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Exhaust manifold temperature 3.4 swap by go faster
Started on: 10-25-2020 05:06 PM
Replies: 10 (286 views)
Last post by: Patrick on 10-28-2020 03:31 PM
go faster
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Report this Post10-25-2020 05:06 PM Click Here to See the Profile for go fasterClick Here to visit go faster's HomePageSend a Private Message to go fasterEdit/Delete MessageReply w/QuoteDirect Link to This Post
Manifold is glowing. l'm using a temp gun and seeing 600 to700 plus degrees on truck side manifold at cylinders #1 and #3. #5 is showing about 300 ish Found a couple of vacuum leaks and adjusted the timing. Only can see manifold glowing at night. Would like to get exhaust temperature figure so i could check temps during day time. Exhaust manifold restrictions removed and have been ceramic coated. A Spintech muffler was added. Thanks

[This message has been edited by go faster (edited 10-25-2020).]

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Patrick
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Report this Post10-25-2020 06:12 PM Click Here to See the Profile for PatrickSend a Private Message to PatrickEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by go faster:

Manifold is glowing... 600 to700 plus degrees on truck side manifold at cylinders #1 and #3.
#2 is showing about 300 ish



Quite a difference in temperatures from one side to the other. Are the front bank cylinders even firing? Check the injector fuses.

[This message has been edited by Patrick (edited 10-25-2020).]

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Report this Post10-25-2020 06:51 PM Click Here to See the Profile for go fasterClick Here to visit go faster's HomePageSend a Private Message to go fasterEdit/Delete MessageReply w/QuoteDirect Link to This Post
The front side is glowing at #6 from what i can see. Will check to see if injectors are working.
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Report this Post10-25-2020 08:01 PM Click Here to See the Profile for PatrickSend a Private Message to PatrickEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by go faster:

Found a couple of vacuum leaks and adjusted the timing.


Perhaps double-check that the harmonic balancer hasn't slipped. If it has, then the ignition timing will be off. Make sure that actual TDC of #1 is 0° on the timing scale.
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Report this Post10-25-2020 08:15 PM Click Here to See the Profile for go fasterClick Here to visit go faster's HomePageSend a Private Message to go fasterEdit/Delete MessageReply w/QuoteDirect Link to This Post
Harmonic balancer is new. Will check timing thinking the timing is off and the motor is firing with the exhaust valve open.
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Report this Post10-25-2020 10:24 PM Click Here to See the Profile for go fasterClick Here to visit go faster's HomePageSend a Private Message to go fasterEdit/Delete MessageReply w/QuoteDirect Link to This Post

go faster

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Found this under exhaust gas temperature.
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sourmash
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Report this Post10-26-2020 08:28 AM Click Here to See the Profile for sourmashSend a Private Message to sourmashEdit/Delete MessageReply w/QuoteDirect Link to This Post
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Report this Post10-26-2020 05:30 PM Click Here to See the Profile for pmbrunelleSend a Private Message to pmbrunelleEdit/Delete MessageReply w/QuoteDirect Link to This Post
At night, both manifolds (well, what I can see of the front one) on my Fiero get a visible dark cherry glow after sustained highway driving. It runs like a top. After a few minutes of city driving or idling the manifolds stop glowing.

It would be bizarre if both your banks aren't working the same.

[This message has been edited by pmbrunelle (edited 10-26-2020).]

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Raydar
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Report this Post10-26-2020 08:15 PM Click Here to See the Profile for RaydarSend a Private Message to RaydarEdit/Delete MessageReply w/QuoteDirect Link to This Post
Ed Parks, I believe, made the statement that, in a dark garage, it's quite normal to see a slight glow from the Fiero manifolds.

When I was breaking in my cam (fast idle) I lit those suckers up.

If it runs decently, I wouldn't sweat a little bit of a glow, as long as they're not bright orange or white. With that said, you would think they would be at sort-of similar temperatures, if everything is working properly.
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Report this Post10-28-2020 02:17 PM Click Here to See the Profile for go fasterClick Here to visit go faster's HomePageSend a Private Message to go fasterEdit/Delete MessageReply w/QuoteDirect Link to This Post
Looking at the field service manual It's stated to check for blockage at the injector. I found that my primary fuel line after the fuel filter was cracked and some type of putty was used to stop the leak. Maybe that is the cause of #5 cylinder being long in temperature.
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Report this Post10-28-2020 03:31 PM Click Here to See the Profile for PatrickSend a Private Message to PatrickEdit/Delete MessageReply w/QuoteDirect Link to This Post

You can tell a lot by inspecting the spark plugs. If one injector is plugged and/or leaking, the associated spark plug will certainly look different than the rest.
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