Question about 1981 Ford F 100

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I have a 1982 f100 cranks runs 5min an cuts off wont start until get cold

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Had this problem once and it was a wire inside the electronic distributor. would bend when it got hot and break contact. when the engine cuts out check if there is spark.

Posted on Mar 22, 2011

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Posted on Jan 02, 2017

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1 Answer

Symptons of bad cps


The first thing you do is read the OBD2 fault codes and check the fuel pressure when it fails to start.

May 10, 2018 | Cars & Trucks

1 Answer

2000 jeep grand cherokee 4.7 has a no crank no start on cold mornings


DOES IT CRANK in NEUTRAL? using fresh PRNDL contacts?
no crank, is easy to diagnose. with just one tool a voltmeter.
12.6vdc is a charged battery , rested, if lower, and not cold its discharged. so charge it or jumper cable crank engine off running donor car. easy huh?
if it cant crank it cant start, (mine can push start or gravity start)
battery cable lugs clean and tight x4 ends? green corrosion?

we then hot wire. the starter solenoid, next. (using old screwdriver as jumper bar)
it cranks now (good starter ) all in 5min work !
it does not crank bad starter.

so it cranks hot wired. good.
so next what is next, easy the KEY line.
the key line runs form the starter to the PRNDL switch and then the KEY switch (crank Start line)
if the car has SKIM immobilizer it cuts fuel not spark.

so i check for 12vdc into PRNDL cranking then key is ok.
if got 12vdc in to PRNLD but not out cranking the switch is bad.
or maladjusted?
its that simple ,with any 10buck DMM off walfarts shelf.

if car is hacked or alarms spliced in, we cant fix it here, its not stock.
same with remote start hack jobs.

Jan 27, 2015 | 2000 Jeep Grand Cherokee

2 Answers

Engine cranks good but will not start.


did you check all fuses with a meter ?
you are new to jeep repairs.... here are some facts.
jeeps have ASD relay.
when car dont start, see what the ASD relay is doing
do not throw parts, you picked the most hard and expensive thing to change on a lark. why do that?
the fuel pressure gauge is $20 and takes 5min to see that fuel pressure is good. not pulling the tank and pump. for fun.
why do that.? (seen 100000 times on forums, this....)
here is mr. ASD, and what to check.
the ASD can cut fuel and spark for many causes. x8

http://www.fixkick.com/Jeeps/ASD.html

automatic shut down relay.

does the relay close cranking? y/n ?
if yes, does it then drop out cranking, y/n?

those are the first 2 tests on all jeeps 1993 to now.

each check discovers what is wrong
so does attaching any OBD2 scan tool and cranking
for 5 long seconds and behold, DTC errors.
got DTC errors cranking/??

BINGO x10.

Feb 27, 2014 | 2006 Jeep Liberty

1 Answer

P2285 code 6.0 litre ford deisel long cranking before starting after starts runs great but oil pressure gauge drops at idle


bad bearings on crank or worn oil pump. Pressure will be up when cold, but will drop when engine warms up. Check for knock in lower end. If so, bad crank bearings.

Jan 16, 2013 | 2004 Ford Super Duty F 550

1 Answer

Truck will not start


check to make sure you are getting fuel, when an electric pump heats up they quit working,then when they cool down they might start workig again until it heats up again. or if you have a performance chip in your pcm they short out pull out chip and see if problem is still there

Feb 16, 2009 | 1999 Ford F250 Regular Cab

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