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2001 jeep grand cherokee stalls as i coast to a stop,jest had a tuneup

The plugs were replaced and the coil pack some time stalls as in pu away from stop

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  • Cars & Trucks Master
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I would check the fuel pressure and take a look at the throttle position sensor and the idle air control valve.
Most of the time stalling on take-off is a lack of fuel, and stalling at idle is a lack of air going thru the control valve or the throttle body.

Posted on Dec 10, 2012

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I have a 2003 jeep grand cherokee, It started


wow, no engine option stated, and no DTCs.

4.0L I-6 or 4.7Liters?

WHY DO THAT FIRST. $$$$ parts first.

why not do a tune up first.

you swap in the most expensive parts first? ouch,

The PCM tells you when ckp or cmp fail, with DTC codes

so its not that. but you never posted ALL DTC errors. why not do that.?

do a real tuneup? heat (spark plugs, filters.)

if you have P030x errors,

eg: p0301 is cylinder #1 is misfiring (3 ways to do that not JUST spark)

eg: P0300, random on all cylinders. (fuel mix wrong) or never tuned up.



Misfire 101; (example P0301 DTC)

P030x codes, are all just about spark, misfire is caused by 3 things, (at least)

1: sure spark. weak. (tuneups work as does hV wires sets if no COPS) if 1 cop is bad move it to other location, does failure follow the move>???????? buy new cop boots if engine has cops.

COPS means coil over plug, so v6 has 6, v8 has 8.

coil packs have 3 coils inside for v6 and 4 for V8. called wasted spark to any tech.

2: low compression, think of your v6 (is it) as 6 engines, not 1.

3: wrong FUELING rates. including air leaks to 1 cylinder.

if engine has EGR that too, will cause gross misfiring.

so can an air leak near one intake runner, causing 1 cylinder to misfire.





why not scan it with a real scan tool that can see ALL jeep codes

then post all DTCs found. both idling and driving for 45mph or 1/2hr.

with these facts and what engine is there we can do the remaining tests.

free book



http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service







The tune up is this and filters.

do the tune up, new wires, and plugs using correct spark plugs not some bs, magic ones, use spec, plugs first. its in the manual.

then HV wire set on 4.0L,

if cops V8 , 4.7L try new boots on them. or swap them to find bad one.

the USA car V8 has coil on plugs





misfire means ONLY that this cylinder has weak COMBUSTION

its not weak spark only, that is only 1 cause of poor combustion.



post DTC\'s driving and we can fix it

the best tool is the

Innova 3160 scan tool, that is what I use on home cars.

it does all jeep codes, ALL.

i can drive , and scan and log DTCs.

and gather lots of facts on errors.

that is always the best way,

you can not fix cars today with out owning a scan tool.

unless , luckiest man on earth. (guessing)

Sep 17, 2014 | 2003 Jeep Grand Cherokee

1 Answer

Jeep grand cherokee crankshaft position sensor replaced but still given a weak spark


the coil. ? older post.
the PCM reports even one drop out of 10 , on the CKP or CMP sensors. 99.9% of these changed are good.
why not tell me what you have,? full symptoms and evidence.
got P030x misfiring? are you even using a scan tool,? or working blind.
may be its the coil.?
can can you feel the misfiring.c
can you see the engine shake? all of this is evidence.
do not miss out on that.
does the scan too shop pending misfire codes?
stored codes, or codes while driving, learn to use the scan tool.
do a 60k mile tune up yet?
your engine is not COP coils like the V8
its COIL rail that is a COIL pack with 3 coils inside
that runs 2 sparks each called WASTED park.
so did you try new sparkplugs(dah)first then new coil pack wires HV
next , then a new coil pack last.
start with the cheap spark plug and wires, (called a tuneup)
then pop for coil pack./
misfire can be clogged or leaking injectors too, and that ill skip
with out you using the scan tool fully.

Mar 29, 2014 | 2002 Jeep Grand Cherokee

1 Answer

2000 Jeep Grand Cherokee intermitantly stalls in the Rain


3 problems and no engine stated.
oldest story ever on gas engines.
1: for the transmission question, check levels and scan it yet?
2; in the rain. questions, ever get tuneup this decade
no engine stated.
if the crank sensor, has 1 bolt do not play with it ask how to do it and not wreck the new one. ok? as seen on 4.0L engines.
fuel gauge can be bad fuel gauge sender.
stalls 101: (1 top cause of 50)
if you scan it ,at the stalls it will tell you why it stalled. most times.
ever try new spark plugs.>?(and filters)

4.0L or 4.7L engine? gas. which one.
4.0 has a spark coil RAIL, making owners fear spark plug changes.
(bad to the bone that) and the coil pack can be just dirty
and when it rains it conducts HV electrons and shorts. until dryer.
same here but different.
the 4.7L has 8 coil packs, COPS, any can fail, boots fail
and sure bad spark plugs, no spark plug made last the life of an engine, so is called a TUNEUP part.
or SCHEDULED SERVICE POINTS (prevention)

if 4Liter engine the inline 6

this red spacer must be used on all news CKP sensors
or the next startup wrecks the new sensor
seen on this forum 1000s times, and now car as dead spark
sad to watch.
the paper and glue spacer is 0.030" think, 30 thou !
(took lost of work to learn how think, got it from maker)
most schlock stores sell it lacking this key #6 part.... adding to the pain.

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Mar 09, 2017 | 2000 Jeep Grand Cherokee

2 Answers

How to replace spark plugs on 2000 jeep cherokee classic 6 cyl.? Also does 2000 cherokee have inline fuel filter?


TO REPLACE SPARK PLUGS YOU REMOVE COIL PACK MOUNTING BOLTS THEN REMOVE THE COIL PACK WITH BOOT OVER THE SPARK PLUG.YOU HAVE 6 INDIVIDUAL COIL PACK TO EACH CYLINDER. YOU NEED A 3/8 RATCHET WRENCH - LONG 3/8 EXTENSION -SPARK PLUG SOCKET - SPARK PLUG GAUGE.AND TORQUE WRENCH.THE 2000 MODEL JEEPS FUEL FILTER INSIDE THE TANK.1993 - 1996 MODEL JEEPS FUEL FILTER LOCATED LEFT SIDE OF THE VECHICLE NEAR THE FUEL TANK.

Jul 20, 2010 | 2000 Jeep Grand Cherokee

1 Answer

Changing spark plug wires on 2001 Jeep Grand cherokee


yah direct ignition coil pack does away for the need a a distributer cap and rotor.much higher energy ignition system where the computer tell when to fire.if that helps.not hard to change.as long as you change them one at a time so you don't screw up the order.

Nov 27, 2009 | 2001 Jeep Grand Cherokee

1 Answer

Misfire code on 2001 2wd jeep cherokee what can we try


I would lean toward a dead coil pack or a dead plug, there is no way to test the coil pack other than removing it and keep the wires plugged in and install spark plugs in the grommet cavities of the coil pack and check for spark across all cylinders( assuming its a 4.0L)

Apr 21, 2009 | 2001 Jeep Cherokee

1 Answer

1997 Grand Cherokee stalls at speed and at stop signs


Mine does the same thing when the oxygen senor goes out... About every 70k miles. doesn't always turn on check engine light

Jan 17, 2009 | 1997 Jeep Grand Cherokee

1 Answer

Jeep Hesitates. P0303 code


Check the cylinders Commpression. over 115 psi is good, 120 psi is normal.

Sep 17, 2008 | 2001 Jeep Grand Cherokee

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