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Lt1 Fiero Owners. by str8maxn
Started on: 08-16-2021 04:32 PM
Replies: 49 (712 views)
Last post by: str8maxn on 10-12-2021 03:01 AM
cyrus88
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Report this Post09-01-2021 05:30 PM Click Here to See the Profile for cyrus88Send a Private Message to cyrus88Edit/Delete MessageReply w/QuoteDirect Link to This Post
Cyls 1 and 2 don't look good. Looks like carbon fouling. Maybe you got some leaky injectors and are running rich on those cylinders, but I don't know.

I think the Bosch double Iridium are supposed to be preset at a gap of 1.3mm, which is about .051".
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str8maxn
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Report this Post09-01-2021 06:26 PM Click Here to See the Profile for str8maxnSend a Private Message to str8maxnEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by cyrus88:

Cyls 1 and 2 don't look good. Looks like carbon fouling. Maybe you got some leaky injectors and are running rich on those cylinders, but I don't know.

I think the Bosch double Iridium are supposed to be preset at a gap of 1.3mm, which is about .051".



I was concerned about the gap too but this is straight from the bosch web site. I am running the Double Iridium plugs.


While the intake was off, I took the time to clean each injector out ..
Per the last owner, there was a time when a hose inside the gas tank caused the fiero to stop running . It apparently got all gummed up .
I did manage to get a good jet stream from each injector after the cleaning.

[This message has been edited by str8maxn (edited 09-01-2021).]

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str8maxn
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Report this Post09-02-2021 10:33 AM Click Here to See the Profile for str8maxnSend a Private Message to str8maxnEdit/Delete MessageReply w/QuoteDirect Link to This Post
Is this what the routing for a remote water pump should look like?


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cyrus88
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Report this Post09-02-2021 07:42 PM Click Here to See the Profile for cyrus88Send a Private Message to cyrus88Edit/Delete MessageReply w/QuoteDirect Link to This Post
In short, No.

I'll post a quick sketch shortly.
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cyrus88
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Report this Post09-02-2021 07:56 PM Click Here to See the Profile for cyrus88Send a Private Message to cyrus88Edit/Delete MessageReply w/QuoteDirect Link to This Post
Here's a quick edit of your sketch: (This is with the CSR water pump)

[This message has been edited by cyrus88 (edited 09-02-2021).]

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La fiera
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Report this Post09-02-2021 09:09 PM Click Here to See the Profile for La fieraSend a Private Message to La fieraEdit/Delete MessageReply w/QuoteDirect Link to This Post
If you got the controller from Germany you will not need a thermostat. The controller will pulse the pump to slow the water in the radiator so the fan can take the heat away.
I set my temperature at 150F and it stays there regardless how hard I beat on the engine.
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str8maxn
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Report this Post09-20-2021 10:47 AM Click Here to See the Profile for str8maxnSend a Private Message to str8maxnEdit/Delete MessageReply w/QuoteDirect Link to This Post
Hello All,

Just wanted to post an update of the work done.

Replaced Intake Gaskets
New spark plugs
New spark plug wires
Oil change
Gutted the OEM water pump to run the electric water pump (this setup may change)
Clean out the TB
Clean out the Fuel Injectors
New Belt
New exhaust tips

Pending:
Sent the MSD Optispark out to MSD to have it rebuilt. I am hoping this will fix my misfire.
Flush cooling system \ install remote water pump
Install new 3 row champion radiator (On back order)


Please let me know if I should replace anything else.

[This message has been edited by str8maxn (edited 09-20-2021).]

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Archie
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Report this Post09-21-2021 02:28 AM Click Here to See the Profile for ArchieClick Here to visit Archie's HomePageClick Here to Email ArchieSend a Private Message to ArchieEdit/Delete MessageReply w/QuoteDirect Link to This Post
I'm late to this thread.

Looks like you guys have it under control.

However remember that unlike a normal SBC the LT1 of your vintage has a reverse flow cooling system.

Normal SBC engine the water cools the block & then the heads.

that LT1 cools the heads first.

Archie
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str8maxn
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Report this Post09-21-2021 10:07 AM Click Here to See the Profile for str8maxnSend a Private Message to str8maxnEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Archie:

I'm late to this thread.

Looks like you guys have it under control.

However remember that unlike a normal SBC the LT1 of your vintage has a reverse flow cooling system.

Normal SBC engine the water cools the block & then the heads.

that LT1 cools the heads first.

Archie


Hello Archie, Welcome to the party... Look forward to any input you may have. Thank you for the reply.


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str8maxn
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Report this Post10-12-2021 03:01 AM Click Here to See the Profile for str8maxnSend a Private Message to str8maxnEdit/Delete MessageReply w/QuoteDirect Link to This Post
Hello everyone,

I sent out my OptiSpark to MSD to get rebuilt and it should be here any day now... Is there any instructions for installing the OptiSpark? Do I need to find DTC or does the OptiSpark just line up via the notches?

If I need to find DTC... How would I go about that?

Thank you ...

[This message has been edited by str8maxn (edited 10-12-2021).]

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