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Old Feb 13, 2026 | 03:17 PM
  #1  
DiabloWS6's Avatar
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From: San Fernando valley-Lancaster,CA
Car: '86 TRANS-AM WS6
Engine: 1989 355 TPI L98
Transmission: TH700R-4
Axle/Gears: BorgWarner 9 bolt/ 3.27
Car wont start

So I have done what I can checked and re checked things and replaced possible components due to either age or possible issue. Nothing has worked still in the same spot. Now im reaching out to anyone who is close to Lancaster, CA ill pay you to help me get this issue sorted out.
car is a 1986 trans am
mods super ram, zz4 cam proper valve srpings for the zz4 cam, 113 corvette cylinder heads, engine is out of a 1989 350 bored out .030, engine harness from 198o adapted to work harness was made to work by dyno don.
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Old Feb 13, 2026 | 08:07 PM
  #2  
countryracer69's Avatar
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Re: Car wont start

Find out whats missing. Fuel, air, compression, or spark.
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Old Feb 16, 2026 | 10:15 AM
  #3  
tmavent's Avatar
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Joined: Sep 2018
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From: Orange County
Car: 1990 Pontiac Firebird Formula
Engine: 305 TPI
Transmission: 5 Speed Manual
Re: Car wont start

Absolute basics. Save yourself a LOT of billable labor time by doing compression tests and checking for spark at each cylinder.

There were updates and requests on our regional board for shops that are willing to work on our old GM monstrosities. At least with EFI, the young shade-tree mechanics at the local high school or community college may take some interest in exchange for snacks and bbq.

Seeing that you've modified all parts of the 4 cycle of suck squeeze bang blow, there's a LOT that could've gone wrong here.
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Old Feb 17, 2026 | 08:06 AM
  #4  
ironwill's Avatar
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Car: 1986 IROC Z
Engine: 5.0 TPI
Transmission: 700R4
Axle/Gears: 3.23 Posi
Re: Car wont start

Originally Posted by DiabloWS6
So I have done what I can checked and re checked things and replaced possible components due to either age or possible issue. Nothing has worked still in the same spot. Now im reaching out to anyone who is close to Lancaster, CA ill pay you to help me get this issue sorted out.
car is a 1986 trans am
mods super ram, zz4 cam proper valve srpings for the zz4 cam, 113 corvette cylinder heads, engine is out of a 1989 350 bored out .030, engine harness from 198o adapted to work harness was made to work by dyno don.
No info to go on; need some history of this engine. It is is obv not stock; have you ever heard it run? In your car?

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Old Feb 17, 2026 | 03:17 PM
  #5  
DiabloWS6's Avatar
Thread Starter
Senior Member
15 Year Member
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iTrader: (8)
 
Joined: Sep 2008
Posts: 700
Likes: 1
From: San Fernando valley-Lancaster,CA
Car: '86 TRANS-AM WS6
Engine: 1989 355 TPI L98
Transmission: TH700R-4
Axle/Gears: BorgWarner 9 bolt/ 3.27
Re: Car wont start

Originally Posted by ironwill
No info to go on; need some history of this engine. It is is obv not stock; have you ever heard it run? In your car?
correct not stock but simple bolt on's. Yes I have a video of me setting up the position of my muffler to weld it myself teach myself how to practice welding. And the car is running not perfectly but it was the last time it ran on key on with out me being on the engine side manually moving stuff to get it to run.
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Old Feb 18, 2026 | 10:02 AM
  #6  
ironwill's Avatar
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Car: 1986 IROC Z
Engine: 5.0 TPI
Transmission: 700R4
Axle/Gears: 3.23 Posi
Re: Car wont start

Other than checking all the basics---fuel, air, compression, and spark all on time---the only other guidance anyone can give you for a non-stock setup is to look at everything, especially your modified 1980 wiring harness.

Good luck.


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