Stumbling with throttle increase
#1
Stumbling with throttle increase
2010 FLHXXX Trike with a 103 and SE Stage 1 upgrade with Cobra slip-ons, Power Commander V tuner...
Before any modifications, the engine would occasionally stumble and cough with increases in throttle and backfires when down shifting, maybe 75% of the time. There is also a strong gas smell. It still stumbles after the modifications and putting on the PCV but after it stumbles, it pulls real strong. The higher the RPM, the less likely it happens.
Any thoughts on this? Injectors?
Before any modifications, the engine would occasionally stumble and cough with increases in throttle and backfires when down shifting, maybe 75% of the time. There is also a strong gas smell. It still stumbles after the modifications and putting on the PCV but after it stumbles, it pulls real strong. The higher the RPM, the less likely it happens.
Any thoughts on this? Injectors?
Last edited by skinman13; 05-28-2019 at 03:17 PM.
#2
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skinman13 (05-28-2019)
#3
I forgot to mention that there were and are no error codes being thrown...
Update: Found that the PCV was shipped without a MAP installed. Downloaded and installed a base MAP and now it runs 99.9% better, but still has some coughing with quick throttle increases at times...
Update: Found that the PCV was shipped without a MAP installed. Downloaded and installed a base MAP and now it runs 99.9% better, but still has some coughing with quick throttle increases at times...
Last edited by skinman13; 05-29-2019 at 07:36 AM.
#4
Check this out
I forgot to mention that there were and are no error codes being thrown...
Update: Found that the PCV was shipped without a MAP installed. Downloaded and installed a base MAP and now it runs 99.9% better, but still has some coughing with quick throttle increases at times...
Update: Found that the PCV was shipped without a MAP installed. Downloaded and installed a base MAP and now it runs 99.9% better, but still has some coughing with quick throttle increases at times...
you may need to increase the accel pump ...
good luck...
https://www.hdforums.com/forum/sport...l#post18267672
The following users liked this post:
skinman13 (06-08-2019)
#5
UPDATE: My friend gave up and took it to Republic in Stafford Tx...Tech found broken wire to the cylinder head temp plug and the front O2 sensor bad. He says that his Trike runs like he thinks a 103 Stage 1 should run now. I didn't ask him how much it costs...
...still doesn't explain no codes...
Thanks for all the suggestions...
...still doesn't explain no codes...
Thanks for all the suggestions...
Last edited by skinman13; 06-08-2019 at 11:06 AM.
#6
UPDATE: My friend gave up and took it to Republic in Stafford Tx...Tech found broken wire to the cylinder head temp plug and the front O2 sensor bad. He says that his Trike runs like he thinks a 103 Stage 1 should run now. I didn't ask him how much it costs...
...still doesn't explain no codes...
Thanks for all the suggestions...
...still doesn't explain no codes...
Thanks for all the suggestions...
#7
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