See a great deal of new and old Toyota car and truck content at the rest of Toyoland!

Recent Posts

Pages: 1 2 [3] 4 5 ... 10
Toyota! (and Lexus and Scion) / Re: 2003 Matrix won\'t idle down
« Last post by renojim on February 15, 2011, 11:26:15 PM »
Just for closure, it was the throttle body.  While I doubt many, if any, others will have the same problem, the problem was the throttle plate getting stuck on the throttle body.  As it opened it moved slightly off center, then when it closed it rubbed against the throttle body, wearing a small indentation into the throttle body, and got stuck.  For some reason, it only happened while driving.  I could move it back and forth by hand and it would never happen.  I fixed it by adding a spacer (a thin washer I pounded out of a loop of wire) around one end of the throttle plate shaft.  It keeps the throttle plate from moving off center.  Hopefully it won\'t fall off.

fishexpo101, thanks for all the help!

Toyota! (and Lexus and Scion) / Re: 2003 Matrix won\'t idle down
« Last post by renojim on February 11, 2011, 02:15:48 AM »
Thanks for all the help!  At this point I\'m tempted to say it is the throttle body.  It appears that there is a worn spot that the throttle plate is getting hung up on that prevents it from closing the whole way.  I\'m thinking if the return spring was stronger it would force the throttle plate past that point, but I don\'t know if such a thing exists.  Seems a shame to replace the whole throttle body for something so simple.

Toyota! (and Lexus and Scion) / Re: 2003 Matrix won\'t idle down
« Last post by fishexpo101 on February 08, 2011, 09:48:26 PM »
Yeah, that throttle plate should be pretty much closed all the way.  There is a bleed bypass hole that exits behind the throttle plate - that will allow enough air through to idle purposes.   I agree, not worth taking the throttle body apart, unless you know that is the problem.  The spring might not be the part to worry about, more likely I\'d worry about damaging the sensitive TPS sensor.

Throttle bodies, in general, do not go bad.  Mechanically, they are pretty simple.  Usually it is the electronics, like the TPS sensor, that could be offset or reading incorrectly, causing the car to mis-read how far the plate is open.  That would definitely cause idle issues as well as driveability issues.  From your description, could be as simple as the idle stop screw was messed with by accident.
Toyota! (and Lexus and Scion) / Re: 2003 Matrix won\'t idle down
« Last post by renojim on February 05, 2011, 02:13:17 AM »
Thanks for the suggestions.  I had checked the cables for binding earlier and they look ok.  I thought I found the problem when I took the hose off from the throttle body to the air cleaner box and saw that the vacuum hose to the air cleaner box was disconnected.  It probably happened when she took the car to Walmart for an oil change and they changed her air filter.  Reconnecting it didn\'t make a difference.  I gave the throttle body and idle control a good cleaning, but it didn\'t make much of a difference.  It looks like the throttle plate may not be closing the whole way, but it\'s very close.  It might stop about a millimeter or two before it hits the idle stop screw.  Forcing it the rest of the way does get the idle to go down.  The only way I could clean it any better is to take apart the throttle plate mechanism and I\'m a little afraid that either the return spring will go flying or be impossible to get back on.  Throttle bodies don\'t go bad, do they?  I\'ll give taking the mechanism apart a try if you think it\'s worthwhile.

I suppose the ISC valve could have a problem, but I\'m not sure how I\'d figure it out without trying a new one.

Thanks for your help,
Toyota! (and Lexus and Scion) / Re: 2003 Matrix won\'t idle down
« Last post by fishexpo101 on February 04, 2011, 07:58:56 PM »
Sounds like there is some obstruction in the throttle body (carbon deposits or varnish that is gumming up the throttle plate) or the throttle cable is stuck or binding.  Could at the accelerator pedal (linkage), the throttlebody side (cable end frayed and hung up on a bracket), or \"stuck\" inside the cable jacket due to corrosion or obvious side of cable damage (cable kinked or bent).  

I\'d start by inspecting the throttle body, give it a good cleaning can\'t hurt.  Sometimes if it is really clogged up, the ICV valve (Idle-Control Valve) can get gummed up so badly, that it will act like the pedal is stuck.  If it is related to the throttle cable, sometimes spraying a lubricant down the cable jacket (disconnect one end, spray in lubricant and let it wick all the way through) and see if it that helps.
Toyota! (and Lexus and Scion) / 2003 Matrix won\'t idle down
« Last post by renojim on February 04, 2011, 10:31:47 AM »
Hi all!  I\'m trying to help out a friend of mine.  She has a 2003 Matrix with the 2zz engine and it won\'t idle down, even after it\'s warmed up.  When you come to a stop and push in the clutch the engine races to 4000+ RPM (seems to be getting worse; it used to be around 3000).  If you mash on the accelerator it will idle down to around 1000, which I assume is normal.  I have it for the weekend and told her I\'d take a look at it.  Any thoughts as to what I should look for?

Toyota! (and Lexus and Scion) / Re: Starter
« Last post by myprizm on January 31, 2011, 09:12:07 PM »
Thanks a lot,
Since I was cleaning batery posts so most likely all codes from the initial malfunction are gone. I will check it the next time when this happen.
Also looks that ECM on this car is located under the instrument pannel. Some inside covers must be removed.
Toyota! (and Lexus and Scion) / Re: Starter
« Last post by toyodave on January 31, 2011, 07:56:33 PM »
Security systems have made things \"less simple.\" My guess is there\'s some sort of security system in there designed to prevent what you\'re doing.

Did you check for computer codes? As I recall Nissan keeps the computer underneath the front seat and the codes are easy to get.
Toyota! (and Lexus and Scion) / Starter
« Last post by myprizm on January 31, 2011, 07:39:06 PM »
Need some help with starting sytem of my daughter Sentra 96 (about 65k).  Recently she had two incidents that the car didn\'t start. The first time it started after about 15 minutes. The second  time AAA towed her home. As a good Dad I have to do something. I had the same problem with my 1990 Camry. Since it is such erratic behaviour it is difficult to diagnose. Anyway I checked the battery ( was good) and than decided to run extra jumping wire from the selenoid to the battery. By doing so I am eliminating  possible problems with connections, ignition swith, and safety switche and relay. I had the same problem in my 90 Camry and jumping always worked. The problem is that in Sentra acces is terrible and it is not easy to do it. But I did it despite the weather in New England. But now, whenever I jump from the battery the starter is spinning, but is not cranking the engine. Evidently selenoid plunger is not engaging? On other hand, when I start as it is design, which is  from the ignition key, everything works fine? As I understand there is only one signal (one wire) comming from the ignition and it should engage the drive and start motor at the same time.  I was jumping engines this way for almost half of the century and it always worked. Now, I can\'t  find any explanation and it drives me crazy.
Engine is starting fine right know from the ignition key but since it happened before it will happen again and more frequently.
Depends on what accessories you want to get and which model you are trying to match it too.  Sticking with the same generation, the US and JDM models variants are very similar dimensionally.  Some things, like lamp housings (rear tail lamps) are swappable, though the electrical systems are slightly different.  The US car may not like the LEDs of the JDM Altis model.  Also the LHD to RHD distinction between the models, will make some accessories not work.  Grills should fit, bumpers may or may not fit, dependings on the options (fogs).  Most body kits can be made to fit, some modifications will be necessary as not all the bodies will have the same hole/clip locations.
Pages: 1 2 [3] 4 5 ... 10

Site created and maintained by David Zatz. He has written four car books.