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Misfire after tuneup

Whie driving it sputters at any speed

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It's Possible that you got the wires mixed up.

Posted on Nov 03, 2012


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My 1996 jeep Cherokee xj will sputter out and die when I put it in drive but when I put it in reverse it will stay running and driving

my guess is the gearing , that reverse has is very low.
and with lower gearing a weaker engine can run
id bet you if you use your right foot, on the throttle as you
go to drive, it will move, or use L gear.
the sputter, is not related to the transmission
Sputter is gross misfiring of the engine, 4.0L?? what engine?
and the top cause of that. is not getting a tune up.
spark plugs. ever do those in 10 long years.'
or spark wires>?
filters, fluids and spark? a tune up.
the Jeep runs a map sensor, so does not sputter with air leaks.
the jeep IAC can stick. and not hold an idle ,in drive.
but you can with a fast right foot, if not , its gross misfire for sure.
your right foot is not gas its air
when you press the throttle you add air and the EFI matches air with fuel. in that order
so if it still sputters, is not the lack of air. see?> spark is next,.

for 100 years folks avoid tuneups, is that you? the classic cause?

Dec 11, 2016 | 1996 Jeep Cherokee

1 Answer

1999 Sport 4×4, 4.0 liter. Why does it sputter and stall in Drive?

all engines not tuned up do that. ! no engine size stated !
case in point, bad spark plugs....
ever do a tune up this decade? or ever?
spark parts, filters that? (open oper guide read 60k service and up)

reverse is a very low gear, and as such, a very low engine load
but drive, (1st ) needs more power. to move car faster.
and all spark plugs bad (old) on earth, just hate loads.
loads are when it misfires.
this is taught in school, ASE,
we put a bad spark plug in to the pressure spark tester
and watch it fail under pressure (loads).
same answer for 100 years.
my grandpa;s shop even in 1950 had one on the bench.
to prove to customers (non believers) that your plugs are bad.
we do tuneups now...
there are over 50 causes of misfire.
ill not attempt post them all
but I'll say, we do from 1 to 10 tests, and bingo.

one tests is the simple scan tool
connect it, got P03xx codes (DTC'S) bingo ? 2?
btw bad spark plugs will show up as P0301 up to (04 or 06)
06 be v6

Oct 22, 2015 | Jeep Cherokee Cars & Trucks

1 Answer

2000 tundra v6 5-speed cold start truck runs great, park it for 20-30 min it will start fine but after going 1/4 mile it dies, looses power. pull over and it will backfire and sputter until it eventua

bad need of a tuneup? like new spark plugs, ?
172 , is 02 rich/ lean warning. this one is low oxy for rich.
this code can just be a victim. for sure , with misfire.
means 02 sensor stuck at rich,
what is water temp in engine coolant, at failure? less than 150F?
could be lots of things.
leaking injectors, bad fuel.
injector sticking> causing misfire.
id use a scan tool and watch all sensor when it fails.
too high fuel pressure.
misfires cold, but only luke warm cold starts not fully cold.

just one DTC, no P0300 or 30x misfire codes, not even P0300 pendings?

Jan 31, 2014 | 2000 Toyota Tundra

1 Answer

Engine 4cy

misfire, at idle does cause, too low hot idle .
ever do a tuneup , the full 60k interval service? nows the time.
if it is tuned up. then trouble shoot misfire.
if you want to do that, post back. there are many tests.
most take tools, are you willing to buy tools. or do you want helpers
to just guess?
causes (macro)
1: a bad engine, (50 ways) but low compression tops list.
2: bad spark (tuneup, or failure) test spark.
3: bad fueling. (too much or too little) there are tests to do.

you have only 2 choices, guess, or tests.
which will it be.?

Oct 30, 2013 | 1998 Honda Accord

1 Answer

98 Nissan Maxima runs good for about 5 minutes and then sputters, when I give it gas it seems like it is flooding or not getting enough gas. After this problem starts it will take a while to run good...

the egr on most cars , is a 50k mile service point (cleaning)
ever do the 60k mile tuneup (service sch. list? )?
if tuned up (spark parts, (list) all filters )
then it can be ? EGR sticking open, love to do that just before a stop sign, is its hallmark of messup.
So is the ISC (idle speed contr. valve,electric) this stick , yes clean it.
barring that..
with all otto cycle engine, there are 3 simple paths.
1: good engine, (some fail hot only)
2: good spark (yes, tuneup deal)
3: bad fueling, yes, as you said, too lean or too rich.
if the engine is good, (compression good)
and the tuneup gives you good spark and good timing.
we land on bad fueling , in that order.
going backwards can result is 3 weekends shot.

so fueling, Ill pretend its fueling and that 1 and 2 are ok.
in the service manual they cover this with tests.
Is the check engine lamp on key on the goes out running,
if not, why not connect a scan tool, (USA answers, all mine)
In canada , the EGR and other errors (misfire) are ignored by the ECU (no CEL warning) so not posting country puts me in hand cuffs.
1: remove spark plugs. are the they soaked in fuel, 1 or all.?
2: if dry , good.
if wet , check for bad injector rates and root cause.
if dry. then you need a scan tool to see if 2 things are good.
1: engine idles hot, in closed loop, if not fix that.
2: light fast cruise, (no hill) does ECU hold Closed loop status.?
3: if those are ok, does the LTFT say near center.
most cars run -4% not -25+ or +25%
LTFT means long term fuel trim.
when running look for pending errors. and live errors and stored errors, they are called DTCs

Drive-ablity issues are the most complex , just before intermittent.
huge books exist on topic.

here is one more of the many,(misfire )
induction air leaks
what we call this is gathering evidence. (after the tuneup)

Oct 12, 2013 | 1998 Nissan Maxima

1 Answer

Sputters- low idle

sounds like bad plug or wires

Sep 07, 2013 | Jeep Cars & Trucks

2 Answers

My jeep sputters like it wants to die out but doesn't and no check engine light

try new spark parts yet, called a tuneup.
on this old, wires and spark plugs.

i pay no attention to the CEL, i scan them all
you do know that the CEL does not come on for all fails.
and in canada, lots more. missing.
scan it , and do so when it messes up in WIN.

my guess,no full tuneup for last decade.

Jun 21, 2012 | 1997 Jeep Wrangler

1 Answer

My Cherokee Laredo sputters while driving periodically.

is this a how to diagnose it question or a kids guessing game.
we can guess all day, even all week, your CALL !
1993 still running a "Kodak moment"?
that is called MISFIRE, there are over 50 cause of that.
are you going to guess up to 50 + times> ? id hope not.
and all misfire causes engine power loss, (all)

ZJ jeep
3 engines, 5.2L is yours.
ever put in new spark plugs??? in last 10 years?
you cant burn fuel with bad spark so this is like #1 for 100 years+
gas engines....
test 1, can you save the stall, with a fast right foot
if no, the you lost 12vdc to key EFI parts or its fuel problem
this be 2nd after new spark parts, (a tuneup is always first of owner does NOT do proper service)
why spend 4 hours shop labor only to find , omg,100,000 mile old
tuneup parts, (big cash to learn they dont last a life time)???

filters (both)
spark plugs.
if those old ratty spark wires are 24years old, they are hopeless
distributor cap, same thing
distributor rotor same.

if it still misfires, it can be injector problems. (lots of tests here)

even engine cylinder compression low, we always check 90s cars for this, after all its OLD.
generic, data; on 5.2. 9.1:1 CR sea-level spec only.
150psi x8. wide open throttle or more.
read data shows
1993-1998 Grand Cherokee. 5.2L v8 9.5:1 CR, 180 PSI
ask how to do that test correctly.

This 1993 the check engine lamp can glow, running?
if it is? , it must be scanned to find the codes, DTC errors
Innova 3160 tool can do that.
or most good shops. or even the Actron CP9145 (used onlY)
the latter tool is the Bee's knees on old cars. with EFI.

Mar 24, 2017 | 1993 Jeep Grand Cherokee

1 Answer


To start off has the car had a good thorough tuneup lately? Plugs, wires, coils, fuel and air filter?

Jun 29, 2009 | 1992 Ford Taurus

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