CCP Removal & MPG's - related to surging thread

[bdiver]

This is in regards to the 99 RT surging thread.

I removed the CCP, pulled fuse #5 for 15 seconds, blah, blah, blah. The bike runs like brand new and Smooth as ever so my next thought is, what happens to the mileage figures???

I haven't run enough miles yet to determine if this is a good or bad solution to the surging issue however my recent fill up (yesterday) revealed a figure of ~36.x mpg :scratch for that particular tank. Out of the 215 miles on the tank about 135 miles were with the CCP removed and did roughly 170 miles of it on the freeway. Typically my mileage for this type of riding is in the 42 mpg range. I'm not crazy about a ~15% drop in mpg's as this is a daily rider and I expect decent mileage from this bike and will probably run a few tanks through to see what the mpg figures are then make a determination as to reinstall or not.

Did any of you notice a dramatic change in fuel mileage when you removed the CCP? If so, what kind of mileage figures are the rest of you getting with the it removed? Bueller? Bueller?

[TheRoss]

Great question. This past weekend I also pulled the CCP and the #5 fuse etc..... based on the thread I read here. It does run like a different bike! Rear tire is showing cords, but as soon as the new one gets here I'll take a ride of a few hundred miles and check out the mileage.

[bikerfish1100]

your bike is running richer without the CCP. Richer = more fuel per unit of oxygen, which = lower mpg. (this tradeoff has been documented before).

[PGlaves]

your bike is running richer without the CCP. Richer = more fuel per unit of oxygen, which = lower mpg. (this tradeoff has been documented before).

Yes - several times starting back in about 1911 when somebody moved the needle stuck through the cork used for a fuel metering valve. :)

[bmwmick]

Yes - several times starting back in about 1911 when somebody moved the needle stuck through the cork used for a fuel metering valve. :)
You are showing your age Paul. :)

I believe that a CCP removal should be followed by a TPS adjustment. 0.380V between pins 1&4 on the TPS connector(connected), Ignition on, Engine OFF.

MY '96 RT gets 40-45 with normal riding. I've seen 50+ in the higher altitudes.
I pulled my CCP in late 1995.

Mick

[jcridge]

Since you removed the CCP, are you planning on removing the Cat as well?

[bmwmick]

Since you removed the CCP, are you planning on removing the Cat as well?

Me? No, I have not had a CAT since 1995 either. I passed the AZ state emission inspection for 10 years with flying colors too.

[dhgeyer]

I believe that a CCP removal should be followed by a TPS adjustment. 0.380V between pins 1&4 on the TPS connector(connected), Ignition on, Engine OFF.


Mick

For those of us who are very new to all this, could you explain the procedure involved in the above quote in excruciating detail? Thanks!

[cooltomcat]

Did you guys also install the CO2 potentiometer? You can find one at A&S cycle. I installed one, and removed the ccp and my surge problem disappeared, and have not noticed any difference in mpg.

[bmwmick]

For those of us who are very new to all this, could you explain the procedure involved in the above quote in excruciating detail? Thanks!

Lots of good reading here:
http://www.ibmwr.org/r-tech/oilheads/t-screw.shtml
This is only ONE of the many articles.

[JimMoore]

I found that I lost a few mpg when I was doing a lot of in-town riding. On the highway my mpg remained the same.

[keybuster324]

CCP removal ??? is this the canister on uper right side near the seat???

[bikerfish1100]

CCP = Cat Code Plug (relay that talks to O2 sensor- or something like that). Cannister Removal = Cannistererctomy (removal of ugly right side charcoal filter for fuel tank).

[dhgeyer]

bmwmick - Thanks! That is most informative.

[awagnon]

CCP = Cat Code Plug (relay that talks to O2 sensor- or something like that).

Actually it isn't a relay, but just a jumper with a plastic box around it. Removed mine a long time ago and I get 0-3 mpg less depending on riding on the highway or around town. No real difference at highway speeds. It made the surging less, but didn't completely eliminate it.

[aaaaaa]

The Borg are sleeping now.
robert

[dhgeyer]

OK, this is probably a really dumb question, but bear with me. I decided to pull the cat code plug as an experiment. I don't have much of a surging problem, but the engine hiccups occasionally, and I wanted to see if this would be a cure for that as well. I'm not worried about any damage to the cat, since I don't intend to leave the cat code plug out for very long.

Anyway, I did as described above: pulled the cat code plug, then pulled fuse # 5. I assumed this should be done with the engine running. As soon as I pulled the fuse, the bike stopped running. Even the fuel pump died. I suppose that makes sense - no power to the Motronic unit. I waited 20 seconds, and put the fuse back in, and the fuel pump started again and I could start the bike.

So, does one pull the cat code plug while the ignition is on but the engine is not running, or does one do what I did?

By the way, I did a test ride, and the bike definitely ran better. It did hiccup once, though, so that must be some other issue.

[awagnon]

So, does one pull the cat code plug while the ignition is on but the engine is not running, or does one do what I did?

Normally you would pull the plug and then reset the Motronic (pull fuse) with the bike's ignition off. If nothing else, it's safer.

[kgadley01]

I did what Jim moore suggested on my 99 RT. I haven't noticed a difference in fuel mileage yet. But the bike runs great... :bow

[bdiver]

I've run a tank full of fuel through the bike and the gas gage acted like the one on my big block 400. I could see the bars drop like a led zeppelin - it was that bad.

This morning, I left the house with 170 miles on the tank and 2 bars on the fuel gage. Half way to work (12 miles away) down to 1 bar and the fuel light came on. On the way home the final bar disappeared:( I filled up 5.75 gal at 188.5 miles for a 32.8 MPG figure which is the lowest mileage figure I've seen on the bike in about 30K miles.

I decided to put the CCP back in (mine is yellow by the way). I will do another test later when I can do some distance riding, this tank was strictly commuting. When I do another test I'll get back on the thread and share those results.