Engine troubles Help
Thread Starter
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Cruiser
Joined: Aug 2008
Posts: 171
Likes: 12
Engine troubles Help
I have an 06 Ultra with a fairly new 88 ci engine, less than 6000 miles. I had 550 S&S gear cams installed with high flow air filter, true dual exhaust, race tuner and dine o tuned. It has been running great until Saturday. It started sputtering and popping and running on 1 cylinder like water in the gas. I drained the gas tank and no water. I changed the fuel filter while I had the tank off and changed the spark plugs and checked for loose or worn wires. Nothing worked still sputtering and popping. I don't have any test equipment but I suspect the ECM may have gone bad or maybe a bad injector. Anyone got any ideas? I hate to pay a dealer. Help
Thread Starter
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Cruiser
Joined: Aug 2008
Posts: 171
Likes: 12
Would a bad coil run some and then not because it runs on both cylinders but sputters and pops. With the filter off you can see the fire in the throttle body when it backfires.
Advanced
Joined: Mar 2013
Posts: 60
Likes: 1
From: Virginia
Check to see if it has an intake seal leak. While it is running spray the flanges with WD40 or brake clean and see if it changes the way it is running. Most the time if it is leaking it will kill the motor when you spray it. Sound like a lean pop and the seals will do that.
Jimmy
Jimmy
Road Captain
Joined: Aug 2010
Posts: 702
Likes: 16
From: Zebulon, NC
Pull your oil dipstick.....overfilled?.....smell like gas?
Pull your spark plugs after you have it running......one wet with gas.....the other dry?
Pull your spark plugs after you have it running......one wet with gas.....the other dry?
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Intermediate
Joined: Mar 2011
Posts: 47
Likes: 1
Look in the cam chest
I have an 06 Ultra with a fairly new 88 ci engine, less than 6000 miles. I had 550 S&S gear cams installed with high flow air filter, true dual exhaust, race tuner and dine o tuned. It has been running great until Saturday. It started sputtering and popping and running on 1 cylinder like water in the gas. I drained the gas tank and no water. I changed the fuel filter while I had the tank off and changed the spark plugs and checked for loose or worn wires. Nothing worked still sputtering and popping. I don't have any test equipment but I suspect the ECM may have gone bad or maybe a bad injector. Anyone got any ideas? I hate to pay a dealer. Help
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Thread Starter
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Cruiser
Joined: Aug 2008
Posts: 171
Likes: 12
I would check for an air leak around the manifold as suggested. If that is good, open the cam chest - I've seen some guys install gear drive cams without checking flywheel runout and gear mesh - cost one of my friends a TC88 motor, as half of the gearset ended up though the oil pump before he figured out the issue. Good luck in your search, let us know how you make out.
