Press gas pedal... sounds like exhaust coming out of intake
Engine surges at idle , press on gas surges more and sounds like exhaust is trying to come out of intake....there is no back fire and then just shuts off.... im thinking it could be cat conv...i replace the heads and censors it has been running good and smooth till i ran out of gas. put gas in and about 30 to 40 miles later this started. could be a clogged converter?
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Hi, Likely an exhaust heat shield. When the SUV is cold - after sitting for 4+ hours - crawl under the vehicle and see if any of the shields are loose that cover the exhaust pipes. If they are you can use sheet metal screws screwed into the shield and against the exhaust pipeto 'wedge' the shield so it doesn't move.
Hi Allen, The brake booster is connected to the intake manifold and that is where the low pressure is generated. If the diaphragm or one way valve, or connection pipe is leaking it will give the same effect as a leakage on the intake manifold. The symptoms you report are of a leakage on the intake manifold. To prove one way or another, disconnect the vacuum pipe for the booster and block the connection into the intake manifold. Be careful when testing as you will need to use excessive force on the brake pedal to stop. If the symptoms disappear fit a new booster, if not, pour water along the manifold and observe any bubbles where there may be a leakage. Let me know how you get on. Regards John
it sounds like a lambda sensor issue, the lambda sensor is located on the exhaust manifold, it controls the emisions, it also controls the air/fuel mixture to control the emisions, if it is faulty it could cause the engine to surge like you describe
sounds like the regulator is not doing it's job, but you say starving? Is the engine running lean or rich? Is there black smoke coming out the exhaust? I'm thinking high pressure would normally cause a rich condition.
there is a idle air control valve, its job is to keep ur engine on the needed rpm to keep it running while u stop, it should be on the side in the throttle body, it can be cleaned, but its probabbly best to replace after u get a real diagnose of it. hope this helps
Sounds like it's your IAC (idel air control sensor). The IAC is a computer-controlled air bypass valve located in the throttle body. It helps control idle speeds by allowing air to bypass the throttle plates as to increase the idle speed. If the IAC isn't working properly the car will stall when you are not pressing the gas pedal. It is located on your throttle body and is relatively cheap and a simple change since it is normally held in my two screws. Let me know if you have any other questions. Thanks for an honest ranking and for using FixYa!
When your running out of gas the dirt, grime, and gunk is all you have left except water and that may cause it to surge then slow down irrelevant to the gas pedal pressure.
I've had a similar problem when I ran out of gas
I would try a can of expensive fuel cleaner and a can of dry gas before anything else but that's just me!
sounds like an Idle air control valve or a positive crankcase ventalation valve(or pcv valve). use some intake cleaner in the air intake and take the pcv valve out and shake it it should rattle and move freely. mike