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Backfires harley I have a 2002 Ultra Classic EFI that backfires and periodically sputters at low RPM. What is the cause and the solution to this problem?

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  • 23 Answers

There is a throttle position ..cylinder behind the air cleaner...you can adjust it out ,,but if the idle stays up to high it may be bad,,type it on the internet and you,ll find a picture and how to adjust it,,last one I played with was bad and needed to be replaced but I spent 2 days trying to adjust it before I gave in to buy one

Posted on May 11, 2013

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

roadrunning1
  • 152 Answers

SOURCE: 2002 Harley Ultra Classic backfires

Sounds like the previous owner didn't get the cpu remapped, Take it to a Harley dealer and have him check the exhaust mapping on the cpu, Shouldn't cost much or if you want get them to fully service it so that way you will know were your at with it and will have a reference point to start with or service and maintenance reasons (and re-sale value) Hope this helps

Posted on May 18, 2009

tundrajet
  • 80 Answers

SOURCE: removing harley davidson ultra classic gas tank

Drain the fuel either by siphening or removing the cross over tube at the front of the tank and letting it drain that way or just block off those cross over lines and leave the fule in the tank for removal.

0) remove seat
1) drain fuel
2) undo cross over line (bottom front of gas tank.
3) shut off pet **** and remove fuel line from pet ****.
4)there should only be 2 bolts holding the tank on, one at the top front of the tank and one at the back of the tank.

All in all a pretty easy (but possibloy messy) job.

Posted on Jun 06, 2009

  • 69 Answers

SOURCE: 2002 harley davidson ultra classic setting the clock

Turn the Bike on and the Radio off and then follow the buttons on the screen. Most people think you have to do it while it is running and this does not work

Posted on Jun 28, 2009

czaa
  • 4514 Answers

SOURCE: 2002 harley davidson electra glide ultra glide classic will not start

test batt--must be at 12.6 v for proper fire--mite hav a bad one or alternator is failin------get a book on maintenance details

Posted on Apr 13, 2012

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2002 h-d softail spits@back fires at low rpms


Hi Anonymous, and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition or leaking.
3. Spark plug gap to close or to wide.
4. Faulty ignition coil, module and or sensor.
5. Battery nearly discharged.
6. Damaged wire or loose connections at battery terminals,
ignition coil, or plug between ignition sensor and module.
7. Intermittent short circuit due to damaged wire insulation.
8. Water or dirt in fuel system, carburetor or filter.
9. Fuel tank vent system plugged or carburetor vent line closed off.
10. Carburetor controls misadjusted.
11. Damaged carburetor.
12. Loose or dirty ignition module connector at crankcase.
13. Faulty MAP, CKP, and or CMP sensors.
14. Incorrect valve timing.
15. Weak or broken valve springs.
16. Damage intake or exhaust vale.
For a prime suspect please visit website below and good luck:
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My 2002 electra glide standard is sputtering at 3000 rpm while in gear. If i pull the clutch in the sputtering stops until I let out the clutch. I have cleaned the bowl of the carb, replaced the plugs.


Hi Matthew, and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition or leaking.
3. Spark plug gap to close or to wide.
4. Faulty ignition coil, module and or sensor.
5. Battery nearly discharged.
6. Damaged wire or loose connections at battery terminals especially the ground cable at BOTH ends, ignition coil, or plug between ignition sensor and module.
7. Intermittent short circuit due to damaged wire insulation.
8. Water or dirt in fuel system, carburetor or filter.
9. Fuel tank vent system plugged or carburetor vent line closed off.
10. Carburetor controls misadjusted.
11. Damaged carburetor or intake seals.
12. Loose or dirty ignition module connector at crankcase.
13. Faulty MAP, CKP, and or CMP sensors.
14. Incorrect valve timing.
15. Weak or broken valve springs.
16. Damage intake or exhaust valve.
For a prime suspect please visit website below and good luck:
Big Twin Carb EFI DTC Intructions codes Harley Davidson Forums Harley...

Sep 11, 2012 | 2002 Harley Davidson FLHTCUI Electra Glide...

1 Answer

2002 harley davidson electra glide ultra glide classic will not start


test batt--must be at 12.6 v for proper fire--mite hav a bad one or alternator is failin------get a book on maintenance details

Apr 13, 2012 | 2002 Harley Davidson FLHTCUI Electra Glide...

1 Answer

I have a 2001 Ultra Classic. When i go to start it it wants to backfire really bad and when it does start the rpm gauge wont work, but sometimes you can turn the switch off and back on and start it an


Hi Parker1973, and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition or leaking.
3. Spark plug gap to close or to wide.
4. Faulty ignition coil, module and or sensor.
5. Battery nearly discharged.
6. Damaged wire or loose connections at battery terminals especially the ground cable at BOTH ends, ignition coil, or plug between ignition sensor and module.
7. Intermittent short circuit due to damaged wire insulation.
8. Water or dirt in fuel system, carburetor or filter.
9. Fuel tank vent system plugged or carburetor vent line closed off.
10. Carburetor controls misadjusted.
11. Damaged carburetor or intake seals.
12. Loose or dirty ignition module connector at crankcase.
13. Faulty MAP, CKP, and or CMP sensors.
14. Incorrect valve timing.
15. Weak or broken valve springs.
16. Damage intake or exhaust valve.
For a prime suspect please visit website below and good luck:
Big Twin Carb EFI DTC Intructions codes Harley Davidson Forums Harley...

Mar 11, 2012 | 2001 Harley Davidson FLHTCUI Electra Glide...

1 Answer

CHECK ENGINE COMES ON AND SPEEDO DROPS TO 0


Hi Dale, for more information about your question please visit the websites below. Good luck and have nice day.
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1 Answer

2002 Harley Ultra Classic backfires


Sounds like the previous owner didn't get the cpu remapped, Take it to a Harley dealer and have him check the exhaust mapping on the cpu, Shouldn't cost much or if you want get them to fully service it so that way you will know were your at with it and will have a reference point to start with or service and maintenance reasons (and re-sale value) Hope this helps

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