Question about 1990 Ford F150

1 Answer

All new ign parts no spark need to replace pcm ? where is pcm?

Cant get truck runnin no ign . plugs, wires, coil, starter, relay, what else? i want to change pcm but cant find it can you help?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Ford Master
  • 5,568 Answers

Have you replaced or checked the crank position sensor? I think your truck has one. You didn't include the engine type your truck has so this is the closest I can give you:
F150 CPS

Posted on May 13, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Ignition coil problematic primary feed


older post.
how many miles, how many miles for the last tuneup.????

The PCM CREATES spark. on all cars since about 1991.
the only changes are where they hid the IGNITOR.
or how may spark coils you have.
my guess, is your enigne is 3.8L just like my 08
where is the coil pack, well see those spark plug wires.
the go directly to the top mounted coil pack. see that?

the PCM monitors the rail coil , the 3.8 has a 3 COIL pack.
and each coil runs 2 cylinders. like this.
so what is the first thing to do here.
easy , put in new spark plugs.
try doing the tuneups. in the glove box guide.
page 433 , at 102,000 miles. spark plugs and cables.
mine has only 60,000 miles, and they both were bad.
spark plugs and HV, wires so I upgraded to NGK mag wires.
and new NGK plugs.
if it still fails, then try a new coil pack.


HV= high voltage wire sets.

Mar 07, 2014 | 2008 Jeep Wrangler

1 Answer

2002 CHRYSLER CONCORDE, 2.7 HAS NO IGN ENG HAS BEEN REBUILT. TIMING DOUBLE CK, CRANK AND CAM SENSORS REPLACED. POWER TO COILS CKD OK. FUEL INJECTORS WORKING PROPERLY, BUT STILL NO IGN SPARK. HELP!!!!


Check that the wiring harness to the coils is getting 12v, this will confirm if the pcm is sending a signal for the sparks to fire. Check the ignition coil is sending spark to the plugs with a spark plug tester.

Oct 14, 2013 | 2002 Chrysler Concorde

1 Answer

Why will it not start


does it backfire ? if so try resetting distributor , check timing , also check compression .

Mar 13, 2012 | Cars & Trucks

1 Answer

I have replaced the spark plugs, wires, coil, distributor cap & rotor, coil wire and my 92 wrangler, 4.0 L HO will crank but not start. I pulled a plug and grounded the casing, cranked the engine and...


a good start, (no pun) spark renewed parts
good. always good. a full tune up.. for real. (spark)

that distrib device is called a CMP, cam sensor!
the flywheel has CKP sensors. to...

but the reason you cant find this is you lacking a scan tool.
the PCM can cuts spark for many reasons.
the ASD relays does that. by command of the PCM

The PCM drops the relay for 1 to 8 reasons.
minus 1 , your car has no IMMO SKIM key.
but here is how to diagnose all JEEPS, (not fake MK jeeps)
first is to understand the ASD relay.
http://jeepdied.com/ASD.html

to do the tests takes 2 persons, unless you are a Xmen. guy.
the JEEP LAW OF 2 SECONDS must not be ignored,
2 full seconds. rule.
this rule applies to spark and fuel,

1:fuses good. test them.
(key on CEL glows, check engine lamp must glow or PCM has no power) does yours?
2: man 1, cranks. (car can crank with DEAD PCM) yup.
3: man 2 , (or WOman) tests spark using a test spark plug
at say #1 front, (easy bend over) lazy we are.
use a real spark plug. ok>? new. or not shorted.,
you ground the shell (this is a 100 year old test, not magic and is done by every mech, alive.) google how to test spark
and not get electrocuted, (got a pace maker?, keep hands in pockets)
4: the key on ASD closes and engine cranks and spark happens for 2 seconds, or not, if the spark ends just as the ASD drops
you KNOW NOW FOR A FACT THE PCM DID THAT ON PURPOSE>
a hard cold fact.
if there was not spark for 2 full seconds, then sparks dead.
the PCM must be scanned.,
if you cant scan you get to shot gun all day.
i have a scope , you dont but i can see if the pcm is pulsing the COIL.
you cant. so get to guess that too.
if the PCM is not pulsing said coil (lets pretend coil is good, i can bench test them, easy)
then the PCM has BAD INPUTS>
CMP
or CKP
tops the list. of shot guns, seems like 1000s replaced here
and not one fixes it.... but goes on.. .. and on because....

best is to own a scan tool to fix any jeep 1991 to now.
or go broke every time a part gives up the ghosts.

the keyon 3 times tests.
can find problems , but NEVER ALL problems, its blind to many.
its just toy really, but has value, if if works.

Mar 26, 2017 | 1992 Jeep Wrangler

3 Answers

1992 CHEROKEE NO SPARK NEW COIL ALTINATOR WIRES


Ground wire to radator support on top left right next to hold down bracket. Or possibly crank sensor.

Jan 18, 2010 | 1992 Jeep Cherokee Briarwood

2 Answers

Replaced..starter..ign switch..relay


check the compression change spark plugs and wires and check distributor and cap

Nov 03, 2009 | 1994 Nissan Pathfinder

1 Answer

Engine cranks wont start


i do believe that's what it is if it will not let get a diagnostic or if it will not let you access the computer the computer is bad.

Aug 26, 2009 | 1997 Dodge Ram 1500 Club Cab

2 Answers

1985 gran fury. i've changed the distributor,the brain, the coil, the ign. relay, and the rotor and cap. the car fires when it wants to . more like it starts every other day i have no clue what to do


I'm going to assume you have a 318? Also going to assume that the wires and plugs are in good shape? When it's not starting, do you have spark? If not, do you see spark for any part of the time when you crank it? Have you made sure that the carb is OK and not flooding the engine?
What I just said is'nt a "fix...yet...I need to know this stuff first.

Jun 14, 2009 | 1985 Plymouth Gran Fury

2 Answers

No spark to plugs or coil.


Do you have power to the coil with the key in the run position and when cranking? (ignition switch)

Mar 26, 2009 | 1987 Ford F 150

1 Answer

1996 S-10 cranks but no fire


did you check to see if fuel pump is pumping. fuel filter isnt clogged is it? but you're sure there is no spark. because if there is spark it could be air flow problems.
and you changed the ignition switch so that's not it, how about the starter. is there any noise coming from the starter when you turn key? if it isn't lined up right.
there has to be spark if you did what you said take off a wire at night and try it . electricity to start goes, ign switch battery starter(is there a relay on s10s cant remember), the alternator is here also.to coil/distributor to wires to plugs to gasoline

also it could be the wires coming from the battery , check them for corrosion. if they are really corroded could be problem. and make sure your ground is good contact. ive seen corrosion inside wires causing no spark.
just a few ideas to check.

Feb 25, 2009 | 1996 Chevrolet S-10 Pickup

Not finding what you are looking for?
1990 Ford F150 Logo

Related Topics:

180 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

75117 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

fordexpert

Level 3 Expert

5474 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...