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No spark problem

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Uncle Ishy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Uncle Ishy Quote  Post ReplyReply Direct Link To This Post Topic: No spark problem
    Posted: Jun/10/2021 at 2:55pm
Hello I am new to the site I have a 1971 AMC javelin with the 360 I have no spark I have replaced starter solenoid the ignition coil, cap, rotor, points, plugs and wires, voltage regulator,and the ignition relay I have 12.1v both pegs off the coil and still no spark oh and the car will not turn over by the key it will only crank by jumping the starter solenoid any helpful tips would be awesome I'm at my wits end have been working on those for 3 days in a row with no luck
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304-dude View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 304-dude Quote  Post ReplyReply Direct Link To This Post Posted: Jun/10/2021 at 3:10pm
Obtain a TSM, they are handy.

I assume a grounding issue. Check engine ground at the motor mount and ground cable from battery to engine.

Points set at .170" ish should be in the ball park.

Check ignition switch on the steering column for proper operation. They become crusty with age, and wear out. I had my 73 Javelin ignition switch harden with time, from California heat in the mid 80s. Roughly 10 years since driven off the line.

71 Javelin SST body
390 69 crank, 70 block & heads
NASCAR SB2 rods & pistons
78 Jeep TH400 w/ 2.76 Low
50/50 Ford-AMC Suspension
79 F150 rear & 8.8 axles
Ford Racing 3.25 gears & 9" /w Detroit locker
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Heavy 488 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Heavy 488 Quote  Post ReplyReply Direct Link To This Post Posted: Jun/10/2021 at 3:16pm
Does that year have a seatbelt interlock?
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Midnight Rambler View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Midnight Rambler Quote  Post ReplyReply Direct Link To This Post Posted: Jun/10/2021 at 3:17pm
Would Uncle Ishy be able to jump the starter solenoid if the neutral safety switch was bad or mis-aligned?  Anyone have a wiring diagram?

'66 American 440 Convertible 290/WC M-37/AMC 20 3.15/PS/PB
'04 Jeep Wrangler X Rocky Mountain Edition 4.0 5sp
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Midnight Rambler View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Midnight Rambler Quote  Post ReplyReply Direct Link To This Post Posted: Jun/10/2021 at 3:18pm
Originally posted by Heavy 488 Heavy 488 wrote:

Does that year have a seatbelt interlock?


Similar to my thought process!Wink

'66 American 440 Convertible 290/WC M-37/AMC 20 3.15/PS/PB
'04 Jeep Wrangler X Rocky Mountain Edition 4.0 5sp
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304-dude View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote 304-dude Quote  Post ReplyReply Direct Link To This Post Posted: Jun/10/2021 at 3:57pm
74 on up has interlock. 73 has the buzzer only. 71 are like previous years. He said spark issues not crank issues. If cranking does not happen in park and only works in Neutral, the neautral saftey switch is the problem. ENGINE Ground issues will not allow coil to collapse the field when points close... thus no spark.
71 Javelin SST body
390 69 crank, 70 block & heads
NASCAR SB2 rods & pistons
78 Jeep TH400 w/ 2.76 Low
50/50 Ford-AMC Suspension
79 F150 rear & 8.8 axles
Ford Racing 3.25 gears & 9" /w Detroit locker
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Heavy 488 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Heavy 488 Quote  Post ReplyReply Direct Link To This Post Posted: Jun/10/2021 at 4:30pm
Says car only cranks by jumping solenoid also.
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mstrcrftr View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mstrcrftr Quote  Post ReplyReply Direct Link To This Post Posted: Jun/10/2021 at 4:43pm
after all of that.. i would suggest you pull the distributor cap and see if the rotor moves when cranking.
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Uncle Ishy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Uncle Ishy Quote  Post ReplyReply Direct Link To This Post Posted: Jun/10/2021 at 5:10pm
Rotor does move while cranking from the starter solenoid still have nothing off of the ignition can turn all power on by the ignition but will not crank by the ignition
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ramblinrev View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ramblinrev Quote  Post ReplyReply Direct Link To This Post Posted: Jun/10/2021 at 6:01pm
Originally posted by Heavy 488 Heavy 488 wrote:

Does that year have a seatbelt interlock?


No., all '74,  only on the interlock.
74 Hornet Hatchback X twins
62 American Convertible (still worth the $50 I spent in 1973!) AMCRC #513, AMO #384
70 AMX 360 4-speed
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