Could someone give me 3 or 4 different things that could be causing this, or maybe pin point the problem..it is really getting nerve racking. I can sit at a stop light and it just wants to take off. Also when I'm going about 30 mph or so I can feel it tugging then slowing, tugging then slowing. It's tacking around 2 and 3/4 when it revs up. Is something stuck or just wore out? Thanks for any kind of help !!
2006-10-01 23:52:22 · 4 answers · asked by kornsap 2 in Cars & Transportation ➔ Maintenance & Repairs
idles up and down like surging, your Idle up air control valve is not getting the proper coolant flow across it and the pcm wants to lower the idle speed after a timed warm up but can not.
The idle up solenoid is a wax type valve @ the back side of the intake manifold. there are small coolant hoses that go to the units. Warm you car up and feel these smaller coolant hoses on your engine by the intake manifold. there are about 4 of them. be careful not to burn your hands. At any rate you will probably find some that are hot like the same temp as your radiator hoses and some that are not. They all have to have the same temp as your radiator. Also This is assuming that your radiator is coming up to proper temp. If it isn't, you need to fix that first. I.E stuck open thermostat or no thermostat.
If you find some that are cooler then the others you need to fix/open the coolant flow restriction.
Where I usually find the restricted coolant flow is @ the steel pipe that attaches 2 of the hoses together right near the black intake boot for your airbox near the throttle body. Carefully touch this steel tube, It MAY BE HOT.
If its not hot check both hoses go to and from there, they need to be hot, clear the tube with compressed air or what sometimes has to be done is bypassed with a longer 1/4 inch hose and bypasss the tube all together.
If all your idle up coolant hoses are warm and you know that there is no Vacuum leaks causing the idle to flare like you said it is, check base idle, check for a bad idle wax valve, what does happen and also check for an internal vacuum leak @ the Charcoal canister mounted on the firewall by your fuel filter.
Hope that helps you.
I have repaired many a Honda for the same complaint and all caused by coolant flow restriction go to the idle up wax valve assembly and idle control solenoid. Your under hood emissions sticker will show you the exact location
ALSO a broken PCV valve will cause the same thing. Some Honda's use plastic pcv valves and the valve inside the pcv assembly breaks away causing a internal engine vacuum leak. Find the pcv, usually near the center of the intake on your car, pinch the hose with needle nose pliers and see if your idle speed drops dramatically. if so pull the pcv out and see if you can see right thru it. if you can, It's broken and in need of replacement.
2006-10-02 02:37:56 · answer #1 · answered by Magikmann 4 · 1⤊ 1⤋
This Site Might Help You.
RE:
My '93 Honda Accord revs up, drops down, revs up then down, even after it warms up. what could be the problem?
Could someone give me 3 or 4 different things that could be causing this, or maybe pin point the problem..it is really getting nerve racking. I can sit at a stop light and it just wants to take off. Also when I'm going about 30 mph or so I can feel it tugging then slowing, tugging then slowing....
2015-08-20 08:43:24 · answer #2 · answered by Cornelle 1 · 0⤊ 0⤋
Hello World
2016-03-14 07:11:18 · answer #3 · answered by ? 4 · 0⤊ 0⤋
try this disconnect battery wait 5 five minutes reconnect and start-up let idle for about 3-5 minutes then drive what it does is reset computer this may work for you it has me ....goodluck! if thats not it replace TPI sensor or MAP sensor....
2006-10-02 00:02:41 · answer #4 · answered by rotor29334 2 · 0⤊ 3⤋
air leak
2006-10-02 00:42:35 · answer #5 · answered by Anonymous · 1⤊ 0⤋