99 Honda Accord RPMs Go Up and Down
Printed From: the12volt.com
Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=25340
Printed Date: May 15, 2024 at 2:26 AM
Topic: 99 Honda Accord RPMs Go Up and Down
Posted By: Leshka44
Subject: 99 Honda Accord RPMs Go Up and Down
Date Posted: January 27, 2004 at 1:08 AM
Hi does any one can help me whit my prblem. when the car is worm the rpms go up and down on the nutrual position.. i know i need to change a sensor behind throttle body but i dont know the name for that censor. can any one help
Replies:
Posted By: geepherder
Date Posted: January 27, 2004 at 8:27 AM
You're looking at the TPS- aka throttle positioning sensor. Also make sure you don't have any vacuum leaks, your ignition system is healthy, and the timing is correct. Check the air filter, then check your other sensors with a multimeter (a repair manual will show you how). I've seen a bad coolant temperature sensor do the same thing.
-------------
My ex once told me I have a perfect face for radio.
Posted By: rbbrink
Date Posted: January 27, 2004 at 10:33 PM
What year and trim grade (EX LX DX) L4 or V6? Some years have a couple of devises tha control idle speed. One is conrtoled by the ECM using an electric motor the other is thermo, and opens and closes a valve w/ engine heated coolant. Try checking the coolant level, if it is very low the coolant temp sensor can't get a good reading of how warm the engine is. If it is low find the leak and repair it first. Also, try to adjust the base idle screw. It is on the upper left side of the of the throttle body on the opening side( looking into it). It is probably covered w/ a film of silicon sealant ( installed by the factory), if it isn't some one has altered it's position. Poeple will adjust up idle to compensate for bad mounts. Slowly turn it clockwise, while the engine is warm, to get desired RPM. Do not over tighten, it should be turned out approx. 2 1/2 to 3 turns from bottom. Giv e that a try and post back
Posted By: Leshka44
Date Posted: January 30, 2004 at 12:59 AM
Well my car was damaged in front and the engine went back and broke one of the two sencors in there but i just want to know the name of it.
Posted By: geepherder
Date Posted: January 30, 2004 at 7:56 PM
The sensor behind the throttle body is the TPS, or throttle positioning sensor. The one on top is usually the MAP sensor. You may need to buy another throttle body. That's what I had to do, since it was actually riveted on, and neither the dealer, nor the junkyard will sell it seperately. Thanks, Honda. What you may do is look up your vehicle on www.hondaautomotiveparts.com, and see if you can identify the sensor. Also take a look at your throttle body to see if indeed it is riveted in place. If it's held in place with tamper-resistant screws, you can break them loose with a chisel and hammer, and replace them with regular phillips head screws. The problem here is you still may not find it sold seperately. Good luck. ------------- My ex once told me I have a perfect face for radio.
Posted By: rbbrink
Date Posted: January 30, 2004 at 11:38 PM
Unfortunately the TPS is not available seperately from the throttlebody, and most junk yards will probably only sell you the whole throttlebody, it's expensive new anyway. Setting the angle to mach the throttle blade correctly with out the right scanner would also be kinnda difficult. Get the used parts and just replace all the gaskets and o-rings
Posted By: itmdtr
Date Posted: January 31, 2004 at 6:02 AM
The name your looking for is a IACV : Idle Air Control Valve. ------------- itmdtr
Posted By: auex
Date Posted: January 31, 2004 at 8:35 AM
Could be a vacuum leak as well.
-------------
Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.
I've been sick lately, sorry I won't be on much.
Posted By: rbbrink
Date Posted: January 31, 2004 at 2:54 PM
If it's an L4 than both idle control parts on the front side of the intake. Not likely to get damaged from a collision. Check the vacumm line that goes to the brake booster, it comes off a pipe on the rear of the manifold, could be a huge leak. If you tell me the year and model and maybe attach a pic of the part it would be a big help.
Posted By: Leshka44
Date Posted: February 02, 2004 at 3:49 PM
This is Honda Accord 99 lx. manual tranny. I think its TPS sensor. I have no a vacume leak... I see the sensor in the back of throttle so probably TPS sensor,
Posted By: rbbrink
Date Posted: February 06, 2004 at 10:46 PM
YES!
Posted By: mikeshonda750
Date Posted: February 07, 2004 at 9:14 PM
Im wondering how you narrowed it down to a TPS yet couldn’t identify what it was to begin with. Truly solving the problem isn’t taking guesses at what it might be; it’s figuring out what is wrong and making the proper repair. Your vehicle is equipped with OBDll system. Any qualified tech with the proper tools can easily read the live engine data and tell you exactly what the problem is... there is a reason why the TPS is riveted to the intake, actually two... it stops people from tampering with them and throwing their emissions out of wack and is riveted because they don’t go bad unless you do something you shouldn’t i.e. ~ Run without an air filter ~ which will also cause idle fluctuations on that vehicle RBBRINK "Poeple will adjust up idle to compensate for bad mounts" Im wondering how adjusting the idle will help compensate for the motor rocking back and forth and causing torque steer? anyways, have a qualified tech take a peek at it instead of playing guessing games -------------
Posted By: Leshka44
Date Posted: February 08, 2004 at 1:32 AM
To mikeshonda750 . This forum made for us that dont know everything and we want it done chipper so i am going to figure out whats the problem is. ANd i dont need no computer to see whats wrong i see it with my eyes its TPS sensor. okey!!!
Posted By: mikeshonda750
Date Posted: February 08, 2004 at 1:42 PM
Well, im wondering now .. how are you visually able to tell its a TPS? I suppose you could be using a ohmmeter and the ohmmeter is visually telling you its bad. How did you check for vacuum leaks? Because you did not see it leaking, there are no leaks? Also, I may be totally incorrect but nowhere in the forums does it say "car repair"... i guess the reason why I am sorta against the whole concept of guessing games is because usually in the end, someone like myself gets to actully solve the problem, and correct the mistakes made by the DIY cheapo is all. I offered my advice, also gave you a few reasons it could not be the TPS, and heres another ~ Fuel Pressure Regulator ~ but also explained the proper steps in determining what the actuall problem is, but you wont have any of that, and thats fine, but no reason to get upset about anything Mike~ -------------
|