Question about 1999 Ducati ST 2

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Engine misfiring and lack of power Ducati ST2 944cc

OK, so it started off with occasional back fire especially at low revs. It has steadily got worse with stalling on idle, lack of power. Almost as though only firing on 3 cylinders. I have changed the oil and filter, spark plugs, cleaned and checked the air filter and fuel filter and it is still the same. It is now virtually unridable. Any ideas?

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Check the coil's and the crank sensore

Posted on Jun 04, 2010

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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

1 Answer

Rev meter going crazy


find a real shop, an ASE rated shop and mech.
and bingo. real help, not guessing.
why not stated how the car drives, and forget the tacho.
you have lost power, from the engine, that is the #1 worry here
no year stated either. wow, are you kidding?

key on, CEL lamp glows?
start engine, it goes out, id bet not...
if CEL is stuck on, then scan it, or if older MR2 the jumper wire winkly blinky bs. we read out the flash codes.


lost engine power?
engine stalls?
engine misfires.
engine lacks power, on hills.
engine lacks power wide open throttle?
engine shakes.?
engine bogs
Fuel mileage poor.
others, ?

the tacho if still good, will show wrong if spark is BAD
the tacho uses the spark feed back signal.

no year, no joy. sorry




Jan 30, 2014 | Toyota MR2 Cars & Trucks

2 Answers

Engine misfire low revs


injecter cleaning and new fuel filter.

Sep 27, 2013 | Ducati Monster 620 i.e Motorcycles

1 Answer

Hello, I have a 2004 nissan sentra 1.6L, manual trans with 130K, good shape. Recently it has started to buck occasionally, usually in 2nd or 3rd gear. This became worse yesterday. Plugs are new (months),...


is the check engine light on? o2 sensors will set an engine code as well as set for lean or rich conditions. being a 2004 model if it is an engine misfire condition this also should set an engine code. most likely with the symptoms you have you have a plug wire getting a bad spot in it. as the engine gets hot the plug wire will cause an engine misfire.

Jul 27, 2011 | 2004 Nissan Sentra

1 Answer

I am experiencing power loss from my 2.0tdi 140 A4. seems like massive turbo lag. Started with juddering at low revs in 1st & 2nd gear, then complete loss of power. Starts ok & idles but no pulling...


these vehicles are known for ignition coil failure. typical symptoms include: Misfire, power loss, vibrating engine, poor fuel consumption. If the vehicle's engine vibrates, it be misfiring. Is your chk engine light on???

Sep 29, 2010 | 2006 Audi A4

2 Answers

Sluggish loss of power and popping noises from engine


Clean the distributer cap in the inside, it has water in it thus causing all the noises and the back fire.

Jun 20, 2009 | 1994 Volkswagen Golf

1 Answer

Starts O.K. Lacks pulling power. Will not rev to full power.


check for a clogged exhaust look at catalytic converter it could be stop up.

May 24, 2009 | 1999 Suzuki Vitara

1 Answer

Engine knocking


Hi,
Good news is - I don't think you need a new engine.

As there are many moving parts that could create a knocking sound, it usually needs careful inspection to identify where it is from.
I will give a list of some of the causes and remedies. Yours will probably be one of them, but unless I was there - it could be any.

Loose exhaust component (causes rattles and thumps) - replace parts or joints.
Loose Engine mounts - Engine will move about a lot more than normal - Replacement of mounts.
Fraying Belts - causes continual ticking or slapping - Replace belts and check tension.
Timing is off - bad running, lack of power, pre ignition or knocking at low revs. Check timing belt - Replace, Tune engine.
Cracked valve - slight misfire worse at low revs - Replacement valves.
Clutch Problems - Broken spring or loose bolt - Check clutch plate - replace clutch plates.
Older engines - often accompanying smoke -
Broken Piston ring - continual ticking or occasional misfire - Replace Piston rings
Worn Piston bearings - Piston Slap - Replacement of all piston bearings.

Transmission Problems (only heard when in gear or with clutch out) - Broken gear teeth or worn bearings - Replacement of Transmission or rebuild.

Some of these remedies require engine removal and strip down, others are a simpler fix.

Dec 26, 2008 | 1990 Cadillac Fleetwood

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