Question about 1996 Isuzu Rodeo

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V6 Misfire, very Wet plugs #3 and #2

Starts instantly. Excessive fuel in exaust, gets worse as engine warms. then will stall. PO141,155,and 300. Changed O2's. Spark tester ok on both wet cyls, switched ignition packs on both - no change. Compression same on all 6 cyls. Drained fuel and changed fuel filter.

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Did you change plugs and leads?? doubt its fuel coming out exhaust as most exhausts on vehicles change the emissons to water in the exhaust thats why its wet

Posted on Aug 28, 2008

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2 Answers

2002 rodeo, starts and when put on gear stalls


Automatic transmission ??
Check engine lamp illuminated ??
Cold engine idle speed ??
Warm engine idle speed ??
IAC (Idle air control) system operation ??

May 28, 2015 | 2002 Isuzu Rodeo

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Po301 number one plug on block 2003 ford windstar v6


the code means a misfire has been detected it could be a few things so check for (a) take out the plug/s and check the boots for cracks by flexing the boot back n forth and by squeezing it the littlest crack will leak voltage from + to the - and thus a misfire (b) a antifreeze leak that is running down into the cylinder will show a wet plug === instant misfire (c) to much dielectric grease on the plug wire boots will liquefy and run down the plug from a running hot motor====instant misfire (d) cracked insulator on the plug (porcelain white part)====instant misfire(e) plug wire insulation is burned or melted ==== instant misfire (f) coil towers has a hairline crack here's one /or the plug is broken on the inside you must use a magnifier glass to find them and this is best for all crack finding issues anything you suspect in the slightest crack is definitely the cause (g) dirty injectors will do it too so you see it's not as easy as you may think please post back with progress and all symptoms still present after work done I'm a 40 year taxi/regular mechanic and every thing will be done for you till we get there even at 3 a.m. we'll get to the cause stephen
po301-number-one-plug-block-2003-ford-e55ym4yfoakecu3igrpxadps-2-0.jpg

Mar 07, 2015 | 2003 Ford Windstar

1 Answer

Have a 95 tb 4,6 it starts fine but then it starts acting like it is only running on 4 cyinders an if i give it trottol it dies


Does it get better if you warm it up? Temp sensor.. Is it worse under load? Plug wires. Ford v6 that year used to eat plug wires...
Fuel to the injector bar doesn't always mean good fuel pump. Check pressure.

Jan 31, 2015 | Cars & Trucks

1 Answer

Xr6 2004 5speed turbo when u put foot down it starts missing any one know how to fix they tell me it's a common problem with this ba model


A fouled or worn plug (spark gap too big) can do that. Also a bad ignition wire can do that. These are especially suspect if it is a particular cylinder that is missing. You may be able to ID it if you get a check engine light and the code is misfire cyl no. 3 or something like that. If it gets worse in rainy / damp weather, suspect a coil pack, spark plug boot or spark plug wire getting wet. If it is not a specific cylinder it may be a clogged fuel filter causing insufficient fuel pressure during high demand such as acceleration or pulling a hill.

Oct 19, 2014 | Cars & Trucks

1 Answer

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

02 Toyota Tacoma when engine warms up cylinder 3 has a misfire po303


check spark plug of the cyl. switch plug with another cyl, run engine until warm to see if misfire still comes on. if it stays on the same cyl. fault could be high tension wire or coil or worse leaky valve or rings. if misfire switched to the other cyl just change plug or better replace all plugs

Mar 16, 2014 | Cars & Trucks

2 Answers

When it rains or is wet out the car starts but idles funny, it sputters and sounds like the engine is choking or stalling. The problem goes away when the car warms up.


try new plugs,leads and caps, it sounds like the ignition spark is tracking and causing a misfire, moisture helps this happen, but there must be a crack or problem with the insulation

Apr 08, 2011 | 2001 Kia Rio

2 Answers

2001 Pontiac Montana - what is a misfire #5?


Without your actual trouble code, I am assuming that you are have a misfire on cylinder # 5. The computer cannot really tell what is causing the misfire only that cyl 5 is not putting out full power. If it misfires when cold then smooths out as it warms up, I would say it is probably an injector that is sticky, as it warms up it starts working properly.

Apr 29, 2010 | 2001 Pontiac Montana

5 Answers

2000 silverado 4.3L V6 has misfire.check engine light on, code P0300.Check engine light will go out sometimes then come back. Changed plugs,wires,cap,rotor and coil, checked fuel pressure was stable at...


mine does similar , ive changed plugs ,wires,cat convertors,fuel filter,2 dist caps. it has no power up a hill or with the ac on.has even stalled out on me on the interstate going up a hill, light starts fashing . only says a misfire, thought maybe air flow cencor?curious what u find out

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1 Answer

Audi v6 2.8l (AAH) warm misfire at idle


It is necessary to replace rings on pistons.

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