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

engine starts without cranking

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Old Aug 19, 2006 | 07:52 AM
  #1  
pontiacpete's Avatar
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From: Sydney,NSW,Australia
engine starts without cranking

i have a weird problem when i put the ignition in run position as soon as i shut the car off while the engine is still spinning the engine starts up without cranking what could be wrong i noticed it while i was playing around with the car to see how fast it fires up after up grading my ignition system could the starter solenoid be the culprit?
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Old Aug 19, 2006 | 09:03 AM
  #2  
j dezzy's Avatar
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From: Massillon, Ohio
Car: 87 TA
Engine: 350
Transmission: 700r4
Axle/Gears: 2.73
sounds like it's dieseling.
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Old Aug 19, 2006 | 09:54 AM
  #3  
nelapse's Avatar
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From: Mobile, AL
Car: GTA
Engine: 383 HSR
Transmission: TH-700R4
Axle/Gears: 3.42
yeah, what is your timing set at? You are dieseling like a ****.
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Old Aug 19, 2006 | 06:35 PM
  #4  
pontiacpete's Avatar
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From: Sydney,NSW,Australia
good call guys my friend who is a mechanic installed a new msd distributor for me so maybe he didnt install it to the correct timing degrees looks like another trip to my tuner since im running an aftermarket ecm
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Old Sep 1, 2006 | 05:02 AM
  #5  
1991Camaroz28's Avatar
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Joined: Jun 2006
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From: Ft. Lauderdale, FL
Car: 91 Z28
Engine: 305 TPI
Transmission: TH700-R4
Axle/Gears: 3.73
definitely dieseling... if you had a carb you could just choke it to stop it... that is how it is on this old mack truck i have at work. it's ghetto as hell but it's fast.
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Old Sep 1, 2006 | 10:24 PM
  #6  
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From: Kingston, NH
Car: 2004 Wrangler Rubicon
Engine: 4.0
Transmission: NV3550
Axle/Gears: Dana 44s with 4.10 and air lockers
Originally Posted by pontiacpete
when i put the ignition in run position as soon as i shut the car off while the engine is still spinning the engine starts up without cranking
Let me make sure I understand this. You are idling in park, shut the car off, but put the key right back to the run position while the engine is still spinning? And the engine starts back up? If so, there's no problem there.

The momentum of the crank still spinning is the exact same thing as the starter spinning it. Crank spins, mixture lights off, engine starts. Doesn't matter if it's momentum from running, the starter, or popping the clutch while rolling.

Simple fix: be patient for 1.5 seconds and let the engine shut off before you start it back up.
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