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P0303 attack Plan

 
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Old 06 Nov 2018, 08:02 pm
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Default P0303 attack Plan

Brother's (now his) PT spit a P0303 this week and is running like crap. I pulled up the plug wire from cylinder 1 which is easily accesible and I can see oil in the spark plug well. Wonder if the cylinder 3 plug could have been damaged by also having oil in the well. I cleared the code once to see if it would come back and it came back immediately on start up.

I'm gonna do plugs and wires first on Saturday (\as I honestly don't think it's ever been done even at 175K miles). I will also change the valve cover gasket and intake manifold gaskets. I'm a firm believer of only taking everything apart once whenever possible.

Fingers crossed and hoping for the best.
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Old 06 Nov 2018, 09:03 pm
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Default Re: P0303 attack Plan

As long as you are pulling the spark plugs you might consider checking the engine compression in all cylinders. See if engine compression is low on cylinder 3.
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Old 06 Nov 2018, 09:18 pm
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Default Re: P0303 attack Plan

Good point, Steve. I don't have a compression tester though. I'm very close to many auto stores I'm sure one of them has that in their loan a tool program.
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BIG RED '01 LE 188K and counting!
Vision Cross 16x7 Rims, 205/55/16 , Painted Calipers, Spoiler, CAI
Sound System
Pioneer DEH-64BT head unit, Zapco Z400-C4SL competition amplifier, 2 RF P2D2 12's, RF P1T-S Tweets, RF PPS4-6 Mids, RF 6x8"s, AudioControl 24XS crossover/line driver

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Powerstop Z23 evolution front brakes
Sound System
Pioneer DEH-X9600BT head unit, Bē Rage 1200.6 Amp, 4 JBL GX963 6x9's, 2 Skar VVXv3-12's. 6 Channel AudioControl Matrix Plus Line Driver. Stinger fan. ACR1 Bass knob

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Old 06 Nov 2018, 10:17 pm
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Default Re: P0303 attack Plan

Quote:
Originally Posted by JonN View Post
Good point, Steve. I don't have a compression tester though. I'm very close to many auto stores I'm sure one of them has that in their loan a tool program.
Yes im pretty sure they all do, I bought one at Princess auto (Similar to harbour freight but in Canada) for like $25.
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Old 07 Nov 2018, 04:55 am
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Default Re: P0303 attack Plan

Oil in the spark plug well happens when the seal on the tube needs replaced, never caused a problem and eventually got replaced. You have to pull the valve cover to replace the seals,
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Old 08 Nov 2018, 05:23 pm
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Default Re: P0303 attack Plan

New plugs, wires, and gaskets in and it's running great again. Had some plans for Saturday come up so I broke out the big lights and did it in the dark.
rckstein and chuzz like this.
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BIG RED '01 LE 188K and counting!
Vision Cross 16x7 Rims, 205/55/16 , Painted Calipers, Spoiler, CAI
Sound System
Pioneer DEH-64BT head unit, Zapco Z400-C4SL competition amplifier, 2 RF P2D2 12's, RF P1T-S Tweets, RF PPS4-6 Mids, RF 6x8"s, AudioControl 24XS crossover/line driver

Newest Car
2016 Jeep Patriot Sport 2.4L 6 speed auto 81k
Powerstop Z23 evolution front brakes
Sound System
Pioneer DEH-X9600BT head unit, Bē Rage 1200.6 Amp, 4 JBL GX963 6x9's, 2 Skar VVXv3-12's. 6 Channel AudioControl Matrix Plus Line Driver. Stinger fan. ACR1 Bass knob

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