High Idle

[NoobKevin]

I have the engine running and even with the ecm jumpered the idle remains high. I think I hear a loud sucking sound from under the intake but I have replaced all of the vaccum lines with steel. There is a tube that is attached to the fire wall that appears to have gone from the breather to the engine. Could that be an issue?

[GTRS Fiero]

There was a tube that went from the front (firewall-side) valve cover, to the air canister.  The recall replaced that with a tube that runs from the front valve cover to the intake tube.  The EGR tube runs from under the intake snorkle to the EGR valve mount block.  That tube likes to leak.

[TopNotch]

Start your car with the engine cold. Before it has time to warm up, grab the EGR tube and try moving it. if you hear a changing hiss as you move it, you need to replace it. The Fiero Store braided EGR tube is a good replacement.

[NoobKevin]

The EGR tube is new if it has broken I will be very disappointed. The sucking sound is loud is that normal. Also this engine gets really hot. I was surprised. Why is the radiator not in the rear and what about rear facing venting for the hood to help shed heat?

[NoobKevin]

The eighties Camaro Z had the Louvered hood. If you have a layer of warm air at the nose and across the front you should also reduce friction and improve aerodynamics.

[GTRS Fiero]

The EGR system has a lot of gaskets.  Maybe one is not in place.

The intake tube is connected at both the air filter housing and the throttle body, right?  If not, it sounds like Darth Vader on constant inhale.  The breather tube should also be connected to the intake tube.

[GTRS Fiero]

You can use a length of hose to probe for the source of yhe sound.  A 3-foot section of garden hose works well.

[NoobKevin]

The intake does sound loud and I love it. I am a noob so I still learning what’s normal. Will be a week or two till I get back to it but my family is impressed that I have dropped the motor and put it back together and it runs.

[GTRS Fiero]

Absolutely, it is great that you can do that.

FYI, Fiero engine bays get very hot, compared to other vehicles.

Make sure you have a filter on the intake when the engine is running.

[TopNotch]

If your engine is running on a lean mixture because of a vacuum leak, it will run hotter than normal. Your exhaust manifolds will glow red at night. And of course, the vacuum leak causes a high idle.

[MikeMac]

Congratulations on what you have accomplished! 

[Raydar]

Congratulations on what you have accomplished!

Second this!

(I still remember the 1st time I pulled an engine from a Fiero and replaced it with another one. My wife was dumbfounded. )

[NoobKevin]

Hi All,

  I did the brake cleaner vacuum check last Thursday and found out that there looks to be an issue at the throttle body. Does the metal tube that inserts into the lower part require an o ring or sealant? I suppose the rubber vacuum boots could be replaced as well.

NoobKev

[GTRS Fiero]

The intake tube is available from TFS.

There is a grommet at the valve cover.  Metal tube into the lower part?

[Fierofool]

Yes, the metal tube at the back side, bottom of the throttle body requires an O-ring inside the throttle body.  The metal tube transitions to a rubber hose attached to the lower intake.