oil fouled. Refer to DTC P0172 or P0175 for diagnosis of the rich condition. Refer to Spark Plug Inspection in Engine Electrical for diagnosis of coolant or oil fouled spark plugs.


?ā‚¬Ā¢
Inspect for bare or shorted ignition wires.


?ā‚¬Ā¢
Inspect for loose ignition coil grounds. Refer to Electronic Ignition (EI) System Diagnosis .

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My car have lack of power

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Whats the problem when the rpms go up when you put a 2004 dodge durango in reverse and the transmission is not sliping

Sounds like a faulty fuel injector. RPMS don't have anything to do with transmission. They have to do with the revolutions per minute of the engine which is controled by the 4 forces of combustion, Spray, Flash, Bang, Blow. Spray is the fuel going into the engine (injector), flash is the spark (spark plugs), bang is fuel lighting to make the "explosion", and blow is the force of the explosion against the piston turning the crank shaft in the engine, there by causing a revolution. The forces that control this process are fuel, oxygen, and flame. Because it's reving too high, you know it's not a spark plug problem. Check your fuel injectors and your air intake to the engine. Hope it helps!
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94 Buick Skylark, 3.1L, no start condition cause diagnosed as depressurized lifters? The car sat for a few weeks with the pushrods removed, the intake manifold gasket was being replaced. YES I'm...

I have never heard of this before but if this is the case then cranking the engine will refill them with engine oil surely ,i mean how do they build them on the assembly line at 3 engines a minute then start them from new on the test bed before the engine leaves the assembly for the body plant .Are you sure something else isnt wrong like the vacumn pipe to the valve on the end of the fuel injector line ?
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Check engine light on. 4 cylinder. Light flashes on acceleration. Sometimes idles rough. Computer scan reads random misfire and #2 & #3 misfiring. Added fuel injector cleaner but no help yet. Cleared...

There are three kinds of gasoline engine misfire scenarios, first there is the "under load" misfire and there is the "at engine idle" misfire, and finally there is misfire continuously. All engine misfires exist because one of three things has occurred. First, a cylinder has lost compression, a cylinder needs a certain amount of compression to operate correctly. Second, the ignition system has failed or is failing intermittently, spark is needed at the time of compression to ignite the fuel air mixture. Third, the fuel air mixture is incorrect, proper mixture is needed for the ignition system to ignite fuel properly. If any of these conditions occur in the engine, the engine will misfire.
1. Low or no compression can be caused by

a. burned or leaking intake or exhaust valves
b. worn or broken piston or piston rings
c. worn out camshaft
d. wrong weight motor oil was installed holding the cam followers from adjusting
e. broken valve spring
f. failed head gasket.
2. Ignition system has failed or is failing
a. spark plug has fouled or is worn out
b. ignition coil
has failed
c. spark plug wires have shorted
e. engine control module coil driver has failed
3. Fuel/Air Mixture is incorrect
a. vacuum leak at the intake manifold
b. fuel injector has failed
c. EGR valve is stuck open
d. mass air flow sensor has failed
e. oxygen sensor has failed
f. air intake boot is cracked

common problems:
1. fuel injector has failed or is failing
2. spark plug wire has shorted
3. spark plug is worn out or is cracked
4. ignition coil has failed is failing

Testing a coil on the car is pretty easy. No special tools are required. Just remember to be careful, the amount of electricity generated by your ignition system can be dangerous. If your coil is already off the car, or if you would like a more specific data-driven test, you can bench test your coil. To set up the test, remove one spark plug wire from its plug, then remove the spark plug using a spark plug socket. Next put the spark plug back into the spark plug wire. Be careful not to let anything drop into the empty spark plug hole -- very bad.
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