Harley Davidson Forums

stolivar · Oct 21st, 2008, 04:55 AM

all of a sudden my gas milage sucks. down to 30 mpg. used to be around 43.

ride a 04 RG with screaming eagle kit. plugs are black and dry. dies at idle when at stop light.

steve

silentflyer · Oct 21st, 2008, 06:04 AM

How many miles? Air cleaner,plugs? Carb or FI?

artisan · Oct 21st, 2008, 08:29 AM

I'm no expert but it sounds like its running very rich,could be something simple like a blocked air cleaner.

R. Lewis · Oct 21st, 2008, 08:42 AM

Quote: Originally Posted by stolivar View Post

all of a sudden my gas milage sucks. down to 30 mpg. used to be around 43.

ride a 04 RG with screaming eagle kit. plugs are black and dry. dies at idle when at stop light.

steve

The dry part for the plugs is a good thing --the black is kind of questionable.. Sounds lean , what kinda octane you puttin in her? Ever tried any F.I./carb. cleaner in the tank. just a couple of oz's will do.

wildspirit97 · Oct 21st, 2008, 09:14 AM

Sounds like it may be the engine temp. sensor to me. Making the bike think it never warms up and running rich in warm up mode. Have you checked for diagnostic codes?

glider · Oct 21st, 2008, 10:39 AM

Quote: Originally Posted by wildspirit97 View Post

Sounds like it may be the engine temp. sensor to me. Making the bike think it never warms up and running rich in warm up mode. Have you checked for diagnostic codes?

I agree with wildspirit here. The black plugs are telling you that too much fuel is being sent to the engine. Possible cause is the engine temp sensor on the rear of the front cylinder head.

Check for codes.

04-07 HD DTC Codes and Activation - Harley Davidson Community (04-07 HD DTC Codes and Activation)

stolivar · Oct 21st, 2008, 07:00 PM

It just came back from hd. It was on the dyno and they checked it out. They say there is nothing wrong with the bike. the bike is 04 RG, has 30K with EFI, Screaming eagle heads. New plug, no difference. They say everything is in speck.

It did have bad gasgets on the air intake. replaced those (no leaks) also new throttle body on it. the other one had a crack in the shaft.

Put some Cleaner in it tonight.

steve

R. Lewis · Oct 21st, 2008, 07:11 PM

Quote: Originally Posted by stolivar View Post

It just came back from hd. It was on the dyno and they checked it out. They say there is nothing wrong with the bike. the bike is 04 RG, has 30K with EFI, Screaming eagle heads. New plug, no difference. They say everything is in speck.

It did have bad gasgets on the air intake. replaced those (no leaks) also new throttle body on it. the other one had a crack in the shaft.

Put some Cleaner in it tonight.

steve

steve,
Did your scoot throw ANY codes at all??

stolivar · Oct 21st, 2008, 07:16 PM

Just checked the codes none came up but some number did come up after none when I hit the reset

first one PN 105H6025 this was under P
second one none then PN67261-04 under S
third one none then 67459-04 under SP

steve

glider · Oct 21st, 2008, 07:31 PM

They are just part numbers.

Oct 21st, 2008, 06:04 AM	#2
silentflyer Play The Throttle Ride: 2009 Road Glide Join Date: Mar 17th, 2008 Location: Roanoke, Va Posts: 341	Re: low gas milage How many miles? Air cleaner,plugs? Carb or FI?

Oct 21st, 2008, 08:29 AM	#3
artisan Warming The Wheels Ride: 2012 XL1200V Join Date: Apr 28th, 2008 Location: North Yorkshire UK Posts: 85 My Mood:	Re: low gas milage I'm no expert but it sounds like its running very rich,could be something simple like a blocked air cleaner. __________________ ee by 'eck

Oct 21st, 2008, 08:42 AM	#4
R. Lewis Retired Moderators Ride: none Join Date: Nov 3rd, 2007 Posts: 2,265 My Mood:	Re: low gas milage Quote: Originally Posted by stolivar View Post all of a sudden my gas milage sucks. down to 30 mpg. used to be around 43. ride a 04 RG with screaming eagle kit. plugs are black and dry. dies at idle when at stop light. steve The dry part for the plugs is a good thing --the black is kind of questionable.. Sounds lean , what kinda octane you puttin in her? Ever tried any F.I./carb. cleaner in the tank. just a couple of oz's will do.

Oct 21st, 2008, 09:14 AM	#5
wildspirit97 Community Guru Wannabe Ride: 2007 softail fxst Join Date: Sep 12th, 2007 Location: Washington Posts: 1,088 My Mood:	Re: low gas milage Sounds like it may be the engine temp. sensor to me. Making the bike think it never warms up and running rich in warm up mode. Have you checked for diagnostic codes?

Oct 21st, 2008, 10:39 AM	#6
glider Frozen Account Ride: 07 Road King Join Date: Jun 21st, 2007 Posts: 25,999 My Mood:	Re: low gas milage Quote: Originally Posted by wildspirit97 View Post Sounds like it may be the engine temp. sensor to me. Making the bike think it never warms up and running rich in warm up mode. Have you checked for diagnostic codes? I agree with wildspirit here. The black plugs are telling you that too much fuel is being sent to the engine. Possible cause is the engine temp sensor on the rear of the front cylinder head. Check for codes. 04-07 HD DTC Codes and Activation - Harley Davidson Community (04-07 HD DTC Codes and Activation)

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Oct 21st, 2008, 07:00 PM	#7
stolivar New Family Ride: 04 RG screaming eagle kit Join Date: Oct 21st, 2008 Location: missouri Posts: 7	Re: low gas milage It just came back from hd. It was on the dyno and they checked it out. They say there is nothing wrong with the bike. the bike is 04 RG, has 30K with EFI, Screaming eagle heads. New plug, no difference. They say everything is in speck. It did have bad gasgets on the air intake. replaced those (no leaks) also new throttle body on it. the other one had a crack in the shaft. Put some Cleaner in it tonight. steve

Oct 21st, 2008, 07:11 PM	#8
R. Lewis Retired Moderators Ride: none Join Date: Nov 3rd, 2007 Posts: 2,265 My Mood:	Re: low gas milage Quote: Originally Posted by stolivar View Post It just came back from hd. It was on the dyno and they checked it out. They say there is nothing wrong with the bike. the bike is 04 RG, has 30K with EFI, Screaming eagle heads. New plug, no difference. They say everything is in speck. It did have bad gasgets on the air intake. replaced those (no leaks) also new throttle body on it. the other one had a crack in the shaft. Put some Cleaner in it tonight. steve steve, Did your scoot throw ANY codes at all??

Oct 21st, 2008, 07:16 PM	#9
stolivar New Family Ride: 04 RG screaming eagle kit Join Date: Oct 21st, 2008 Location: missouri Posts: 7	Re: low gas milage Just checked the codes none came up but some number did come up after none when I hit the reset first one PN 105H6025 this was under P second one none then PN67261-04 under S third one none then 67459-04 under SP steve

Oct 21st, 2008, 07:31 PM	#10
glider Frozen Account Ride: 07 Road King Join Date: Jun 21st, 2007 Posts: 25,999 My Mood:	Re: low gas milage They are just part numbers.

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