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Old Apr 27, 2014 | 10:57 AM
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onehundred80
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Joined: Apr 2006
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From: Ontario
Default Re: NA Misfires, shudders, stalls

Originally Posted by Charismatism
Haven't been home this weekend, drove an hour away in my daily driver and the transmission went out as soon as I got to where I was going.. I don't care but this leaves me without a car at all until I can get my Crossfire going, which feels unlikely in a timely period..

Before I left I looked under the hood and noticed that the coil pack on the passenger side front of engine (I believe cylinder 1?) was fairly loose on the valve cover, didn't have my computer with the service manual nearby so I didn't want to mess with it without knowing the proper torque specs. But this gives me the idea that the car had been neglected by service techs or previous owners in the past.

But what I don't understand is that several random cylinders will misfire, and it seems that they will not fire again until the car is shut off and started back up. The first time this happened a week or so ago I had 5 cylinders misfire, and I drove home on the 1 that was still firing. Took my girlfriend out for supper Wednesday evening, not a mile out of town and 3 cylinders misfired and I drove home easier on the other 3. Since that was my first time driving the car since the first scenario, the MIL was cleared. But it came on blinking a few times, and as soon as it stopped I lost those 3 cylinders. I don't have my freeze frames with me as I'm not back home yet, but I'll update that when I get back..

On top of both my cars failing this week, having this flu bug that's going around, and some other personal issues.. I'm losing motivation fast.. I can only hope the town mech won't need a DRB3 to look at my car.

EDIT: I forgot to add that when the car takes a second or third try to start, the code P0410 (2nd air inj system) is given and lights the MIL. I don't know what purpose the air pump really serves but I'm doing some research on the service manual about it now.
Misfires have been cured by replacing the crankshaft position sensor, fuel pump, air leaks, fuel filter etc.
The secondary air problem is caused by the solenoid in the RCM getting burnt or a bad contact in the secondary air pump wiring.
The vent control is the solenoid on the system failing I think. It is under the hood on the fender in front of the driver if I recall correctly.
 

Last edited by onehundred80; Apr 27, 2014 at 11:01 AM.
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