2007 Harley Davidson Softail Heritage Classic Missing and running like garbage
Thread Starter
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Intermediate
Joined: Mar 2022
Posts: 46
Likes: 42
From: Illinois
2007 Harley Davidson Softail Heritage Classic Missing and running like garbage
OK I've read everything I can find on this in this forum. It seems I'm having the same issue as allot of others. Being a new rider I am at a lost of what to do next.
The bike ran great at first, then started a cough, then a miss, and backfire, now hard to start and idol.
I tried to check fuel pressure after $160.00 at O'Reilly and fittings are not there for my bike. I will get it done tomorrow.
for now I can hear the fuel pump it's loud. Sounds like its pumping just loud. I also noticed that gas circulation in the tank when switched to run.
I did the WD 40 thing and checked behind the breather for leaks didnt notice any increase in idol.
Anyone who has been through this please help.
Runs like a scalded dog then looses power, misses, coughs, and backfires. 07 Heritage classic.
i checked for loose wires and ground, checked battery, all good.
The bike ran great at first, then started a cough, then a miss, and backfire, now hard to start and idol.
I tried to check fuel pressure after $160.00 at O'Reilly and fittings are not there for my bike. I will get it done tomorrow.
for now I can hear the fuel pump it's loud. Sounds like its pumping just loud. I also noticed that gas circulation in the tank when switched to run.
I did the WD 40 thing and checked behind the breather for leaks didnt notice any increase in idol.
Anyone who has been through this please help.
Runs like a scalded dog then looses power, misses, coughs, and backfires. 07 Heritage classic.
i checked for loose wires and ground, checked battery, all good.
Thread Starter
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Intermediate
Joined: Mar 2022
Posts: 46
Likes: 42
From: Illinois
Apon further review it seems the manifold gasket is indeed bad. Did the test once more in the daytime light and bam there it was. Motor chokes and almost dies with a spritz of W-d 40 around the left side manifold gasket. Really hope this is the problem.
Seasoned HDF Member
Joined: May 2017
Posts: 5,915
Likes: 5,929
From: NorCal
Could be. I use a lpg bottle with a length of rubber hose on it to check intake leaks. Less messy, works just as well, and allows you to direct the flow exactly where you want it close up. Good luck.
Seasoned HDF Member
Joined: Sep 2008
Posts: 14,165
Likes: 11,255
From: San Diego, CA
A bad intake manifold will cause the issues you have have listed... I believe it will run better when you get the manifold gasket sealed...
When you reinstall the intake manifold, remember to loosely install the manifold/ throttle body assembly. Finger tight only on the bolts. Then install the air cleaner backing plate, with head breather bolts, to properly line up and center the intake/ throttle body assembly. Once centered, snug up the intake bolts, remove the air cleaner backing plate if necessary (usually is), to properly torque (final tighten) the intake bolts..
You do all that to make sure that when everything is put back together, it is not under stress.... if the assembly is stressed, it could cause leaks...
This video is on a carb manifold installation, but is the same principle, just slightly different parts, and what I am referring to starts around 2:15 in the video...
While I think the new manifold seals, properly installed, will solve your problem, I am concerned that you can see fuel swirling around the tank when the ignition is on.
The fuel pump should pressurize the lines, shut off, and hold that pressure until the engine is started... Once started it will turn back on..... The early MM EFI has fuel returning to the tank, but not the Delphi EFI like in your bike. There has been an issue, as the twin cams get older, where a pinhole develops in the fuel line from the fuel pump to the fuel filter, or from the fuel filter to the fitting/check valve in the tank.... When the tank level gets low, you can see fuel squirting across the inside of the tank...
That may be something you need to check out too...
Good luck with your repair...
Seasoned HDF Member
Joined: May 2017
Posts: 5,915
Likes: 5,929
From: NorCal
Considering the recommended book procedure is to replace all those expensive screws on the fuel pump plate, most change out everything inside at once.
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Thread Starter
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Intermediate
Joined: Mar 2022
Posts: 46
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From: Illinois
The next thing after this is to replace the fuel pump and hoses and filter.
Last edited by Paratrooper64; Mar 23, 2022 at 05:20 PM.
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Thread Starter
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Intermediate
Joined: Mar 2022
Posts: 46
Likes: 42
From: Illinois
Well.......that was no Bueno, seems to run a bit better, still has a miss and doesn't want to idol (sometimes), sometimes it will just die with no throttle. Maybe a TPS truly I have no idea. Can't get into the shop until 4 April. I'm really depressed about this as I have only had the bike a little over a week.