1984 IGNITION PROBLEM

Reply Subscribe

Thread Tools

Search this Thread

Sep 18, 2018 | 01:43 AM

ardmsrt

Thread Starter

New User

Joined: Sep 2018

Posts: 4

Likes: 0

1984 IGNITION PROBLEM

1984 F150 XLT 302 4 SP: TRUCK HAS BEEN STORED IN BARN 20 YEARS, NOT STARTED
COIL HAS FIRE WHEN KEY ON BUT WHEN TURN TO CRANK, SPARK DISAPPEARS EXCEPT WHEN YOU RELEASE KEY FROM CRANKING. I HOT WIRED TO COIL AND IT GROUNDS OUT SPARK WHEN YOU CRANK TOO. COIL HAS 12 VOLT WHEN IGNITION IN ON POSITION. TRIED A NEW COIL AND SAME RESULTS. NO SPARK TO PLUGS AT ALL, NOT EVEN FROM COIL TO SPARK PLUG WIRE WITH NEW PLUG GROUNDED TO FRAME. OH YES....ACCIDENTALLY FOUND OUT SPARK TO PLUG WHEN KEY ON POSITION. SHOCKED ME...OH YA!!!
SELINOID HAD A THERMOLINK BURNED OUT FROM MISCONNECTION YEARS AGO AND I FIXED THAT. IT SEEMS TO ME THAT SHORT IN WIRE WHEN ENGAGING STARTER, MAY BE WIRE IN COLUMN SWITCH AREA. CLEANED DIST PICKUP, NEW ROTOR N CAP N SPARK PLUG WIRES, NEW BRAIN BOX AND NEW SELINOID. IF ANYONE HAS A CLUE WHAT'S GOING ON PLEASE RESPOND. THANK YOU ! THOMAS

Sep 19, 2018 | 05:01 PM

Franklin2

Moderator

Joined: Jan 2001

Posts: 56,992

Likes: 2,741

From: Virginia

You have 12 volt on the coil with the key in the on position. Do you also have 12v on the coil during cranking?

Sep 20, 2018 | 03:42 PM

ardmsrt

Thread Starter

New User

Joined: Sep 2018

Posts: 4

Likes: 0

NO VOLTAGE TO COIL WHEN YOU MOVE IGNITION TO START POSITION....NONE COIL HAS FIRE WHEN KEY ON BUT WHEN TURN TO CRANK, SPARK DISAPPEARS EXCEPT WHEN YOU RELEASE KEY FROM CRANKING. I HOT WIRED TO COIL AND IT GROUNDS OUT SPARK WHEN YOU CRANK TOO.
BRAND NEW COMPLETE DISTRIBUTOR GOING IN SATURDAY

Sep 21, 2018 | 12:34 PM

jcris

Junior User

Joined: Jul 2015

Posts: 68

Likes: 1

Just went thru something similar on an 86' with an injected 302. Theres a device that hangs off the distributor called a PIP? It could also be located on the fender well. Theres a site called http://easyautodiagnostics.com
Lots of stuff to make your troubleshooting easier

Sep 21, 2018 | 01:11 PM

Franklin2

Moderator

Joined: Jan 2001

Posts: 56,992

Likes: 2,741

From: Virginia

Quote:

Originally Posted by jcris

You had a TFI ignition system. A 1984 302 should still be duraspark II unless maybe it's a California model. The duraspark would have the large square silver box on the fender.

Sep 21, 2018 | 03:54 PM

jcris

Junior User

Joined: Jul 2015

Posts: 68

Likes: 1

I'm learning, slowly.
Jcris

Sep 21, 2018 | 07:00 PM

ardmsrt

Thread Starter

New User

Joined: Sep 2018

Posts: 4

Likes: 0

THANK YUO EVER SO MUCH FOR THE HELP. REALLY APPRECIATE THIS SITE. NOW I UNDERSTAND THE SYSTEM. NEW DISTRIBUTOR BOUGHT N GOING IN SOON. THANK YOU AGAIN jcris!!!