Car reving high in idle the goes to nothing

Good morning,

I would suspect a vacuum leak that is causing the idle to not act correctly.

https://www.2carpros.com/articles/engine-idles-too-high

Inspect all the hoses for cracks or breaks.

Also, there is an idle air control motor that does regulate the idle speed. Check the connection as well.

https://www.2carpros.com/articles/how-to-replace-an-idle-speed-control-motor-iac

Are there any codes set?

Roy

I changed the valve and no leaks. My battery is now dead from checking it and checking the idling. It still revs up and then back down then up then goes until now battery dead.

Charge the battery back up.

Was any work done prior to this issue?

Roy

Could this be a alternator issue? Battery only a year old and was told it is bad..

It could be for the battery going dead, yes, but not the high idle issue.

https://www.2carpros.com/articles/car-battery-load-test

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Roy

Before the car did the high idle I added a purge valve added a line to the intake. I’ve now put everything back as is but still high idles and then goes all the way down on RPM's and the battery voltages is erratic and goes in red.

What voltages? What are the exact voltages?

You may have a bad idle air control valve in the throttle body.

Roy

Mine was on top and I replaced today brand new and same issue. I do have a code for the TPS now would that cause this issue?

If is not adjusted correctly yes.

Roy

If I buy a new one does it have to be adjusted?

Generally, no.

It just bolts on to the throttle body and there are no provisions for adjusting.

Roy

Procedure

REMOVE OR DISCONNECT
1. The Throttle Position (TP) sensor electrical connector.
2. The two TP sensor attaching screws.

INSTALL OR CONNECT
1. With the throttle valve in the normal closed idle position, install the TP sensor on the throttle body assembly, making sure the TP sensor pickup lever is located above the tang on the throttle actuator lever.
2. The two TP sensor attaching screws, using a thread-locking compound on the screws. Loctite 262, GM Part No. 1052624, or equivalent should be used.
3. The TP sensor electrical connector.

It ended up being the MAF sensor. The car rides smooth once driven but in the beginning it starts to shake for a little until driven a little. I can hear a vacuum leak just can’t find. Also the car revs when put into drive and reverse. Could it be from the leak? Thanks

No. The leak has no effect on the roving .

Roy

I have to play with the battery terminals in order to get it to run. I have to put the car on "on" and rotate the positive cable around all over the place for it to even get a connection. Is it bad cables or the terminal itself I can’t see the wires because it’s in a housing. Sometimes the car will start and others makes the battery tick noise if it’s not at right angle I assume.

You either need to replace the entire cable or clean the cables real good.

https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked

Roy

1. Cable cleaning worked and I can start the car right away it now just sputters In beginning until I drive for about thirty seconds not sure if it will shut off if I didn’t move it.
2. There must be a leak but when I press the gas pedal it pretty much goes away and I hear nothing but the moment I let go it’s back. where could this possible be?
Thanks for all the help.

Goes away? Please explain.

Roy

When I press the gas pedal the sound goes away or it lessens drastically, but the moment my foot comes off it makes a scream like sound not to loud but noticeable or vacuum sound.

Got it.

You have a vacuum leak somewhere. You need to find where that squealing is coming from.

Spray some starting fluid around some areas it sounds like where it is coming from. It will stop when you get to the area.

Roy

I sprayed the EGR and the engine sounds quieter and smoother. I almost sprayed too much and it was slowing down the engine. is the EGR sucking in air?

Yes, as it may be partially open when it should be closed.

Remove it and inspect it and if you can, send me a picture for me to view.

Roy

The area of the EGR valve it revs up.

There is no gasket under the EGR.

The black indicates it is leaking. I would replace it and the gasket.

Roy

There should be a gasket. That could be the issue.

Roy

Thanks for the help. How many O2 sensors does a 97 camaro 3.8 & what does the purge valve get connected into the electrical and the intake but what’s the last one?

Okay, I attached a diagram of the sensors and the location.

As far as the purge valve, there is an electrical connection for it. Did you disconnect it and lose the connector?

Last one? Please explain.

Roy

Great on the diagram. The car was missing the purge valve I connected the electrical and to the intake. Does another hose get connected?

There should be a hose that runs back to the fuel tank. It is a vapor line not a fuel line.

I attached a diagram for you to view.

Roy

Where is the EVAP canister located?

Under the left rear of the car. I attached a picture for you.

Roy

REMOVE OR DISCONNECT
1. Negative battery cable.
2. Raise vehicle.
3. Driver side rear wheel housing liner.
4. Hoses from canister. Mark hoses to install on new canister.
5. Release latch on canister bracket.
6. Canister from canister bracket.
7. Canister from vehicle.

INSTALL OR CONNECT
1. Canister to vehicle.
2. Canister to canister bracket, make sure latch engages.
3. Hoses to canister. Make sure connections are correct.
4. Driver side rear wheel housing liner.
5. Lower vehicle.
6. Negative battery cable.

I have code P1441 and P0507 I assume the 0507 is there because of the 1441? Can the car run without a vapor canister?

The 507 is for the Idle Air control.

Make sure the bore is clean of carbon.

The 1441 is the canister.

Roy

Okay great, the vacuum switch that connects the vapor line has a electrical connector but also has a wired metal circle along with it where does that go?

Okay great, the vacuum switch that connects the vapor line has a electrical connector but also has a wired metal circle along with it where does that go? 2. My wipers off position is straight up. They work perfectly one day I was playing with battery a lot and they finally went down then when I used them again they went right back up

Please attach a picture of the canister.

The wiper motor park position circuit is the issue. Replace the wiper motor.

Where is the ABS wheel sensor on the 1997 Camaro v6 RS? do I have to take off tire?

Yes, the sensors are at each wheel and the tires need to be removed.

Roy

My security light is on and always has been. Car runs though.

Will changing the wheel sensors turn off my ABS inop light? Also code P1441 will it go out if I get the correct vacuum switch with the electrical connections(currently I have one without it)?