I am getting a 300, 301, 303 and 305 engine codes. Check Engine Light blinks. There is a Foul smell from the exhaust and at certain speeds the car shakes. Changed all sparks plugs, coils and cables with new ones from Toyota. However, problem is still there. What's puzzling is that the problem (and Engine light) seems to stay on for 2 weeks, go away for 1 week and then come back.
Please help.. already have spent a lot of money and problem is still there.
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Re: Engine Misfire issues on 99 Camry
You need to take this to a dealer, I think you may have an issue with the injector circuit, possible a defective PCM or wiring issue to the injectors, I don't think that the injectors themselves are the cause.
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Check engine light flashing means there is a bad misfire , it flashes to tell you your damaging your catalytic converter . You need to have it check , you don't won't to have to replace the catalytic converter . Can cost up to $1,000.00 . Flashing Check Engine Light CarMD
Feb 5, 2010 - Uploaded by Scotty Kilmer
Scotty Kilmer, mechanic for the last 46 years and counting, shows how to fix your car if the check engine light ...
A flashing engine light is an indication of a cylinder misfire. You need to scan engine codes to determine which cylinder is giving you the problem. Most likely a spark plug or ignition wire issue. Possibly an injector issue. If the vehicle is high mileage it may be time for a tune up which will address this misfire issue
no engine stated.??????????
303 is gross misfire on #3 cylinder. on all cars.
its a for sure thing, means bad combustion on #3 and its power is weak. 1763 is tranny The 7 means that. and is problem2.
ever get a 60k miles tunup this decade?
sparks plugs, spark wires, filters, air and fuel>?
spark plugs dont last life of any engine.
THE CEL blinking (oper guide tells) means that misfire
is burning the CAT converter to a crisp. (raw fuel + air does that)
the opr. guide says get it serviced, fast, dont drive fast or tow anything. all great advice in the glove box.
get a cheap tuneup, and magic can happen in most cases.
misfire has many causes. over 20.
but a tuneup not done, is 99% cause. (due to nobody doing them)
only fate , determines truth, not statistics....
for example you sucked a valve on #3..
if the new spark parts dont fix #3 a compression tests is next.
or an injector balance test say from #3 to one other injector.
all this is like 1hr work, but no engine stated, so.....
it is not likely to be a fuel issue ... more likely it is your spark plugs or spark plug wiring. If one of your plugs is not firing right, then that piston will not function normally and cause a violent shake in the engine. This will be more noticeable when accelerating as more fuel is pumped into the piston and is not being burned off properly. This could cause the strong smell of exhaust, as the flow of the exhaust would not be normal.
It is also possible that your timing chain has skipped a tooth, causing a misfire in your engine -- this could also cause the exhaust flow to be abnormal, giving a strong smell of exhaust when the issue occurs.
Another possibility is that you have a bad fuel injector on one of your pistons ... but this is more likely to make your engine sluggish than cause it to shake violently -- usually a bad injector does not shoot enough gas into the piston, rather than pushing too much.
There is also the possibility that you have an issue with your exhaust manifold (though this is less likely and would probably make your vehicle very loud) -- if there is a hole in the exhaust that would cause the strong smell ... and the improper back pressure could cause your engine to work badly. Once again, this is unlikely to cause a violent shake in your engine ... but it is possible, so I mentioned it.
I would first check the spark plugs, then their wiring as these are the cheapest and easiest repairs that could resolve the issue. If neither of these is the problem, check to see if your car is reporting a problem code (under the passenger side of the dash there would be a blinking light -- count the number of blinks and use that number to reference an error code). If your engine is reporting an error code, that should help you diagnose the issue. If the plugs are not the problem, and the engine is not reporting an error code, I recommend taking the vehicle in to a mechanic. A professional with the vehicle in front of them will be able to provide you with a better diagnosis.
when a check engine light blinks it indicates a catalyst damaging misfire. vehicle should not be driven when it is blinking. possible problems for the misfire could be easy like worn spark plugs or more difficult like mechanical issues with valves or bad compression.
did you put the platinum plugs back in.get a noid light test the injector wires make sure they are working . when you hook noid light up these should have a steady blink .if light dont blink just light up.you got pcm problems .if you get no lights you have open wire.besure to check ignition coils that control those misfiring cylinders.