Backfires through intake and exhaust
#1
Backfires through intake and exhaust
Hi everybody. I have a 98 heritage springer that I bought 6 months ago. It's been hard to start since I bought it, backfiring through the air cleaner and out the tailpipe. It's now gotten to the point where it won't run and just backfires. I'm an auto mechanic and in my line of work it would be an ignition timing issue, but I know Harleys are a whole other world. I wonder if the ignition module, which is a crane fireball hi4e, is advancing the timing like it's at 2500 rpm all the time. I read about pushrods being out of adjustment and causing this issue, but I pulled the covers down, set the cam off the loved and I can rotate them with my fingers and they have no free play. Any ideas?
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rnrobert (10-11-2017)
#2
The older Crane ignitions have had a nasty reputation over the years of going sour.
We use/stock Dyna 2000i's, when we encounter that scenario,(no spark) if in fact that is the problem.
Scott
We use/stock Dyna 2000i's, when we encounter that scenario,(no spark) if in fact that is the problem.
Scott
__________________
HILLSIDE MOTORCYCLE & MACHINE, INC.
HARLEY-DAVIDSON SPEED & SERVICE CENTER
5225 SOUTH MAIN ST., MUNNSVILLE, N.Y. 13409
Sales/Support 315-495-6650
www.hillsidecycle.com
Walk-in Retail Showroom
Complete H-D Machine Shop
Case & cylinder boring
Complete Cylinder Head Shop
High-Performance Engine Kits
Crank Rebuilding
Direct Link & PowerVision Tuning
Goodson HD Tooling Manufacturer
Maxton Mile World Record
4500 sq ft. facility
OVER 35 YEARS OF H-D ENGINE BUILDING.
See us on Facebook.
HILLSIDE MOTORCYCLE & MACHINE, INC.
HARLEY-DAVIDSON SPEED & SERVICE CENTER
5225 SOUTH MAIN ST., MUNNSVILLE, N.Y. 13409
Sales/Support 315-495-6650
www.hillsidecycle.com
Walk-in Retail Showroom
Complete H-D Machine Shop
Case & cylinder boring
Complete Cylinder Head Shop
High-Performance Engine Kits
Crank Rebuilding
Direct Link & PowerVision Tuning
Goodson HD Tooling Manufacturer
Maxton Mile World Record
4500 sq ft. facility
OVER 35 YEARS OF H-D ENGINE BUILDING.
See us on Facebook.
The following users liked this post:
rnrobert (10-11-2017)
#4
Probably has an intake manifold leak.. Spray some brake clean around the flanges that connect the manifold to the heads. See if idle changes. Check carb to manifold. Check to make sure the petcock vacuum line will hold a vacuum. Same with voes switch line. I would look for exhaust leaks..
The following users liked this post:
rnrobert (10-11-2017)
#5
Probably has an intake manifold leak.. Spray some brake clean around the flanges that connect the manifold to the heads. See if idle changes. Check carb to manifold. Check to make sure the petcock vacuum line will hold a vacuum. Same with voes switch line. I would look for exhaust leaks..
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#8
Hi everybody. I have a 98 heritage springer that I bought 6 months ago. It's been hard to start since I bought it, backfiring through the air cleaner and out the tailpipe. It's now gotten to the point where it won't run and just backfires. I'm an auto mechanic and in my line of work it would be an ignition timing issue, but I know Harleys are a whole other world. I wonder if the ignition module, which is a crane fireball hi4e, is advancing the timing like it's at 2500 rpm all the time. I read about pushrods being out of adjustment and causing this issue, but I pulled the covers down, set the cam off the loved and I can rotate them with my fingers and they have no free play. Any ideas?
#9
i might be that your carb needs to be diss-assembled and cleaned,,,,,the slow/pilot jet affects idle,,,if it's plugged or partially blocked,,it wont start and run correctly. take it apart and clean it like you would a car carb and blow the passages with compressed air. then try it out with nice plugs.
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