Intermittent P0336/ constant P0300
That could definitely be your issue there.
Who knows how it happens but I have seen several sensors seep fluid through to the connector.
I've had a fuel injector do that and send fuel up the wiring and fill up the PCM with fuel
I've seen a coolant temp sensor fill up a PCM with coolant from the same thing. The internal seals go bad and sends fluid into the connector, the connector is sealed and if the sensor goes into fluid that is pressurized it will send fluid up the wiring, it's crazy ****.
You won't have that issue though, just clean it up and put another new sensor in. Or put the old one back in, I'm a tech and I've never seen one of the OEM sensors fail
Who knows how it happens but I have seen several sensors seep fluid through to the connector.
I've had a fuel injector do that and send fuel up the wiring and fill up the PCM with fuel
I've seen a coolant temp sensor fill up a PCM with coolant from the same thing. The internal seals go bad and sends fluid into the connector, the connector is sealed and if the sensor goes into fluid that is pressurized it will send fluid up the wiring, it's crazy ****.
You won't have that issue though, just clean it up and put another new sensor in. Or put the old one back in, I'm a tech and I've never seen one of the OEM sensors fail
Thread Starter
Joined: Mar 2005
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From: san antonio, tx
That is some crazy stuff right there. I went ahead and swapped the old one back in. It started up and seemed to idle a little better. I haven't been able to take it for a long drive to see if it happens again but maybe this weekend. I also checked the grounds and they're good.
Thread Starter
Joined: Mar 2005
Posts: 1,678
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From: san antonio, tx
So drove it again and still the same issues...... Im going to try one more crankshaft sensor, (delphi), and see if it gets better. Could the reluctor wheel have been damaged due to the over rev? If not, the only other thing i can think of is the PCM......
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From: Central Cal.
Only if it hit something, but then you'd have other issues.
Thread Starter
Joined: Mar 2005
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From: san antonio, tx
Super unlikely it did anything to the reluctor but I would take a real good look at it with the crank sensor out. Spin the crank around and look for the wheel to be bent (doesn't run straight) dinged, or anything but perfect
Thread Starter
Joined: Mar 2005
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From: san antonio, tx
Ill try and see if I can check it once i get the sensor out.
Thread Starter
Joined: Mar 2005
Posts: 1,678
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From: san antonio, tx
Ok... I removed the crank sensor and took a look at the reluctor wheel while i turned it. Looks good to me. I also stuck my finger in there and spun it too see if i felt anything odd, nothing...... I swapped in the new crank sensor. Started up, but when i took it for a test drive it started popping and misfiring BAD! I was lucky to get it back into the garage. And now this time, the car dies when i press the clutch in while in neutral or in gear. No SES light popped up but it did have the p0336 and p0300 in there like always. Could it be the ECU that is going or gone bad??? This is driving me nuts!! Going to swap in the old crank sensor again......
Last edited by blkbird; Dec 28, 2019 at 04:44 PM.
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Not CKP related but have you pulled the valve covers to take a looksey? I’d rule out bent pushrods, broke springs before I went further. Easy diagnostic that’s free to try...
Thread Starter
Joined: Mar 2005
Posts: 1,678
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From: san antonio, tx
Did that already and all is good. Here is the funny thing, when i put the old crank sensor in, I shimmed it with a small washer. I also pulled the ECU and checked the continuity from the crank sensor to the connector and reseated the connectors on the ECU and then put it back in place without the plastic "holder" it sits in. Took it for a short ride around the block and then later checked the codes again and the P0336 went away without me clearing it...... WTF..... right.....
Did that already and all is good. Here is the funny thing, when i put the old crank sensor in, I shimmed it with a small washer. I also pulled the ECU and checked the continuity from the crank sensor to the connector and reseated the connectors on the ECU and then put it back in place without the plastic "holder" it sits in. Took it for a short ride around the block and then later checked the codes again and the P0336 went away without me clearing it...... WTF..... right.....
Thread Starter
Joined: Mar 2005
Posts: 1,678
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From: san antonio, tx
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From: Central Cal.
Did that already and all is good. Here is the funny thing, when i put the old crank sensor in, I shimmed it with a small washer. I also pulled the ECU and checked the continuity from the crank sensor to the connector and reseated the connectors on the ECU and then put it back in place without the plastic "holder" it sits in. Took it for a short ride around the block and then later checked the codes again and the P0336 went away without me clearing it...... WTF..... right.....
Thread Starter
Joined: Mar 2005
Posts: 1,678
Likes: 14
From: san antonio, tx
TECH Senior Member
Joined: Jun 2016
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From: Central Cal.
I have fixed a few cars in my day by unplugging the PCM and plugging it back in. It is a thing...
Connections get slightly corroded, to the point you may not be able to even see it in those tiny pins, from sitting in one spot for years. Unplugging and replugging actually scrapes the pins a little and restores the connection.
Connections get slightly corroded, to the point you may not be able to even see it in those tiny pins, from sitting in one spot for years. Unplugging and replugging actually scrapes the pins a little and restores the connection.
Thread Starter
Joined: Mar 2005
Posts: 1,678
Likes: 14
From: san antonio, tx
I have fixed a few cars in my day by unplugging the PCM and plugging it back in. It is a thing...
Connections get slightly corroded, to the point you may not be able to even see it in those tiny pins, from sitting in one spot for years. Unplugging and replugging actually scrapes the pins a little and restores the connection.
Connections get slightly corroded, to the point you may not be able to even see it in those tiny pins, from sitting in one spot for years. Unplugging and replugging actually scrapes the pins a little and restores the connection.
