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[JustBill]

Traveling home from Orlando yesterday, running about 80 on the FLA turnpike and the bike starts running on one cylinder and then quits running altogether.  Short story had to get a tow truck to get the rest of the way home.  

Got home and checked the codes and getting P0108 Map Sensor High EFI.  What does this tell me?  Thanks for any help.

[kng103]

Traveling home from Orlando yesterday, running about 80 on the FLA turnpike and the bike starts running on one cylinder and then quits running altogether.  Short story had to get a tow truck to get the rest of the way home.  

Got home and checked the codes and getting P0108 Map Sensor High EFI.  What does this tell me?  Thanks for any help.

i don't know what the error code means, but usually when the cylinders shut down like that it's because they overheated. it is kind of a fail safe so that you won't fry your scoot.
i am suprised that the bike would not run when it cooled down.

[jdracing]

Hi Bill;

Maybe some others will know better, but I don't think there is any more information readily available about what that code means other than what you've listed.  I'd suspect that the MAP sensor has failed, especially reading some of the other codes right around the one your bike has thrown.  

I guess at this point you have two choices:  (1) Take it to the dealer (where they'd probably plug in a new MAP sensor and see if that fixes it or not, and if not, just put it back on the shelf), or (2) bite the bullet and buy a new MAP sensor yourself (saving the labor cost) and try it.  However, on #2, most dealers won't allow return of electrical parts, so if that's not the problem, you're stuck with the part--maybe your dealer will cut you some slack here?

Do you have a friend nearby with an SEEG where you could borrow his MAP sensor to try it before you spend any money?

  

[110tHunDer]

I moved to TC section in hopes of getting more exposure and responses to the topic.

[grc]

Traveling home from Orlando yesterday, running about 80 on the FLA turnpike and the bike starts running on one cylinder and then quits running altogether.  Short story had to get a tow truck to get the rest of the way home.  

Got home and checked the codes and getting [highlight]P0108 Map Sensor High EFI[/highlight].  What does this tell me?  Thanks for any help.

Bill,

P0108 is indeed the fault code for a MAP sensor out of the normal range.  Were there any other codes as well?  A MAP failure should not shut the engine down, it should just set the code and turn on the check engine light (and the engine won't run as well).  You may have multiple codes, or an electrical failure that just happened to set this particular code.  The MAP, TP, and VSS sensors all share a 5 volt reference signal from the ECM, so if that signal is shorted or open you would expect to have codes for all three sensors.

BTW - you can check the MAP with a voltmeter.  With the key on and engine off, you should see between 3.5 and 5.0 volts between the black/white wire and the violet/white wires from the sensor.  With the key on and engine running, the values should be between 1.5 and 3.0 volts.

Jerry

[JustBill]

Bill,
 
P0108 is indeed the fault code for a MAP sensor out of the normal range.  Were there any other codes as well?  A MAP failure should not shut the engine down, it should just set the code and turn on the check engine light (and the engine won't run as well).  You may have multiple codes, or an electrical failure that just happened to set this particular code.  The MAP, TP, and VSS sensors all share a 5 volt reference signal from the ECM, so if that signal is shorted or open you would expect to have codes for all three sensors.
 
BTW - you can check the MAP with a voltmeter.  With the key on and engine off, you should see between 3.5 and 5.0 volts between the black/white wire and the violet/white wires from the sensor.  With the key on and engine running, the values should be between 1.5 and 3.0 volts.
 
Jerry

Jerry,
Got two other codes P1353 Front Cylinder No Combustion EFI and P1356 Rear Cylinder No Combustion EFI.  I was just wondering if the coil was at fault.  

In any case shouldn't this be covered under warranty?

[gocatgoracin]

Hi, I was just reading with interest on the problems you are having, I too am having some problem but nothing as major as yours, just getting an occasional miss/sputter. The question I have is for Jerry, where is he getting info that tells you about the voltage across the MAP sensor? I bought a $60.00 manual that tells me NOTHING along these lines, just how to take things off and put them back on, I am very disapointed in this manual!!! I have a purple 2002 SERK

[Fired00d]

This information (diagnostic code/s) can be found in the Electrical Diagnostic Manual. HD Part # 99497-04 (This is for FLHTCSE)

 [smiley=pumpkin.gif]
Ride Safe,
Fired00d
 [smiley=fireman.gif]

[DCFIREMANN]

Bill,
 
P0108 is indeed the fault code for a MAP sensor out of the normal range.  Were there any other codes as well?  A MAP failure should not shut the engine down, it should just set the code and turn on the check engine light (and the engine won't run as well).  You may have multiple codes, or an electrical failure that just happened to set this particular code.  The MAP, TP, and VSS sensors all share a 5 volt reference signal from the ECM, so if that signal is shorted or open you would expect to have codes for all three sensors.
 
BTW - you can check the MAP with a voltmeter.  With the key on and engine off, you should see between 3.5 and 5.0 volts between the black/white wire and the violet/white wires from the sensor.  With the key on and engine running, the values should be between 1.5 and 3.0 volts.
 
Jerry

Jerry,
Got two other codes P1353 Front Cylinder No Combustion EFI and P1356 Rear Cylinder No Combustion EFI.  I was just wondering if the coil was at fault.  

In any case shouldn't this be covered under warranty?

Check your fuses!!!!!! If the coil does not fire it also sends a code. I did not check but have you done any mods to your bike? But again check your fuses I think you will find your problem. Now if you do find a blown fuse you need to know why it blew. I wish I was in the shop I could almost tell you what fuse.

Be Safe

THE DAWG

[h2oski]

Traveling home from Orlando yesterday, running about 80 on the FLA turnpike and the bike starts running on one cylinder and then quits running altogether.  Short story had to get a tow truck to get the rest of the way home.  

Got home and checked the codes and getting P0108 Map Sensor High EFI.  What does this tell me?  Thanks for any help.

What year and model is your bike.  Starting from the beginning of the 2002 Model Year through sometime towards the end of the 2002 Model Year the screws between the manifold and the throttle body were backing out.  I had it happen on my 02 FLHRSEI.  This only happened on the "Alpha" motors, Touring and Dyna platforms.  Your dealer might goodwill this for you since it was a known problem.

[jfscheck]

Remember - once at speed the bike (even in the Desert at 100+ degrees) as long as you are getting air to the oil cooler - the bike will not overheat...

 [smiley=drink.gif]

[gocatgoracin]

Thanks guys for the info. I am going to find out about a diognostics manual that covers the FLHRSEI, I am going out right now and check my throttle body bolts. Thanks again

[h2oski]

Thanks guys for the info. I am going to find out about a diognostics manual that covers the FLHRSEI, I am going out right now and check my throttle body bolts. Thanks again

I just happenend to have my engine torn down right now so I took some pics of the EFI unit.  I identified the two screws that were the problem.  Your dealer will have a repair kit that has different screws to replace these two.  I think they are longer and a different material.

[gocatgoracin]

Thanks h2, you are great, I assume that my unit will be loose at the manifold if these have worked loose, I am still new to all of this, what is "alpha" how do I tell if my bike is or not? just curious, what does the h2 stand for? thanks again.

[CVOJOE]

[highlight]what does the h2 stand for?[/highlight]  Unless I'm way off it decodes to water ski as in H-two-zero for water.  [smiley=xyxthumbs.gif]

If you have the right service manual, it has a section that will give you nearly all the malfunction codes for your year scooter.

Good luck!

[h2oski]

CVOJOE hit it on the head.  My first passion is water skiing then riding my FLHTCSE is a close second.  

What I would do is remove your horn first.  It has the one acorn nut that holds it on and the wire connection in the back.  Just pull the two wire connectors off the terminal and you have it off.  I would then just take a flashlight and see if you can see if the throttle body and manifold are seperated at all.  

Another easy way to gain access to the efi system is by removing your tank.  It really isn't that hard.  I took a picture of my tank as it is on my bike now.  You can do the same thing with your FLHRSEI.  There are three screws that hold the tank to the frame.  One under the seat, and one on each side at the front of the tank.  Remove the quick connect fuel line that leads to the EFI unit from the tank side.  Then rig up a fuel line plug for the crossover line, see the second picture.  You will need a couple of hose clamps to do this and you will replace the original clamp with a hose clamp for reinstallation.  There is usually a little gas spillage, but nothing too bad.  Now just lift the tank up and flip it 180 degrees and lay it on the battery and rear fender.  Just make sure you put a towel down to protect your fender.  The benefit here of doing it this way is you don't have to disconnect any of the wiring that is in the center console.  Now you have complete access to your EFI unit to see if the screws backed out or broke.  

[h2oski]

And here are the photos of how I plug the fuel crossover.

[h2oski]

I forgot to mention what an Alpha engine is.  With the launch of twin cam there were two engines.  The alpha engine in 1999 is a rubber mounted nonbalanced engine.  It is used on the touring and dyna platforms, althought Dyna has a new engine now that is an upgraded version of the old alpha.  The other engine is a Beta engine launched in 2000.  It is a rigid mounted balanced engine.  There is a seperate balancing system that counteracts the vibration generated by the pistons firing.  It is used exclusively on softails.  

[DCFIREMANN]

For this fix there is no need to remove the tank. Unclip the fuel line feeding the injectors, unbolt the tank, then slide about a 20 inch (long)peice of 2x4 between the tank and the frame. Also when removing the cross over line all you need are 2 vacum line plugs and a pair of vice grips. Clamp the line on either side, remove the other side and plug the fitting. You don't have to do both side but if you want to just remove the line from the other side of the tank and plug that fitting also.

Be Safe

THE DAWG