Camry misfires and CEL P0301

[mosaud1998]

My sister and brother-in-law were going to Texas today. So, I told them I'd drop them off at O'hare airport. Their flight was for 7 am ~. I was doing maybe 85 MPH on I-90 in the Camry and all of a sudden the car started to shake badly and the CEL started flashing. I let go of the accelerator thinking maybe the trans went out or something. I pulled over to the shoulder, popped the car in neutral, and let it drive itself down to 20 MPH. Popped it back in drive and slightly gave it acceleration and everything was fine. CEL magically disappeared.

Got to the airport and checked all fluids just to make sure. Trans fluid is slightly red so that's fresh. Oil is full. On my way home. Doing maybe 65 MPH on I-90 and boom CEL comes back on. This time I let go of the accelerator ASAP. Got home and scanned the CEL. Popped up P0301 code for cylinder 1 misfire. I did the VCG and put new NGK plugs in about 2~ months ago. Could a bad coil pack cause the misfire code?

 

[Kalle.J]

Cracked spark plug maybe.

 

[mosaud1998]

Cracked spark plug maybe.

I'm gonna go check the coil and plug right now

 

[mosaud1998]

Mine was in 1978 at Shaw AFB SC. I got a ride in a RF4C......

I thought about taking the minivan but then I was like I have to move the camry out of the way to get the minivan out the garage so camry it is

 

[joekingcorvette]

I bet it's a coil pack or plug wire.

 

[mosaud1998]

That doesn't look right. I did put a bottle of Lucas gas treatment when I filled up Friday

 

[mosaud1998]

I bet it's a coil pack or plug wire.

Coil pack visually looks okay

 

[joekingcorvette]

They always look ok but you can't see what is broken inside of them. At least that's the way it was on my 05 Ford F-150.

 

[joekingcorvette]

Try a brand new spark plug and if that doesn't fix it try a new coil pack.

 

[Delta]

Where did you get the NGK's? Seem to be a good bit of NGK counterfeiting these days. Might try some dealer Denso's if it's not a coil pack.

 

[shortyb]

Swap the coilpacks around and see if the misfire moves with them. If it does, then probably a coil. If not, probably a plug or connector for cyl. 1.

 

[Astro14]

This was your wildest experience ?

That’s what I was thinking…if your wildest experience is a CEL…you’ve led a pretty sheltered life…

Look, @mosaud1998 - you need to pull the coil on cylinder 1, and check that plug and coil. Looking at it from the outside means nothing. Take a good look at the wiring going to the coil itself, a broken/cracked wire, or failed insulation on the wiring to the coil.

 

[mosaud1998]

Where did you get the NGK's? Seem to be a good bit of NGK counterfeiting these days. Might try some dealer Denso's if it's not a coil pack.

Rockauto

 

[Delta]

Rockauto

Hmmm. Not sure if there have been counterfeit ones on the Rock or not. I typically pick up plugs at the dealer or the FLAP.

 

[mosaud1998]

That’s what I was thinking…if your wildest experience is a CEL…you’ve led a pretty sheltered life…

Look, @mosaud1998 - you need to pull the coil on cylinder 1, and check that plug and coil. Looking at it from the outside means nothing. Take a good look at the wiring going to the coil itself, a broken/cracked wire, or failed insulation on the wiring to the coil.

I switched the coil pack from cylinder one to cylinder 2. Started the car waiting to see if thr CEL comes back on

 

[eljefino]

Heavy loads stress coil packs. Your lucky your issue was intermittant.

My 02 Camry blew a coil pack when I was gunning it out of a toll booth. Sadly, it didn't recover when I let off the gas. Happily, a generic $12 unit fixed it right up. But do buy genuine Denso for best results.

 

[mosaud1998]

I just drove the car hard. Kinda floored it (went up to 55 MPH and 4000 RPM) and no CEL came on with coil pack 1 switched over to cylinder 2 and cylinder 2 coil pack to cylinder 1. Not sure how long it takes for a CEL to come back on

 

[BISCUT]

Where did you get the NGK's? Seem to be a good bit of NGK counterfeiting these days. Might try some dealer Denso's if it's not a coil pack.

That was my thought. And OP, get out and live a little!

 

[joekingcorvette]

I would buy a spare coil pack because sooner or later the problem might come back.

 

[eljefino]

You should def buy a coil pack and keep a 10mm in your glovebox so you can change it.