How can I find a vacuum leak? I hear hissing from driver side. I used 2 cans of starter spray and on throttle cleaner. No change in rpm.
I'm on the of my Latin. If I pull the throttle short and raise the rpm I hear a loud air soak. But I can't locate it. Can be the egr, lower intake upper intake or fuel interceptor. I begin to hate the car.
Ok just so I know what the dealer may do to fix it....I have a weird hissing sound coming from the driver side like a vacuum hose is off or something...but when I apply the brakes it goes away...I let go and it comes back...when I shut the car off as well it stays hissing until I hit the brakes again or it just quiets down... What this may be?
View 1 RepliesMy ford's 4x4 will work if I manually lock in the hubs. If i use the auto option it will not engage. I can feel the rear end diff lock when I put it in 4-low so I know the switch is working. I think it is a vacuum actuated system. How to find the leak or diagnose the problem?
View 7 RepliesMy truck is running fine but it sounds like there is an air leak on the drivers side of the truck. When it first happened I was passing a car and it sounded like a vacuum hose come loose. It made a loud hissing sound. Now I have come to the conclusion it must be associated with the turbo. I don't hear the hiss unless I get into the truck and the turbo starts making boost. The more boost is made the louder the hissing sound is.
View 4 RepliesI have a vacuum leak on the driver side seal on the changeover rod in the intake manifold. It was replaced recently at the dealer and now has another hole in it. I was told this is caused by oil in the lines and my pcv valve is bad.
View 1 RepliesI have just replaced my vacuum lines after find a hole in the hose going the the vacuum reservoir. I have also recently replace the pcv hose. This seems to have created increased vacuum pressure and I am now hearing a hissing coming from the back center part of the engine.
Pulling codes P1411, P1423, P1138
Regarding photo - The area the hissing appears to come from is located in the rectangle area, more or less.
2.8 atq B5 Variant
I noticed tonight my 4.6 V-8 Aviator is acting a bit sluggish, not bad, but still noticeable. I'm pretty sure I heard a hissing noise, almost like a vacuum leak. Would that vacuum leak caused by the pcv valve cause sub-par acceleration? I'm going to check the pcv valve in the morning. is there more than one pcv valve.hose on these 4.6 V-8's? I'm asking because I was reading about the pcv hose/valve in these 4.6 V-8's, some people on this forum had vacuum leaks caused by the pcv valve failing, being that it connects to the intake manifold.
View 14 RepliesI was using the method of spraying starter fluid around the intake and found a pretty significant vacuum leak around the throttle shaft on the drivers side. The carb is a 2 barrel holley. What are some different ways to seal a throttle shaft vacuum leak? Could I take it apart and seal it with a plastic O-ring for now?
View 2 RepliesI did the search for this and there seems to be a link that details how to remove the driver's side headlight bulb housing which is different than the passenger side. I got that side replaced with no problem but the driver's side seems to be a pain to remove.
View 4 RepliesHave a hissing noise coming from underneath dash on driver's side. I can't see any fluid, steam or smoke coming from anywhere. Hissing continues even after engine turned off.
View 6 RepliesDriver's side strut makes noise, been told by a mechanic it is nothing to worry about just the rubber mount on the strut. Makes noise when accelerating from a dead stop or sometimes turning. It is not a metallic sound. Can i get buy with changing the rubber mount on top of the strut or is it down in the strut itself so the strut needs to be replaced? 1997 Chevrolet Lumina car 4 door....
View 2 Replies1998 base model, 3.1, about 232,000 miles on it.
purchased at about 45,000 miles and always had a slight "hissing " noise when I apply the brake.
Yesterday the car was parked on a very slight incline. Emergency brake was applied. a/c was on . I returned about 5 minutes later and heard a "hissing" type of sound. It seemed to be coming from under the dash on drivers side.
As I put my foot on the brake and shifted into reverse the noise stopped. Today at various times I have the same noise.
I've owned at least 40 cars in the last 50 years and this car has the very worse brakes of all . I've tried all types of pads, etc. The rear cylinders rebuilt about 150,000 miles ago. Master cylinder is original.
OK... I know next to nothing about cars. I have a '99 Chevy Lumina I just bought in February. It has been one problem after another. The water pump has been changed and I just got my car back on Monday because there was a leak on the timing chain cover. Now, the car is smoking on the passenger side. Its not a light smoke, but its not heavy yet. I noticed it on the way to work this morning. I opened the hood, it is coming from the left side (looking at it, so the passenger side) of the engine maybe kinda underneath it. I dunno what to do, but I'm ready to push that thing into a lake.
View 1 RepliesI have 30k on my 97 Chevy Lumina. there is so much vacuum in the gas tank that it crushed the tank. I have replaced the tank but don't know what the problem is. Have taken it to three different shops and got three different opinions. One shop replaced the purge solenoid, no luck. Another said there is no fuel tank pressure data and want to drop the tank and check the sensor. the error code they read is p0440. The other replaced the evap canister. Am driving without the gas cap to protect new tank.I don't want to pay for another unnecessary repair and am sure I can repair it myself but want to be cartain I have it right. Also I didn't realize there was a pressure sensor in the tank. They also said I could have a restricted vent valve or canister.
View 4 Replies1995 Chevy Lumina 3.1L Sedan with ~182K mi
Over the past 6 months, I have noticed fuel odor just about any time I turn off the vehicle, and I am also experiencing progressively higher levels of fuel tank pressure each time I remove the fuel cap. The fuel tank pressure seems to be greater the lower the level of fuel in the tank whenever I remove the cap. 6 months ago (~Sept) it was only a slight "hissing" periodically when removing the cap to fuel up, but now it occurs at every fill up and seems to have enough pressure to push the cap entirely off had I not been careful to slowly loosen the cap to relieve the pressure.
The entire fuel pump and sending unit assembly in addition to the tank and filter were all replaced about 4 years ago in May 2010 or about 28K mi ago. The issue has just come up progressively over the last 6 months.
Today, I inspected the evap. emission components and lines from the tank to the canister to the purge solenoid mounted on the rear of the engine. All lines are connected and seem to be in operable condition. The line from the canister to the purge valve mounted on the engine is completely free with no obstructions. I blew out the line with compressed air and absolutely no exiting particulates were observed. The lines on the bottom of the canister did not show any signs of wet fuel and there were no carbon particles present in the lines from what I could tell from disconnecting and inspecting. The vapor line from the tank to the carbon canister is not kinked or pinched in any manner.
I believe there is a fuel vapor check valve that resides inside the tank connected to the fuel pump assembly/sending unit. This was all replaced as a single unit as mentioned above. I am thinking this check valve may not be functioning properly and not allowing the vapor to escape into the carbon canister. I tried to apply slight pressure and vacuum on the vapor line connected to the check valve on the tank but no air was able to move in or out even with the gas cap off. However, I do have a full tank of gas right now, so I imagine the check valve will be closed.
The check engine light is not on but since this is an OBDI vehicle I am not sure there are any evap. emission codes anyway.
How can I test the gas tank vapor check valve? How can I test the vapor purge solenoid located on the rear of the engine? What malfunctioning component could be causing the excessive fuel tank pressure.
A friend of mine today told me a good way to find vaccum leaks with starter fluid. Lightly spray it over the vacuum lines on an idling engine until the idle speeds up. Where you were spraying when it sped up is where the leak is. Be careful as it is very flammable. [IMG] [URL] .....
View 2 RepliesQuestion. I have never used propane to find vacuum leaks. I always use starter fluid. I understand propane is better but how nuch do you use? Low volume, or a lot of propane. I just don't want to kill myself.
View 14 RepliesI noticed that one of my vacuum lines was bad on the driver's side. I've done a lot of reading on the 4WD systems and frankly I'm confused now. My understanding is that when in 2WD the solenoid is open pulling a vacuum on the actuators (IWE) which keeps them disengaged. When you switch to 4WD the shift motor on the transfer case sends power to the front wheels and the solenoid turns off the vacuum which engages the actuators sending power to the wheels. Therefore if there is a vacuum leak the actuators won't disengage properly.
Through my trouble shooting I've determined that I think the solenoid is working properly because I'm getting a vacuum when in 2WD and no vacuum in 4WD. I believe that both actuators are engaged and working properly when in 4WD. However, I must not be getting a vacuum to the driver's side actuator (hub) because the line is totally busted up and can't possibly hold a vacuum. However the passenger side line looks good to me. Does this mean that I've been driving around in "3WD"??? I don't seem to have any problems when in 2WD turning (no tire skip or hop).
I've noticed my oil level dropping very slowly, but more rapidly than normal. It seems to have picked up a bit recently and when I was at a friend's house and parked in his garage, in a half hour I had two nickle-sized oil spots under my car. They are more towards the driver side. The spots had some space in between them, which leads me to believe the oil is coming from up above and it is hitting something on the way down to send it in separate directions.
***In a month's time (2k miles) I was at the min indicator on the dip stick***
i have a strange leak under my driverside, im not sure if its an oil leak or what.
View 6 Repliesat the old shop i had access to a big nitrogen bottle that i used to pressurize AC systems to find leaks with soap water. since that shop closed i no longer have access to the nitrogen. the girl down the street has a nissan altima that was in a front end wreck last fall, and after the repair the ac is kaput. I think the condenser has a crack in it, but the only way i have now to test is to pump in refrigerant until i find the leak. since i don't like venting to atmosphere, i would really like to find a better way to find leaks. the leak on this is pretty good. it takes less than 15 seconds to go from 25 inches vacuum to zero when the valve is closed.
View 1 Replies