P300 and P0340 while cruising?

[acidbug]

Well, no offense to acidbbg, but it's not like I went directly to him and asked specifically for his help.

When you post in an open forum..and ask for help...you shouldn't bash me for giving my suggestion..

Well, I don't think that's it, and I was simply asking for justification. Chas just shouldn't jump to the conclusion of "Sounds like that new intake cam you put it might be causing some problems." without so much as an explanation.

Well the explanation is simple..YOu install a NEW CAM & you get a CEL that says something about your Camshafts

P0340 (Camshaft Position Sensor Circuit Malfunction).

Well as arcam law states.."The Simplest answer is usually the right one!"

chas.

p.s. thanks for deleteing my previous post(no)

 

[Kooldino]

When you post in an open forum..and ask for help...you shouldn't bash me for giving my suggestion..

I first questioned your reasoning, which you weren't able to back up.

Well the explanation is simple..YOu install a NEW CAM & you get a CEL that says something about your Camshafts

...but I installed the new cam in like June. And if you understood how it worked, you'd know why that doesn't matter.

p.s. thanks for deleteing my previous post(no)

PS, thanks for crapping on my thread.

Anyway, back on topic.

 

[DiS]

I doubt that J-spec intake camshaft can cause these codes to popup. As Kooldino said, he installed the camshaft in June. I installed same j-spec camshaft in past June, at his garage with his help. I never had that problem, that Kooldino is experiencing. So therefore, for rational explanation, this camshaft cant cause the problem.

 

[Mr. Win]

Its cause you had no idea what your talking about... im not saying im a pro but your deductive reasoning was nothing more then a guess and creating a stupid lil flame war sloves nothing.

P.S. I havent spoke to jeff yet.

When you post in an open forum..and ask for help...you shouldn't bash me for giving my suggestion..



Well the explanation is simple..YOu install a NEW CAM & you get a CEL that says something about your Camshafts



Well as arcam law states.."The Simplest answer is usually the right one!"

chas.

p.s. thanks for deleteing my previous post(no)

 

[mp5jeff]

hey, actually it's my 3rd crank angle sensor that's in the car now, the 1st one went bad and i replaced it and that one ****** up a week later, then the one that's in there now has been in the car for a longtime, but i dont know whats up with your cam sensor prob, sorry

 

[DiS]

Kooldino, I cant make it this Saturday bro. I gotta go do my tax returns with my parents. Maybe next weekend?

 

[Mr. Win]

yea so i off a little bit... my bad dana.

 

[Kooldino]

hey, actually it's my 3rd crank angle sensor that's in the car now, the 1st one went bad and i replaced it and that one ****** up a week later, then the one that's in there now has been in the car for a longtime, but i dont know whats up with your cam sensor prob, sorry

Ahh, you're talking about the sensor with the wire that goes on the belt side of the crank.

Was there noticable damage to it?

 

[1FASTMP5]

it's NOT the cam. hell, i ran both the j-spec intake cam dana has and the mazdaspeed exhaust with No problems.... over 15,000 miles boosted

dana are you running a open vent bov? how does the car feel when this happens?!?!?! bogging at all?!?!?!

what spark plugs are you running and @ what gap? has this ever happened in the summer months?

if i remember correctly you are only running low boost for the winter....right?
so have you swaped to different plugs? i would suggest a heat range (6) by ngk and open the gap a little....see what she does. you souldnt have any issues blowing out spark with the lower boost. once summer rolls back & boost goes can go back up, you can swap back.

 

[Kooldino]

it's NOT the cam. hell, i ran both the j-spec intake cam dana has and the mazdaspeed exhaust with No problems.... over 15,000 miles boosted

Werd, my point exactly.

dana are you running a open vent bov? how does the car feel when this happens?!?!?! bogging at all?!?!?!

Nah, it's recirculated. But I don't even have to be boosting, I can do it in neutral...i'll rev the motor and it will break up in the upper RPMs. The longer it's been running, the higher the RPM it will break up at.

what spark plugs are you running and @ what gap? has this ever happened in the summer months?

I just put in new plugs, which are the NGK BK6F or whatever, gapped @ .030.

Nope, this has never happened in the summer months. However, I also had this problem last winter.

if i remember correctly you are only running low boost for the winter....right?

Yup, 11psi.

so have you swaped to different plugs? i would suggest a heat range (6) by ngk and open the gap a little....

That's exactly what I did. I normally run a .028.

Over the past couple of days, I...

-Put in new plugs
-Tried different wires
-Tried different coils

Yet still, the exact same thing happens.

 

[Installshield 2]

I was just thinking of a scientific law..forgot the name..but it goes somethng like this..

"The easiest answer is usually the right answer"

Occam's Razor...and its not a law, its a principle that some use to solve difficult problems...

 

[Installshield 2]

Dana...I am lost...The cam itself, as many have mentioned, would not cause this problem...

My bet is something with the MPi and triggering (i.e. Cam and crank sensors being out of sync...)...But I don't know how the MPi is wired, so I really don't know...

Obviously you are positive you have your cam timing correct though right?...That would throw an MIL right after installation most likely, and you would definately notice a poor engine if that was the case...but just wanted to be sure...

I would go with what you did...install a new cam sensor...hopefully that is all you need...and check your ignition system...hell it could be bad wires or something, or like you mentioned, bad plugs...

 

[Kooldino]

Dana...I am lost...The cam itself, as many have mentioned, would not cause this problem...

Word.

My bet is something with the MPi and triggering (i.e. Cam and crank sensors being out of sync...)...But I don't know how the MPi is wired, so I really don't know...

That was one of my initial questions, but Tim said that's not possible. My guess is that the ECU is expecting a certain value, and when it breaks up and doesn't get what it expects, it throws that 340 code on occasion.

Obviously you are positive you have your cam timing correct though right?...

Yup.

I would go with what you did...install a new cam sensor...hopefully that is all you need...and check your ignition system...hell it could be bad wires or something, or like you mentioned, bad plugs...

I haven't installed the new cam sensor, because I realized they want more than they initially thought. It's about $130 for the sensor, so before ordering it, I'll have to borrow DiS's (or anyone else nearby on the forums?) for 5 mins to make sure it fixes it. I'm expecting it NOT to fix it, and I don't wanna spend all of that money just to find out.

Today, I'm going to pull the MPI out of the harness and jump the wires that it needs, just to make sure that's not messing with anything.

 

[Kooldino]

Yesterday, I changed out my plugs. The plugs that were all in there looked fine, with the exception of Cyl 4 (the driver's side plug). It had a green tinge on it which makes me think it was detonating.

Today, I pulled out all of the injectors and cleaned their seats, etc, just to make sure it was all ok.

While I had the fuel rail off, I noticed that there was a vac line with a slight rip in it, which I replaced with my fancy blue vac hose. See the attached pic with the red arrow.

 

[Kooldino]

Here's a video displaying my problem. This was taken a half hour ago, after I did everything. I had to ZIP it, and it's in .MOV format.

If you don't wanna install Apple Quicktime, use this non-Apple version...

http://www.free-codecs.com/download/QuickTime_Alternative.htm

After I took this vid, I gave it a hard drive around, WOT, but never past 5300rpm. Unfortunately, I still ended up with a P300 (random/multiple cyl misfire).

 

[DiS]

thats ******* weird dude. If I will get my car back this week, Ill cruise down to you this Saturday and we can try out my sensor

 

[igdrasil]

can you double check that?? Because my car has an eternal CEL. I scanned the codes and it showed CRANKSHAFT SENSORMALFUNCTION.

Although my car runs fine, I dont know whats happening.

 

[igdrasil]

Also, ask for the cam sensor in the forum, I gave it along with the valve cover for free to some people here. I dont think they need them. I can try looking for a spare one here around.

The cam sensor, which is placed on the exh. cam, its only used for fuel injection timing. The sensor could be the problem.

let me know.

 

[Kooldino]

can you double check that?? Because my car has an eternal CEL. I scanned the codes and it showed CRANKSHAFT SENSORMALFUNCTION.

Although my car runs fine, I dont know whats happening.

What do you need me to double check?

 

[Kooldino]

Also, ask for the cam sensor in the forum, I gave it along with the valve cover for free to some people here. I dont think they need them. I can try looking for a spare one here around.

You mean I should post a thread to see if anyone has a spare? That's not a bad idea, but I should wait to borrow DiS's first.

The cam sensor, which is placed on the exh. cam, its only used for fuel injection timing. The sensor could be the problem.

Where did you hear that it was used for injector timing? Because if that IS the case, then it shouldn't matter, since the error occurs at higher RPMs, where the injectors are firing in batch (not sequential), right?