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Changed spark plugs now engine light is on and big loss of power?
Wiki User
∙ 14y ago
Several possible issues; most probable is that you didn't seat all of the plug wires completely, second is that you didn't return the spark plug wires to the same plug/cylinder they were on before and third, one of the new plugs could be bad (not probable but I had it happen once). To check the individual plugs, remove and replace the wires one at a time with engine off. Make sure you push them all the way on! To check for a bad plug there are 2 methods. The easiest and MOST DANGEROUS is you can remove the wires one at a time while the engine is running. BE CAREFUL, the voltage on new cars is very high and can give you a real jolt OR WORSE. I use long pliers with good insulated handles (plus rubber soled shoes, don't touch any metal on the car and make sure you aren't standing in water) but YOU ARE ON YOUR OWN ON THIS ONE! The second would be to take one of your old plugs that you know works (albeit not that well) and use it in place of your new plugs one at a time. If you replace a new plug with the old one, and the roughness stops, that would be the bad plug. Take it back and get a new one. A final possibility is that you have bad wires that were disturbed by the plug changing. The easiest way to check for bad wires is to spray water (gentle spray) on the wires at nigh (in the dark). Bad wires and insulation will look like a Christmas Tree!
Wiki User
∙ 14y ago
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Why is the reduced engine power and check engine light Chevy suburban?
If the check engine light code is "Random Multiple Misfirings", you need a tune up. Have the spark plugs and wires changed. The loss of power is due to misfirings.
Why would you be losing power and why is it some time your engine light come on?
Your engine could be losing power and your check engine light coming on for many reasons. It could be your spark plugs needing to be changed. Your fuel pump or fuel filter could be clogged or starting to wear out, or your engine oil is to low.
Why is the yellow engine light on in a Daewoo Matiz?
I have a daewoo matiz that has low power when the engine light comes on I have changed the spark plugs/leads/distributer cap/distributer/and coil checked the timing changed the fuel filter air filter and it still looses power when the engine light comes on. You have spent a lot of money and you still have the problem. Do you not think it might be time to take it to an expert and have it repaired correctly. You would've been money ahead right at this moment.
2002 grand am no power misfires no traction and engine light on changed coil pack and plugs new fuel pump?
Have you run a diagnostic test? You can borrow, rent or buy a code scanner from most auto parts retailers. If the engine light is on it means the computer has a "code" that it wants to report.
What effects can bad spark plugs have on your vehicle?
Bad spark plugs can have a variety of effects on the performance of your car's engine. Signs of bad spark plugs include a rough idle, engine hesitation, hard starting, check engine light illuminated with a DTC P0300 and reduced engine power.
Have a 1999 ford expedition engine light on hesitates and loses power when you make a turn changed spark plugs wires fuel filter and o2 sensor what could be the proble?
Auto Zone will check your check engine light / computer codes for FREE... No more guessing. It could be a bad coil pack.
Why is my 2000 Chevy venture check engine light blinking?
When the engine is not firing on all cyclinders or has bad spark or lean or rich fuel it will cause the light to flash. Mine did this and I had a loss of power. I replaced the spark plugs and wires. It stopped the light and I got my power back as well as got more mpg.
My 88' celebrity is having it's checkengine light on but at about 35 mph it goes away plus it has no power and I have already changed plugs and wires and oil change what can be done?
It should post a code when the check engine light comes on after initial engine start. Use a suitable code reader/scanner to see what codes have posted, that should give you some idea what is wrong.
My 2001 kia sportage engine light stays on. Then its like the car is shaking and doesn t have power then the engine light FLASHES. help I am a women and I do not want to get milked at the mechanic?
A flashing check engine light is indicating an active engine misfire. The misfire is the cause of the lack of power and shaking. It can be caused by any number of problems, but faulty spark plugs, spark plug wires or ignition coils are most likely.
1992 f150 4.9 has power to coil and coming out of coil but no spark at plugs could this be the engine control computer almost everything else has been changed but the computer?
have you changed the pick up coil in the distributer or it could be the distributer itself
How does a car engine generate power?
the patrol enter the basins where it will fired with the power generated from the piston to the plugs
Can fouled spark plugs cause engine shaking and knocking as well as loss of power?
Yes, fouled spark plugs can cause engine shaking, and loss or power. I'm not sure about knocking but I'd guess that too.
