|
|
|
1991 ford f150 won't start
|
|
|
| |
|
|
coyoteugly543
Novice
Feb 4, 2017, 7:36 AM
Post #1 of 17
(3193 views)
|
|
1991 ford f150 won't start
|
Sign In
|
|
1991 ford f150 won't start I am getting some spark at the plug wires but weak spark
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 4, 2017, 9:31 AM
Post #2 of 17
(3180 views)
|
|
Re: 1991 ford f150 won't start
|
Sign In
|
|
Which engine? How did you determine "weak" spark but has it?
Will it prime and run or react at all with some fuel for starting fluid. Need to rule some things in or out for a beginning,
T
|
|
| |
|
|
coyoteugly543
Novice
Feb 4, 2017, 2:18 PM
Post #3 of 17
(3173 views)
|
|
Re: 1991 ford f150 won't start
|
Sign In
|
|
302 motor
just a small spark at pug wire when I crank the motor
no motor not fire at all
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Feb 4, 2017, 4:40 PM
Post #4 of 17
(3161 views)
|
|
Re: 1991 ford f150 won't start
|
Sign In
|
|
Use an adjustable spark tester to get an accurate measurement of KV available. Make sure your battery is fully charged.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
coyoteugly543
Novice
Feb 5, 2017, 7:37 AM
Post #5 of 17
(3136 views)
|
|
Re: 1991 ford f150 won't start
|
Sign In
|
|
new coil didn't help
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 5, 2017, 8:44 AM
Post #6 of 17
(3134 views)
|
|
Re: 1991 ford f150 won't start
|
Sign In
|
|
Why did you do that? Nobody said coil was an issue and you could have tested old one. IDK -99% are good or do nothing at all. Get a spark tester if you think spark is weak. If so it's probably NOT the coil rather a relay or in distributor. It's old and can just blow air thru those and watch junk come flying out,
T
|
|
| |
|
|
coyoteugly543
Novice
Feb 5, 2017, 8:59 AM
Post #7 of 17
(3128 views)
|
|
Re: 1991 ford f150 won't start
|
Sign In
|
|
just trying different things
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 5, 2017, 9:05 AM
Post #8 of 17
(3124 views)
|
|
Re: 1991 ford f150 won't start
|
Sign In
|
|
Try getting a DVOM and spark tester as the original items are tons better than the junk you'll replace stuff with!
T
|
|
| |
|
|
coyoteugly543
Novice
Feb 19, 2017, 11:31 AM
Post #9 of 17
(3065 views)
|
|
Re: 1991 ford f150 won't start
|
Sign In
|
|
ok I got my old ford run but don't want to idle down I had the same problem before I had the problem of not starting
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 19, 2017, 1:07 PM
Post #10 of 17
(3057 views)
|
|
Re: 1991 ford f150 won't start
|
Sign In
|
|
OK - I take that it's running just doesn't come off of a high idle - right?
Try unplugging the IAC (the thing near air intake on 5.0 (302) engines held on by two 5/16" small bolts should idle down if that is stuck or not working properly.
Don't just replace those check first as most fail to a wandering idle not just stuck on higher than it should be,
T
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Feb 19, 2017, 1:25 PM
Post #11 of 17
(3053 views)
|
|
Re: 1991 ford f150 won't start
|
Sign In
|
|
It should stall if you unplug the IAC.
First eliminate all vacuum or air leaks in the system (very important)
. You may have a bad IAC ( idle air control) but try cleaning the throttle body first. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still has a problem, replace the IAC.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
coyoteugly543
Novice
Feb 19, 2017, 2:39 PM
Post #12 of 17
(3038 views)
|
|
Re: 1991 ford f150 won't start
|
Sign In
|
|
yes running just doesn't come off of a high idle
don't seem to be any vacuum or air leaks
I did clean the throttle body
it doesn't do any thing when I unplug the IAC.
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Feb 19, 2017, 2:42 PM
Post #13 of 17
(3036 views)
|
|
Re: 1991 ford f150 won't start
|
Sign In
|
|
Somebody may have adjusted the throttle plate stop thinking they could adjust the idle.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
coyoteugly543
Novice
Feb 19, 2017, 3:32 PM
Post #14 of 17
(3032 views)
|
|
Re: 1991 ford f150 won't start
|
Sign In
|
|
no the bolt is loose
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Feb 19, 2017, 3:36 PM
Post #15 of 17
(3030 views)
|
|
Re: 1991 ford f150 won't start
|
Sign In
|
|
The engine is getting unmetered air from somewhere. If it's not the IAC and not the throttle plate, then you need to find out where.
Use a scan tool to make sure the TPS is coming down below 1V
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
coyoteugly543
Novice
Feb 19, 2017, 3:54 PM
Post #16 of 17
(3025 views)
|
|
Re: 1991 ford f150 won't start
|
Sign In
|
|
no code shows up
what a good way to find vacuum or air leaks
thanks
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Feb 19, 2017, 3:57 PM
Post #17 of 17
(3021 views)
|
|
Re: 1991 ford f150 won't start
|
Sign In
|
|
Smoke machine
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
Auto Repair Home
SEARCH
WHO'S 
LOG 
Lukewarm Heat............
Buy Flualprazolam Powder Online Whatsapp: +1(424) 328-1086
1989 toyota pickup 3.0 crank no start
