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Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

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Old 07-10-2008, 11:29 PM   #1
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Location: Abilene Texas
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Car: '87 IROC-Z
Engine: 5.0 TPI
Transmission: 700r4

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Slow crank
I'm having a problem with this IROC I just baught. It cranks way to slow. I've tried two different batteries, a new mini starter (the old one was fried) and I even jumped it to another vehicle and it still cranks to slow. The car hasn't started since I purchased it and I'm pretty sure at this point that it is ignition related but I need it to crank (faster) before it will ever fire.

Oh and it's an auto, 305, TPI, '87 IROC.
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Old 07-11-2008, 12:44 AM   #2
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Location: Rio Oro de Santa Ana, San Jose, Costa Rica
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Car: 1984 Z28 Hardtop / 1988 IROC T-top
Engine: 383 Carb / 305 TPI
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Axle/Gears: 3.54 Dana 44 / 3.08 10 bolt

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Re: Slow crank
Are all the battery and starter connections in good shape?

Does it turn at a consistenly slow pace, or does it turn and then sort of stop and hesitate for a second before starting to turn again?
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Old 07-11-2008, 11:20 AM   #3
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Car: '87 IROC-Z
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Re: Slow crank
It has new battery terminal and a new positive cable. All the other wiring is good. It is a cosistant crank. Just for kicks though, what would cause it to crank inconsistantly?
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Old 07-11-2008, 11:26 AM   #4
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Location: BUFFALO
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Car: '89 IROC-Z
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Re: Slow crank
whats the CCA rating on the battery? i would think you would need more cca's
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Old 07-11-2008, 11:30 AM   #5
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Join Date: Jan 2000
Location: Rio Oro de Santa Ana, San Jose, Costa Rica
Posts: 19,793
Car: 1984 Z28 Hardtop / 1988 IROC T-top
Engine: 383 Carb / 305 TPI
Transmission: 4L60 / T-5
Axle/Gears: 3.54 Dana 44 / 3.08 10 bolt

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Re: Slow crank
Quote:
Originally Posted by Crossbreed View Post
Just for kicks though, what would cause it to crank inconsistantly?
Ignition timing advanced too far.
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Old 07-11-2008, 11:43 AM   #6
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Location: Abilene Texas
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Car: '87 IROC-Z
Engine: 5.0 TPI
Transmission: 700r4

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Re: Slow crank
My battery has 500 cca but I jumped it off of a car that had 750 cca. I would think that wouldn't matter. I'm probly wrong though.

Quote:
Originally Posted by Apeiron View Post
Ignition timing advanced too far.
I'm sure I have an ignition problem. I may be wrong about the consistant cranking. I'll have to check it later.
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Old 07-11-2008, 11:43 AM
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Reload this Page Slow crank
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