Starting problems
Thread Starter
|
Senior User
Joined: Sep 2007
Posts: 436
Likes: 0
Starting problems
I have a 78 f150 i have been having issues with the truck not starting, just clicking once, per key turn. I replaced the alternator, battery, solenoid and voltage regulator. The only thing left is the starter itself but i don't think it's the problem since it will start sometimes or if i put my jump pack on it. I'm at my wits end with this thing.
All last summer it was hit or miss with this thing starting or not. Any help would be great..
All last summer it was hit or miss with this thing starting or not. Any help would be great..
Posting Guru
Joined: Mar 2006
Posts: 1,182
Likes: 1
the alternator and voltage regulator aren't really in play here, and i don't think the timing just being 'slightly' off would matter, either.
and you've replaced everything else...except maybe the ignition switch.
try jumping it with a screwdriver (or better yet, a remote starter). if that works consistently, make sure you're getting 12v at the S terminal of the starter relay with the key in 'start'.
if that's not the issue...pull out your voltmeter and start tracing the voltage from the battery down to the starter- see where it stops (or drops off significantly).
if all that fails to resolve it...you're probably down to the starter itself.
and you've replaced everything else...except maybe the ignition switch.
try jumping it with a screwdriver (or better yet, a remote starter). if that works consistently, make sure you're getting 12v at the S terminal of the starter relay with the key in 'start'.
if that's not the issue...pull out your voltmeter and start tracing the voltage from the battery down to the starter- see where it stops (or drops off significantly).
if all that fails to resolve it...you're probably down to the starter itself.
Moderator
Joined: Nov 2007
Posts: 22,415
Likes: 92
From: Denver Metro Area, CO
I agree with rustywheel above....
Measure the voltage at the following places:
+ battery terminal
+ battery cable at the battery
Where that cable attaches to the solenoid.
The above should be all VERY close to each other.
Have someone turn the key to START while you measure at:
The other side of the solenoid.
Where the thick cable attaches to the starter motor.
If you're getting full (or very close to it) battery voltage at the starter, the problem could be a bad ground (at the starter or the battery <-> engine connection), the starter itself, or the engine isn't capable of turning.
Measure the voltage at the following places:
+ battery terminal
+ battery cable at the battery
Where that cable attaches to the solenoid.
The above should be all VERY close to each other.
Have someone turn the key to START while you measure at:
The other side of the solenoid.
Where the thick cable attaches to the starter motor.
If you're getting full (or very close to it) battery voltage at the starter, the problem could be a bad ground (at the starter or the battery <-> engine connection), the starter itself, or the engine isn't capable of turning.
Thread
Thread Starter
Forum
Replies
Last Post
BlackLabel78
1973 - 1979 F-100 & Larger F-Series Trucks
2
Nov 19, 2009 04:01 PM
kalebharr78
1973 - 1979 F-100 & Larger F-Series Trucks
3
Aug 15, 2009 02:02 AM
bigblu78
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
4
Jun 2, 2006 10:42 PM
