Question about 1999 Toyota Camry

1 Answer

Engine Misfire issues on 99 Camry

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.

Posted by on

  • Anonymous Mar 30, 2014

    There is a loud humming noise coming from the engine. When sitting at a traffic light while holding the brake paddle down, the car will shake/tremble something awful. The car has had a front end alignment, replaced spark plugs, and the fuel injector for the number 4 spark plug has also be replaced, because of the dumping of fuel on that plug. Two weeks later it is doing the same thing. Number is getting wet from fuel.



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.


    An expert that got 20 achievements.


    An expert that got 10 achievements.

  • Toyota Master
  • 77,514 Answers

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.

Posted on Dec 02, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

Check engine light flashing check engine soon smell of gas and not running smouth

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 03, 2016 | 2004 Cadillac Deville

1 Answer

Starts up but runs rough, exhaust smells, and when you give it gas it wants to shut off.

How To Fix P0300 random misfire codes in your car ...

? 2:56
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 ...

P0300 - OBD-II Trouble Code - RepairPal > Encyclopedia > OBD II Codes
OBD II Fault Code. OBD II P0300. Fault Code Definition. Random, Multiple MisfireDetected. Symptoms. Check Engine Light flashing; Rough running, hesitation ...

P0300 - Check Engine Light Diagnostic Trouble Code ...
The misfire detection monitor, a software strategy built into the computer, is designed to detect an engine misfire. The computer can also normally identify the ...

Random-Misfire Page

Jan 24, 2016 | Cars & Trucks

1 Answer

Service engine light constantly blinking when driving. Going up a hill acts like it don't want to pull. car pooting while I excellerate the engine. I smell like something in my exhaust.

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

Jun 13, 2015 | 2001 Chevrolet Chevrolet Blazer

2 Answers

P1763 and p0303 codes for my 02 jeep grand cherokee. car is super sluggish and shakes when gets to 50mph.

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.....

Apr 24, 2015 | 2002 Jeep Grand Cherokee

1 Answer


chances are when you fix the check engine light the smell will go away too. the fuel delivery to the engine cylinders is not correct causing the vehicle to run too rich or too lean. you need to find out what code{s} have turned on the check engine light. If you continue to drive you could increase the cost of the repair so get it checked quick.

Jan 24, 2013 | 2003 GMC Yukon Denali

1 Answer

1999 mercury cougar engine is bucking and check engine light blinking and foul odor

very possible convertor is plugged have local muffler shop check temp difference between convertor an exhaust ppipe also check fuel pressure

Jun 25, 2012 | 1999 Mercury Cougar

1 Answer

Diagnostics with no codes available despite obvious issues and a blinking check engine light?

i would look for a poor conection possibly a ground at or near the ecm
or the ecm itself if all the conections are ok try a replacement ecm from a wrecking yard

Feb 06, 2012 | 2001 Pontiac Bonneville

1 Answer

I have 2001 Silverado 4.3 liter, with a manual transmission. Today I started the truck up and it sputtered, and as I tried to drive it, it shook violently. I could smell exhaust noticeably, and the check...

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.

Jun 03, 2011 | 2001 Chevrolet Silverado 1500

Not finding what you are looking for?
1999 Toyota Camry Logo

714 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts


Level 3 Expert

77499 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8826 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides