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Author Topic: The new life of the formula fastback  (Read 38164 times)

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GTRS Fiero

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Re: The new life of the formula fastback
« Reply #450 on: January 15, 2020, 10:11:05 pm »
Oops.  I thought his last name was Thelin.

Was the cause of the stumble ever determined?  Ground?

Fierofool

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Re: The new life of the formula fastback
« Reply #451 on: January 15, 2020, 11:00:56 pm »
My 87 began having the same issue.  I decided to replace the ICM as a test.  Found corrosion on the pickup coil terminal and on the ICM metal plate even tho it had plenty of CLEAR heatsink grease.  Replaced the module and applied white heatsink grease.  Problem gone.
There are three kinds of men:

1.    The ones that learn by reading.
2.    The few who learn by observation.
3.    The rest of them have to pee on the electric fence and find out for themselves.    Will Rogers

NoMad

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Re: The new life of the formula fastback
« Reply #452 on: January 16, 2020, 12:36:28 pm »
I have already done the ICM with no fix. I am still pretty certain it is the injector on cylinder 2 and now low compression from fuel striping the lube from the cylinder wall and causing ring wear or scoring. Won't know till the motor is out though. Not worth anymore effort or money when I have a brand new motor almost ready to be installed.

Not sure if I will rebuild this one when I pull it or not.

Raydar

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Re: The new life of the formula fastback
« Reply #453 on: January 16, 2020, 05:19:53 pm »
...
Not sure if I will rebuild this one when I pull it or not.

If it really is a 3.1, bored out to 3.4 (as I was told by Dave) then there probably isn't enough cylinder wall thickness for an overbore. You might get away with a "hone and re-ring".
...

GTRS Fiero

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Re: The new life of the formula fastback
« Reply #454 on: January 16, 2020, 05:51:23 pm »
Until it's apart, we don't know what the issue is.  It seems I recall compression being an issue.  I'm curious how the pistons look.  When Scott drove it, there seemed to be plenty of power.

Fierofool

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Re: The new life of the formula fastback
« Reply #455 on: January 16, 2020, 07:01:07 pm »
Dave told me that it was from an early 90's FWD van, selected because of the thicker cylinder walls.  Then he bored it to the max at .060.  The 3.4 had not yet been introduced when he built the car. 
There are three kinds of men:

1.    The ones that learn by reading.
2.    The few who learn by observation.
3.    The rest of them have to pee on the electric fence and find out for themselves.    Will Rogers

GTRS Fiero

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Re: The new life of the formula fastback
« Reply #456 on: January 23, 2020, 08:56:58 pm »
If bored to .060, what is the displacement?

NoMad

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Re: The new life of the formula fastback
« Reply #457 on: January 24, 2020, 12:54:44 am »
I believe it is 3.233 or there abouts.

NoMad

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Re: The new life of the formula fastback
« Reply #458 on: March 18, 2020, 11:55:29 pm »
Well I finally managed to get another replacement ICM in my hands to see if my issue was just a bad ICM replacement.

Went for a test drive and thought I might have it sorted....then 30 minutes into testing the surge came back and worse than ever. Wasn't the ICM.

At this point I am officially done trying to drive the car until the motor swap is done. There is something major wrong with either injectors or ignition and it is bad enough that it nearly got Marilyn and I killed on 285. So ya, no more money or time into this engine till I have the new running gear in.

So with upcoming body changes and a motor and transmission swap to soon be completed, this might be the end of the formula fastback for good. The new iteration will deserve a clean slate name going forward.

GTRS Fiero

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Re: The new life of the formula fastback
« Reply #459 on: March 19, 2020, 12:00:18 am »
Good to get an update, but sorry to read about the scare on 285.

mweldon

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Re: The new life of the formula fastback
« Reply #460 on: March 19, 2020, 12:23:25 pm »
FF 2.0

 :o

GTRS Fiero

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Re: The new life of the formula fastback
« Reply #461 on: March 19, 2020, 06:37:30 pm »
mweldon, are you going on RFTH, this year?

mweldon

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Re: The new life of the formula fastback
« Reply #462 on: March 20, 2020, 11:36:39 am »
mweldon, are you going on RFTH, this year?

In my fiero, who knows as I may actually finish the LF3/LF4 swap with all the quarantining going  on....

Otherwise if I go I'll be driving my Mazda.

The better question or rather statement is.... I hope GaFiero.org can have the RFTH this year with all that's going on....

BTW, serious kudos to NoMad for coming over and helping me out with the last engine mount for my swap... I was kinda worn out from all the cutting, grinding, shaping, test fitting, grinding, testing, grinding, welding, grinding from the first 3 mounts... His enthusiasm was seriously needed and I let him take over the welding and grinding while I did the drilling, tapping and spacing for the last mount.  Well engineered engine mounts are a @#$%!

Fierofool

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Re: The new life of the formula fastback
« Reply #463 on: March 20, 2020, 12:39:28 pm »
Mark, regarding RFTH this year, we canceled the scouting and documentation trip for tomorrow.  I have the route laid out and route sheets and really, only the restaurants and hotels need be contacted for reservations to make it possible to hold the event.

Speaking solely for myself since I've had no input from any of the other board members, I don't know if the event will take place this year.  It's too early to make that decision.  Government speculation is that this virus could still be a major problem as far out as 18 months.  That could put us as far out as the end of 2021. 
There are three kinds of men:

1.    The ones that learn by reading.
2.    The few who learn by observation.
3.    The rest of them have to pee on the electric fence and find out for themselves.    Will Rogers

NoMad

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Re: The new life of the formula fastback
« Reply #464 on: March 25, 2020, 07:01:26 am »
Well I tried to start the fiero on Saturday.... won't start now after the fun on 285. So ya, down till LQ1 install.