Question about 1987 Ford F 150

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After running awhile restarting acts like a weak battery if I wait a long time it cranks over great even even when freezing it also sputters when accelerating under load uphill

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MAYBE A CATAYLIAC CONVERT IS GETTING HOT NEED TO REPLACE OR GUTTED OUT

Posted on Mar 14, 2011

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Posted on Jan 02, 2017

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I have a 1999 Jeep Grand Cherokee and lately it's been having weird issues. It will starts right up usually but on occasion it will attempt to turn over and won't start but if I wait and try again it'll...


so pulling the gas tank is first? really?
no engine stated, so must guess... on parts. 4.0l or 4.7liter?/?????? the 4.7 has 8 cop spark coils. so????
the 4.7 is a V8. so??
Cops or not make big differences.
ever get a full tune up this decade, white all parts.
if COPs with new boots? spark plugs, and air filter??

the ECU also tells you at stall why it did, most times, the not looking
makes it 10x harder to find, the ASD relay may of dropped out.
(with DTC missed by you)
the PCM works OT, to not allow stalls, so if it did, its real bad.

here is how ASD works
http://www.fixkick.com/Jeeps/ASD.html

now stalls, in the macro views, (physics)
1: lost 12vdc to PCM or spark
2 lost compresion to any or all cylinders.
3: lost or weak spark or ASD drops off , then engine dies.
4: bad fueling, (too much or too little for many reasons.

so the fast right foot fails to keep it going
that means ASD DROPPED OR fuel is cut or it flooded
so if it dont start and its seems flooded, snif sniff, then use super secret unflood mode, cranking wot, wide open throttle cuts all fueling clearing said flood,
if it wont start, pull in mr. obd2 scan tool
crank for 5 seconds, and release key (not off)
scan tool tells you most the time why.

dont be blind learn to use a scan tool and they are cheap.
less that 2hours shop labor. so.... its and investment. grade. thing.
with future pay back and even profit, (do the math)
i have a innova 3160 just for my jeep and 6 more for other cars.
this tool sees ALL jeep codes, factory codes and full live data.

Jan 24, 2015 | 1999 Jeep Grand Cherokee

1 Answer

Starter/Electrical Issue


It sounds like a bad starter. You can have the starter tested at a place such as Auto Zone or Advance Auto, but it needs to be taken off the vehicle.

Apr 10, 2014 | 1996 Nissan Pickup

1 Answer

2001 4.7 dakota, after running awhile and you stop truck will not start for about 30 to 45 min. It cranks and sputters like it wants to start then shuts down. you can do this many times and it will n


Ever check fuel pressure at the motor

The fuel pump could be as old as the truck
& worn out

Has the filter ever been changed?

Ever look at any data on a road test with a
professional scan tool

Mar 04, 2013 | 2001 Dodge Dakota

1 Answer

SLUDGE AND BLOWN HEAD GASKET


Why did you put antifreeze in the oil. Beyond me.

Mar 08, 2017 | 2000 Chevrolet Blazer

2 Answers

1999 chevy malibu, stalls, no restart after getting to running temperture. fuel ok, cranks but misfires when hot. cools down and starts. runs good cold. crank sensors ok


Sounds to be a bad ignition module or one of the coil packs. Will need a scan tool to know what cylinder (s) are misfiring in order to narrow it down.

Jun 30, 2009 | 1999 Chevrolet Malibu

2 Answers

JEEP coughs or sputters and dies, and then won't restart.


I have the same problem did you find what to fix.

Sep 30, 2008 | 1987 Jeep Wrangler

2 Answers

Some times it starts up just find ,the next time it don't want to


hello,
This could be a few things.
First i would check the fuel pressure,you could have a weak fuel pump or clogged fuel filter.
you could also have a bad temp sensor.there is two of them on your car.

the question I have is; does it do it when it's cold or warm?
you always want to start from the least to most expensive.
good luck

Jul 21, 2008 | 2002 Chrysler PT Cruiser

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