Question about 1986 Buick LeSabre

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Firing order engine seems to be misfiring after a tuneup

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Tray to check coil adjustement
and also spark plug wires
and if engine was opend chk timing

Posted on Oct 07, 2010

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Posted on Jan 02, 2017

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2 Answers

My check engine light flashes when driving or just sitting in park. it will go out when car deccelarates. when flashing the rpm's go up but loses power. Fuel pump/filter? 2007 jeep patriot


This is due to a misfiring engine cylinder, have a fault code test done to determine exactly which cylinder is dead. Do not drive the car this way, it will damage the Catalytic Converter ($500 part) and can cause a fire.

Aug 30, 2016 | Jeep Cars & Trucks

2 Answers

I get s flat spot upon stepping on the accelerator, it is petrol engine and has a carburetor(no its EFI)


it has no CARB,
carbs ended here in 1994

scan the pcm ! first.
it will tell you , the reason.
the errors from the Trottle body or the 4 TPS sensors
2 in TB body motor.
2 under rigth foot
if 1 disagrees, PCM goes to limphome and is weak power.


you can NOT fix or diagnose any modern car
lacking a scan tool.

you cant.
hesitation is misfire
and has over 50 causes.

why would I guess.
I won't'
scan it and tell us the bad news.

these words posted here like over 10,000 times
ever do a search.

Feb 25, 2016 | 2006 Suzuki Forenza

1 Answer

Why does my avensis seem to be "lumpy" and as though its missing. also seems sluggish


that is called misfire.
did you forget tuneup time?
33million hits.
https://www.google.com/webhp?gws_rd=ssl#q=how+to+tune+up+an+engine.

misfire is caused by 50 things.
we tune it up (crossfingers) the if still misfiring, do the test.
ask for list of simple test.

do the 60,000 mile list,in the operators guide.

Jul 04, 2014 | 2007 Toyota avensis 1.6

1 Answer

Why does my vehicle stall when at idle.


Intermittin Engine Stall
Engine No Start
Missfire
MISFIRE IN motor cylinder is more likely the cause to engine stall and hard start.
You will have to fix this problem first,
A misfire, most the time, is caused by, incorrect cylinder firing order (diagram at bottom). Or no or low cylinder compression
no or low compression is the result of A Vacumm leak.
If the timing chain was recently replaced, the valve cover had to be removed, the valve cover gasket could cause a huge vacumm leak which would effect some if not all 6 cylinders,

Symptoms
Lack/loss of power
Hard start
Engine hesitation

For Now
check firing order( coil pack to sparkplug)
check sparkplugs

NISSAN 3.5 V-6 FIRING ORDER
SPARK PLUG GAP 0.050''
SPARK PLUG TORQUE
COIL PACK LAYOUT
3_5-h-dqdssqkoffgbcnef4yme1fk4-1-2.jpg

I hope this helps for now
If you have any questions, you can email or post back
Jtobias1020@gmail.com

Mar 07, 2017 | 2006 Nissan Quest 3.5

3 Answers

I have a 99 ford f150. Sometimes it runs perfect, then out of no where when I try to accelerate it vibrates bad and becomea hesitant. When I came to a stop I switched threw all gears and it seems like it...


This sounds like you might have a bad plug wire or something else in the ignition system is arcing to ground. A quick way to verify this is to run the truck in Park at idle. Next, spray the ignition wires with Windex. You'll notice the truck starting to rough up and might even see the bad wire arcing to ground. A complete tuneup would be recommended in this case.
I hope this helps! :)

Jun 11, 2014 | Cars & Trucks

1 Answer

Miss firing


USA car?
engine runs bad, gross misfiring, and stalls and idle speed all wrong>?
and of course all engines smell of unburned fuel when misfiring..so..
and gross loss of power. from engines. sure that is misfire too.
so lets work MISFIRE
fist what engine is this, sure the HONDA mistake,
its really an Isuzu engine. (abomination car) with USA axles. wow.
2.6L 120 hp (89 kW) I4
3.2L 175 hp (130 kW) V6

which engine, we cant fix engines blind. so...
so i drop to generic answsers...... no eng.
1: ever do the 60,000 mile tuneup,?? if not ?,FAIL she will..
2: are all 4 or 6 spark plugs all firing?into fresh spark plugs>?
3: is compression at or or better than 150PSI? on all cyl.
4: is it flooding?
5: is the check engine light on key on then goes out running?
if the CEL hangs up glowing running then scan the ECU.
scan it and get the DTC error codes.
use any scan tool , (OBD2) plugged into the 16pin DLC connector
near knees.
scan it and find what errors you have, i bet, P030x codes.
those are misfire, x = cylinder that is bad. 0= all.

there is a start.
fuel filter fresh. ? (if found easy near gas tank)




Feb 17, 2014 | 1996 Honda Passport

1 Answer

My 97 Outback has a miss at idle, at upper RPMs it seems to fire on all cylinders. The CEL is flashing. Today when I was driving it lost power on acceleration, limping along. The car never died. Once I...


If the light is flashing it means the engine has a misfire that can damage your catalytic convertor which is very expensive. A tuneup might be in order if its never been done, but I have personally seen many bad timing belts and fuel pumps that have gone bad on those vehicles also.

May 18, 2010 | 1997 Subaru Legacy

1 Answer

My 1999 Intrepid has a Non-cylinder specific misfire. Had tuneup and changed coil packs no help.


In the tune up, did you replace the wires too? Check your firing order also.

Dec 15, 2009 | 1999 Dodge Intrepid

1 Answer

Misfire of cylinder 2 & 5 on 04 Buick LaSabre Custom


Ok this may be something smal that may be simple to fixs; your plugs are in the wrong cylinder?

Check Your gap size .060 (In thousandths of an inch)

Im not sure of the size of engine please look below for your make?

82c1f61.jpg

Fig. 3.8L VIN 1 Engine Firing order: 1-6-5-4-3-2 Distributorless ignition system


756ae24.jpg
Fig. 3.8L VIN K Engine Firing order: 1-6-5-4-3-2 Distributorless ignition system


21520e9.jpg
Fig. 3.8L (VIN 1 and L) Engines Firing order: 1-6-5-4-3-2 Distributorless ignition system
321b2dc.jpg
Fig. 3.8L (VIN K) Engine Firing order: 1-6-5-4-3-2 Distributorless ignition system
I hope that this help!

Jun 08, 2009 | 2004 Buick LeSabre

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