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Constant shudder in overdrive when slightly decelerating Forums > > Constant shudder in overdrive when slightly decelerating Constant shudder in overdrive when slightly decelerating
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Frontier Nissan Frontier/HB/Truck Discussion Forum

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  #1  
Old 03-11-2008, 03:28 PM
Dr.Theopolis
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Default Constant shudder in overdrive when slightly decelerating

I have narrowed down the problem below

Original Post:

I have a 2001 Frontier XE 4 cylinder. It shudders and vibrates really bad under some specific circumstances. It seems to run great in the lower gears...but as soon as it goes into overdrive and anywhere from about 40-70+ mph...if I just barely let off the gas and slightly decelerate, it shudders really bad and does it until I start accelerating again. I had codes P0302 and P0402. I changed all the spark plug wires and plugs. I cleared the codes. P0302 came back in less than a day. Any ideas of easy things I can check before having to put it in the shop would be appreciated.

Update:

I disconnected the vacuum hose from the top of the EGR valve. The problem GOES AWAY. So now I need to narrow down to either EGR valve iteslef, EGR-BPT valve (whatever that is for), and the EGR solenoid valve. If anyone has any suggestions, please let me know. THANKS!

Update:

Gee, you all are a lot of help! :-)

Last edited by Dr.Theopolis; 03-21-2008 at 08:32 AM. Reason: more information found
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  #2  
Old 06-21-2008, 05:57 AM
vpnavy's Avatar
vpnavy vpnavy is offline
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2015 Rogue
 
Join Date: Mar 2007
Location: York, PA
Posts: 2,138
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Quote:
Originally Posted by Dr.Theopolis View Post
I have narrowed down the problem below

Original Post:

I have a 2001 Frontier XE 4 cylinder. It shudders and vibrates really bad under some specific circumstances. It seems to run great in the lower gears...but as soon as it goes into overdrive and anywhere from about 40-70+ mph...if I just barely let off the gas and slightly decelerate, it shudders really bad and does it until I start accelerating again. I had codes P0302 and P0402. I changed all the spark plug wires and plugs. I cleared the codes. P0302 came back in less than a day. Any ideas of easy things I can check before having to put it in the shop would be appreciated.

Update:

I disconnected the vacuum hose from the top of the EGR valve. The problem GOES AWAY. So now I need to narrow down to either EGR valve iteslef, EGR-BPT valve (whatever that is for), and the EGR solenoid valve. If anyone has any suggestions, please let me know. THANKS!

Update:

Gee, you all are a lot of help! :-)
Did you ever get your problem fixed?
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  #3  
Old 11-09-2019, 02:02 PM
sidclaim sidclaim is offline
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2002 Frontier King Cab
 
Join Date: Aug 2019
Posts: 1
Default 02 Nissan Frontier

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Originally Posted by vpnavy View Post
Did you ever get your problem fixed?
Did you get the vibration fix? I have the same problem, P0302 , bad or rough idle. Replace a lots of parts to include plugs, wire, cap, rotor cap, injector, fuel regulator, IAC, mac sensor and throttle sensor. After replacing EGR valve and solenoid, Idle is steady but vibrates at 40-55mph while driving. P0302 sometimes show up.
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