Auto-Rx Topics & Results

Visit Auto-Rx® Home Page
Members Login
Post Info TOPIC: Code P1354, rough idle, excessive fuel consumption, sudden deceleration with warm engine after adding Auto-Rx


Newbie

Status: Offline
Posts: 3
Date:
Code P1354, rough idle, excessive fuel consumption, sudden deceleration with warm engine after adding Auto-Rx
Permalink  
 


I suddenly started getting the above symptoms on my 2002 Toyota Sienna while I was driving on the highway last week.

The engine has 120k miles on it and I added 2 bottles of Auto-Rx to the oil about 800 miles ago or so - primarily to fix some seal leaks that started after switching from mineral to synthetic a while back.

Went to the dealer and without me telling him about the Auto-Rx, they quoted me over $2000 for a possible VVTI sprocket change.

I told them this is way over my budget and the car was running perfectly fine until 5 days ago when I started getting the symptoms. The dealer mentioned sludge which prompted me to do some research and found out that P1354 may be caused by the OCV valve which may be clogged so I made the connection with the Auto-Rx I just added a couple of months ago.

Since I poured two bottles of Auto-Rx I am thinking the cleaning process must have been pretty intense and a lot of clogging may be happening now due to that so I am planning to flush the oil ASAP without touching the OCV yet.

Are these symptoms to be expected given the situation?

Any suggestions on what to do next?

 

 



-- Edited by pacificstart on Wednesday 3rd of January 2018 05:53:24 PM

__________________


Moderator

Status: Offline
Posts: 253
Date:
Permalink  
 

What exactly are the symptoms? Does the engine run differently or is the concern just the with the engine trouble code?

__________________


Newbie

Status: Offline
Posts: 3
Date:
Permalink  
 

The symptoms are: - sudden engine cut-offs noticed on highway - rough idle when the engine is warm and idling at 1200-1400 rpm instead of the usual 7-800 rpm - noticeable loss of power especially when going uphill - starts ok in cold temperatures - fuel consumption went through the roof

__________________


Senior Member

Status: Offline
Posts: 242
Date:
Permalink  
 

It sounds like the variable timing is stuck in its current position. From what I understand there exists a locking pin that engages to adjust the timing based on throttle demands. Of coarse the whole system operates off of oil flow and pressure. There was a recall on the tubing ore hoses attached to the oil control valves. And most folks with VVT issues are at cold starts. I am not sure of your model but there exists a screen type filter pre-OCI valve on most. It may be possible that yours is clogged or blinded to the point whereby there isnt enough oil flow to operate the system.

It is unlikely that in just 800 miles of operation you would have had time to dissolve enough sludge to fill your oil filter, unless you had a high level of soft pudding type sludge down in the oil pan. And if so then perhaps. If the main oil filter is blinded then oil would be flowing around the oil filter and not being pumped normally to operate this system. Perhaps that would be my first remedy suggestion to check out. Second would be the viscosity of the oil that you are running. Is it in spec for your motor. Tooo much viscosity will cause erratic VVT operation.

Regarding the oil leaks that you were addressing. Where they cam or crank seals? Or perhaps it could be failed VVT hoses. It is unlikely that your VVT sprockets are bad, with relatively low miles at 120K. It is either an oil flow issue, which ARX may correct. Or perhaps the locking pin(s) wont release. It sounds like the cam(s) is stuck in an advanced position.

I would start with the main oil filter first.

__________________
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.

Tweet this page Post to Digg Post to Del.icio.us