P0446 and Acceleration Vibration / Jerking
Thread Starter
Driver School Candidate
Joined: Jan 2011
Posts: 4
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From: OH
P0446 and Acceleration Vibration / Jerking
The Patient: 1999 RX 300 with 210,000 miles
The problems:
1.) Under normal acceleration, at times it will act like the power is of/on like a light switch. It's not a miss, it's more like a surge off/on. This typically happens in 2-3 gear.
2.) Under acceleration, the engine is very rough. This may actually be the transmission and not the engine, I don't know for sure.
3.) Noticed that the headlights flicker.
4.) Only code that keeps coming back is P0446, no others (I have an Actron CP9145 I keep in the car)
What I have done to the vehicle since purchasing it a month ago:
1.) Oil change with Mobil 1 and a pint of MMO
2.) Pulled front Oil Control Valve and cleaned (did have misfires on all front cylinders) gone now.
3.) New PCV Valve / Air Cleaner
4.) New NGK Plugs (OEM recommended)
5.) Pulled front valve cover and oil pan/pickup to check for sludge and they was as clean as one would expect for the mileage)
I really like this vehicle and would like to get these bugs worked out. If anyone can offer suggestions on what to check for I would appreciate it.
Thanks in advance!
The problems:
1.) Under normal acceleration, at times it will act like the power is of/on like a light switch. It's not a miss, it's more like a surge off/on. This typically happens in 2-3 gear.
2.) Under acceleration, the engine is very rough. This may actually be the transmission and not the engine, I don't know for sure.
3.) Noticed that the headlights flicker.
4.) Only code that keeps coming back is P0446, no others (I have an Actron CP9145 I keep in the car)
What I have done to the vehicle since purchasing it a month ago:
1.) Oil change with Mobil 1 and a pint of MMO
2.) Pulled front Oil Control Valve and cleaned (did have misfires on all front cylinders) gone now.
3.) New PCV Valve / Air Cleaner
4.) New NGK Plugs (OEM recommended)
5.) Pulled front valve cover and oil pan/pickup to check for sludge and they was as clean as one would expect for the mileage)
I really like this vehicle and would like to get these bugs worked out. If anyone can offer suggestions on what to check for I would appreciate it.
Thanks in advance!
Pole Position
Joined: Sep 2006
Posts: 3,054
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From: Sacramento, California
Thread Starter
Driver School Candidate
Joined: Jan 2011
Posts: 4
Likes: 0
From: OH
Okay, I think I found the solenoid. I have it in a red box in the image. I tested the resistance and I had 32Ohm @ 50 degrees. Alldatadiy says: Resistance: 27-33 Ohm at 20°C (68°F).
I also tested between each terminal and the solenoid body and had no continuity.
Did I do this right? Normally it takes a day or two for the CEL to come on. If I pull the codes prior to the CEL coming on I usually have a P0446 p/d. After the light comes on and I pull the codes I have a hard P0446 and a P0446 p/d.
And ideas?
Thanks!
I also tested between each terminal and the solenoid body and had no continuity.
Did I do this right? Normally it takes a day or two for the CEL to come on. If I pull the codes prior to the CEL coming on I usually have a P0446 p/d. After the light comes on and I pull the codes I have a hard P0446 and a P0446 p/d.
And ideas?
Thanks!
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tjwashow
LS - 3rd Gen (2001-2006)
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Jun 27, 2013 11:42 AM
