Question about 2004 Buell Lightning XB9S

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Injector problem/computer my buell is running on one clyinder. It runs good when its cold then it throughs a fuel code but it floods out the front cylinder i put new injectors in and coil race ecm then switched back to stock trying to figure out the problem and cant any idea? senor maybe even though it isnt throughing a sensor code?

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Try to to install a new head temp sensor.

Posted on Nov 10, 2008

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4 Answers

How do I tell if I have a bad fuel injector on a 2008 Harley Davidson sportster 1200 xl c.


poor performance , flooding, low fuel pressure, misfiring and hard starting
all would indicate an injector problem but all are not necessary an injector fault
have the fault codes read as the problem may be electronic

May 03, 2015 | Harley Davidson Motorcycles

2 Answers

Injector sprays too much fuel after starting. Engine floods out


Suspect (potentially) either a stuck injector, or a failed/failing fuel pressure regulator. One sign of a failed fuel pressure regulator can be gas in the oil. (I suffered that side effect, along with bogging, and black smoke rich running, worsening as warmed up, turned out to be fuel pressure regulator). If the injector is loose in the throttle body, or has bad o-rings, can also cause some wonky behavior. Good luck.

Mar 14, 2015 | 1992 Geo Tracker

1 Answer

When its very cold outside my 2003 corolla will not start just changed plugs and temp senser we can put a heat light at the firewall by the temp senser for 30 min or so and she will usally fire.


wow, no engine option stated, !!!

how cold is cold, we dont know, ALASKA -50F or Keywest at +80F

what temp sensors , there can be many.

my 08 has 3 on engine,. one in tranny, and 1 in front corner for my outside airtemp option with compass.



the one that counts is the ECT, and this sensos is screwed deep

into the waterjacket or in the thermostat housing, vastly hard to heat up by hand that. for sure heating up the thermal mass of and engine

with a heat lamp is near impossible. so where is it. EXACTLY.



are you running old fuel.?

running summer fuel?

Is CEL (MIL) lamp glowing when it does run?????





hard cold starts are caused by many things.

Just too cold is one (spend time in alaska and see)

Weak spark, check it at each

you connect scan tool, early in the morn. and see if the ECT and IAT

read near the same and near outdoor (where car is parked) temperature. if yes, he ECT and IAT are working.

once started the ECT will rise to 180F or more and hOLD; does it?

if in fact you did by change warm the ECT artifically and start easy

that means the engine is flooding.

my guess is you didnt do diagnosis at bad start time.

(spark tips soaking with fuel) leaking injectors on one or more cyl?

check all sparks for flooding, not just one,

if it is flooded, the operators guide says (RTM) top crank with the throttle held open and this cuts fuel and flood engine starts.

other causes aplenty

too high fuel pressure

leaking injectors

weak spark at any cylinder, got P030x DTC codes from scan tool?

weak compression on any cyl. (sticking valves? cold) (gage it)

if the engine is good, good compression that leaves 2 more.

weak spark (if all spark plugs are strong cranking) then....

or bad fueling,



bad fueling can be.

bad fuel

leaking injectors, (for 3 reasons)

ECU is overfueling, (ECT reads way too low than reality)

The engine has 2 more sensors that can cause over or under fueling

THE MAP or MAF, you didnt say which engine so cant guess.



MAP vacuum port clogged with PCV cloud of death , gunk,.

MAF hot wire coked up, clean it.

the maf coked will cause lean starts.

the mAP can fail 2 ways, stuck at high or low pressure.

stuck high is way more common, this causes flooding.

there are other reasons.



1: EGR main stuck open ( bad news. it floods the intake with exhaust gases and that really wrecks combution to start any engine.

2: ISC stuck closed, (flooding)



or a MAF based engine with any form of induction leaks (vacuum leaks)



i think i hit them all (hope), and there are tests for each case.

ask.

Feb 06, 2014 | 2003 Toyota Corolla

1 Answer

1994 chevy suburban help


It could be low fuel pressure from a weak pump. A fuel pressure test would find out. When the engine is cold, the computer keeps the injectors open longer-a cold engine needs more gas to run than a warm one. When at normal operating temperature, the computer matches the gas to the incoming air. If you have low fuel pressure against the injectors, that is when you would notice the hesitation. A possibility anyway.
If fuel pressure is good, check for trouble codes. A sensor may be sending the wrong information. Could be the mass air flow sensor-the one that tells the computer how much air is coming in so it can match the right amount of gas for it-through the injector on-time. There it is, your injector pulse width is too narrow. Causes lean running, stumbling, hesitation. Another possibility. Check for codes first.
If not air or gas related (is your air filter clean? And the gas filter been changed in the last 2 or 3 years?), and no codes, and fuel pressure is good, you may have to keep looking for an electrical fault. If it runs good when cold, doesn't seem likely to be a mechanical fault.

May 23, 2013 | Cars & Trucks

1 Answer

1989 mpv mazda does not start on cold mornings and days


I'm assuming the engine cranks with the starter but does not start and run.

check the operation of the cold start injector. This is a separate fuel injector that injects fuel into the intake manifold to help richen up the mixture for cold starts. It operates on a timer that is linked to a sensor that measures engine coolant temperature. Once warm or the timer runs out, the cold start injector is turned off. Other things to check:

Fuel pressure too high (floods engine through cold start injector), engine coolant temp sensor or intake air temp sensor is stuck at full hot (doesn't allow enough fuel for cold starts), fuel injectors are leaking (floods engine with fuel).

Feb 10, 2011 | 1989 Mazda MPV

1 Answer

94 subaru legacy wagon will start and run for a few seconds if the fuel pump is disconnected but won't start at all when reconneced.


Check for a very dirty air filter or an obstruction in the air intake. (Engine not getting enough air so mixture is too rich.) Check for fuel pressure to be correct and not too high with the pump running. If it is too high, check that the fuel pressure regulator is working.

Try this: connect the fuel pump but disconnect the cold start fuel injector. If you can get it to start and run, then fuel pressure being too high is most likely. When the cold start injector turns on, the extra pressure is causing more fuel to flow through the injector than normal and the engine floods out.

Feb 09, 2011 | 1994 Subaru Legacy Outdoor

2 Answers

1999 x1 lightning 118/250 runs on 1 cylinder


I have a 99 X1 #170/250 it does same thing when its cold. I put the buell race module still does it took it in and had motor turn apart and found nothing bike runs great when its warm you need to let it warm up it should start to fire

Mar 03, 2010 | 2000 Buell X1 lightning

2 Answers

87 chevy 350 fuel injected pickup wont run smoothly. Will start fine when cold and run for a few minutes then will be rough idle before finally quitting. I have replaced the distrubuter, coil, plugs, plug...


sounds like your egr valve is gummed up or bad. this is located behind the throttle body and has a single vaccum tube connected to it. if the diafram is still good you can remove it and clean it with WD 40 until the plunger works smooth

Nov 08, 2009 | 1987 Chevrolet S-10 Pickup

2 Answers

WON'T START AFTER RUNNING FINE - STARTS FINE WHEN COLD THEN AFTER RUNNING AWHILE , IF YOU TURN IT OFF - ACTS LIKE IT'S GETTING NO GAS - HAVE NEW FUEL PUMP AND FILTER -


I have the 1999 suburban, and my mechanic says that the injectors are worn, and that when you shut off the engine, fuel pressure continues briefly and the injectors "leak" a bit, flooding the engine briefly. That's why after they still start right up after a few minutes, i.e., not enough time to flood, or they start up cold, having drained any of the fuel out of the injectors. Park for a couple hours, and you've got a mildly flooded engine. Replacing the injectors is what he suggested, but that is pricey. Not sure if this is the answer or not, but it's what I've been told. Good luck!

Jul 18, 2009 | 1999 GMC Suburban

3 Answers

Buell Lightning sat for 3 months and now it wont start


add some lucas fuel injector cleaner to the gas in the tank. also i would pull the injectors out and use a spray cleaner on them

Jan 08, 2009 | 2008 Buell Lightning Long XB12Ss

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