Rudyjr Posted July 15, 2006 Share Posted July 15, 2006 I have a 96 Camry 4cyl with 66000 miles. The car sometimes shudders at speed and then when you pull up to a light the idle fluctuates eratically the car sometimes dies.It always restarts and runs fine the problem seems to be more frequent when it is warmer outside. You can sometimes put the car in neutral and give it gas and the car will idle normally. Sometimes the problem reappears other times it runs fine. Mechanics I know have been unable to get the car to do it when they have it. I have cleaned the IAC with carb cleaner and the EGR I have replaced the coolant temperature sensor and no change. There is no check engine light. This car has been in the family since new and has run perfectly until now but I am afraid someone is going to get into an accident when it dies unexpectedly, any advice would be greatly appreciated. Quote Link to comment Share on other sites More sharing options...
Steve Posted July 15, 2006 Share Posted July 15, 2006 i had this problem with an Lexus ES300 which has the same engine.. found out it was a split hose in between the air sensor and the engine. What happens is the engine leans forward when braking causing the split in the hose to open up and let too much air in.. this caused the car to cut out.. but restarted perfectly. check the hose in between the airbox and the engine... usually a corrogated hose... squeeze and looks for splits all round. Quote Link to comment Share on other sites More sharing options...
DFBonnett Posted July 15, 2006 Share Posted July 15, 2006 My bet is that Steve is right. That being said, you might want to revisit the IAC situation. There is a possibility, however remote, that the IAC has gone bad and all the cleaning in the world will not help. You can download the appropriate manual here.. http://oregonstate.edu/~tongt/camry/index.html . The diagnostic procedure for the IAC should be in there. FWIW YMMV Quote Link to comment Share on other sites More sharing options...
Rudyjr Posted July 15, 2006 Author Share Posted July 15, 2006 My bet is that Steve is right. That being said, you might want to revisit the IAC situation. There is a possibility, however remote, that the IAC has gone bad and all the cleaning in the world will not help. You can download the appropriate manual here.. http://oregonstate.edu/~tongt/camry/index.html . The diagnostic procedure for the IAC should be in there. FWIW YMMV The hose was checked when we were working on cleaning the IAC. Thanks for the input though, this is one of the most puzzling things I have ever encountered on a car. Quote Link to comment Share on other sites More sharing options...
Leighcm Posted July 16, 2006 Share Posted July 16, 2006 Did you try replacing the fuel filter? Quote Link to comment Share on other sites More sharing options...
DFBonnett Posted July 16, 2006 Share Posted July 16, 2006 Again, you might try the IAC diagnostic procedure which is thoroughly explained in the shop manual available at the above referenced site. If it tests out OK at least there will be one possible cause for the problem off the table. FWIW YMMV Quote Link to comment Share on other sites More sharing options...
Rudyjr Posted July 16, 2006 Author Share Posted July 16, 2006 I am going to give the IAC diagnostic a try, but this is such an intermittent problem I am not sure it will tell me anything. Thank you very much for the link to the manuals what a great reference tool to have available!This is definitely one of those things that you wish would just fail altogether so that you could figure it out. Quote Link to comment Share on other sites More sharing options...
Rudyjr Posted December 21, 2007 Author Share Posted December 21, 2007 As you can see it has been a great deal of time since I posted this question on this site. I also have followed this same topic on the Toyota UK site for some time. I have tried all of the popular suggestions, the Idle Air Control theory and the coolant temperature sensor theory on the UK site. After trying many different diagnostic tests I could not come up with a difinitive problem with any of the systems on this car. It appeared to me to be similar to a vacuum leak but it was very intermittant. There were no codes present of any kind, I even questioned several dealer and independent mechanics that said this would be a very costly thing to try to narrow down. I finally figured that even though I had removed inspected and cleaned the EGR valve that this could be one item that could cause this type of problem. Severa; mechanics told me that if this was the problem that there would be a check engine light and an error code. At any rate I purchased an EGR valve and gasket at the local Toyota dealer and am happy to report that this has eliminated all problems with the vehicle and the car runs like new. The car has 80,000 miles at this time and the last 6000 miles have been symptom free since the fix. Quote Link to comment Share on other sites More sharing options...
Leighcm Posted December 21, 2007 Share Posted December 21, 2007 That's good news...glad it worked out! Quote Link to comment Share on other sites More sharing options...
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