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Old 11-30-2009, 01:04 PM   #1
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Failed My Emission test

I went to take the emission test today, to register my 2002 Tacoma that i just bought.

I had problems.

First of all the Engine Light is not turning on.

Does anybody know how to check this? maybe is the Light bulb or a cable that is disconnected.

Also i got 2 codes:

P0300: Random/Multiple Cylinder Misfire Detected
P0301: Cylinder 1 Missfire Detected.

Please Help I need to register my truck ASAP.
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Old 11-30-2009, 02:13 PM   #2
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X2 to change the plugs and wires. Does the CEL come on when you turn the key to the ON position (not actually starting it)?
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Old 11-30-2009, 02:34 PM   #3
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Quote:
Originally Posted by johnv View Post
Change out your spark plugs to the Dual Ground Electrode type Rec'ed by Toyota and maybe the wires too,usually not using the those type spark plugs cause misfires and may damage the coil packs.
X3. And gap both sides of the plug to .040 to .042
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Old 11-30-2009, 02:48 PM   #4
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Quote:
Originally Posted by 98tacoma27 View Post
X2 to change the plugs and wires. Does the CEL come on when you turn the key to the ON position (not actually starting it)?
The funny thing is that the Fuel light nor the CEL come on when i turn the key to the on position.
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Old 11-30-2009, 02:50 PM   #5
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Quote:
Originally Posted by johnv View Post
Change out your spark plugs to the Dual Ground Electrode type Rec'ed by Toyota and maybe the wires too,usually not using the those type spark plugs cause misfires and may damage the coil packs.
I will change the spark plugs, I am not very familiar with this truck since i've only had it for 5 days, my other car is a 67 mustang and the sparkplugs are so easy to change.

Is there a manual to change the spark plugs for this truck? also do i need to reset something after i do that? Thanks
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Old 11-30-2009, 02:54 PM   #6
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Fairly straight forward. Do them one at a time to avoid mis wiring them. There is nothing that will need reset.
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Old 11-30-2009, 02:56 PM   #7
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Dash take apart instructions
http://www.ncttora.com/fsm/2003/Repa...nspan/remo.pdf
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Old 11-30-2009, 02:57 PM   #8
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Quote:
Originally Posted by 98tacoma27 View Post
Fairly straight forward. Do them one at a time to avoid mis wiring them. There is nothing that will need reset.
Ok thanks i will try that. Any suggestions about the Check Engine Light ?
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Old 11-30-2009, 02:59 PM   #9
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I think there are a few bulbs in there that might need replaced. It's been a while since I have had one of them apart.
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Old 11-30-2009, 03:02 PM   #10
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Ok i will try to take it apart and replace the bulbs and see what happens.

Also i got another code the other day.

"System to rich" This didn't came up today in the emission test but it came out the day i bought this truck could this be related to the other codes?
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Old 11-30-2009, 03:09 PM   #11
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It is possible that it through that code due to the misfire.
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Old 11-30-2009, 03:10 PM   #12
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Ok i will change the spark plugs, change the CEL light bulb clean the MAF and see what happens.
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Old 11-30-2009, 03:13 PM   #13
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Sounds like a good plan.
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Old 11-30-2009, 03:16 PM   #14
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Quote:
Originally Posted by gmata View Post
Ok i will try to take it apart and replace the bulbs and see what happens.

Also i got another code the other day.

"System to rich" This didn't came up today in the emission test but it came out the day i bought this truck could this be related to the other codes?
Stands to reason if the plugs are fouled. They wouldn't burn all the fuel, and the result would be a rich condition.
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Old 12-01-2009, 07:20 AM   #16
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Whats an emissions test??

The only cool thing about ohio is no emission testing bullsh*t, at least not all counties.
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Old 12-01-2009, 09:29 AM   #17
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One more thing before i take my dash apart, Would i be able to find the light bulbs dor the CEL and the Gas Light at an AutoZone? or do i need to order them from somewhere else?
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Old 12-02-2009, 01:47 PM   #18
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All right guys this is really frustrating.

I took the dash apart and found out the CEL bulb was completly missing, they removed it on purpose

So that problem is fixed, then i changed the sparkplugs they weren't that bad, they were all double's expept for one, Cylinder number "1" i got the Code P03001 Cylinder 1 missfire detected. So i was pretty sure that was the problem. I got the scnanner hooked up and cleared all the codes .

I started driving to the Emission test center and literally as soon as i was going thru the Check Engine light comes on again . Exactly 19.6 Miles.

I went to Autozone and i they checked it for me, again the exact same codes. P0300 and P0301.

So my question is, what else can i do? i want to start by the cheap solutions since i don't have alot of money. But i need some help fast, i can't register my car if i don't fix this and this is my only vehicle.

Thanks!
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Old 12-02-2009, 03:33 PM   #19
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Hmm, the next thing I would check is the spark plug wire for that cylinder.
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Old 12-02-2009, 05:03 PM   #20
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Yes, I do get 60 days to register the vehicle, i have replaced all spark plugs with Bosh Dual Platinium.

The wires Uhm i will check on that they look pretty good, i will check them anyways.

I have also celaned the MAF just in case, see what happens.
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