# B18C Build Troubleshooting **URL:** \ **Category:** PittSpeed Automotive\ **Created:** [April 9, 2008, 5:37am UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698 "2008-04-09T05:37:33Z")\ **Posts on this page:** 20\ **Page:** 4
**Author:** ![kilmer420](https://avatars.discourse-cdn.com/v4/letter/k/d6d6ee/32.png) [@kilmer420](https://forums.speedlife.net/u/kilmer420)\ **Post date:** [April 15, 2008, 7:08am UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/61 "2008-04-15T07:08:56Z")
See if that place in Rochester has a TPS for ya? That cycle - recycler place… ---
**Author:** ![Hycomp](https://avatars.discourse-cdn.com/v4/letter/h/d6d6ee/32.png) [@Hycomp](https://forums.speedlife.net/u/Hycomp)\ **Post date:** [April 15, 2008, 7:34am UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/62 "2008-04-15T07:34:56Z")
> [@help picking an enclosed trailer](https://forums.speedlife.net/t/help-picking-an-enclosed-trailer/35864/17): > > nothing I can do about he bypass holes. Are you 100% positive there are no adjustment screws, that will close off the bypass holes? If they are indeed just a passage from one side of the plates to the other you could just pull off the ITB’s and pack the holes with JB weld and then smooth them off once cured. > [@help picking an enclosed trailer](https://forums.speedlife.net/t/help-picking-an-enclosed-trailer/35864/17): > > Looking at the datalog was alarming. With NO throttle input the TPS signal voltage is all over the place, not steady at all. Ranges from .0V (where is should be) to 1.0V. Sounds like the TPS is shot or else the loose wire problem you reported previously is not correctly fixed. Also, I would be sure to check your input voltage and your output from the TPS with a multimeter to be sure of the values and not some odd problem with your modified ecu set-up. > [@help picking an enclosed trailer](https://forums.speedlife.net/t/help-picking-an-enclosed-trailer/35864/17): > > MAP sensor is seeing no less than 650mBar which is near the bottom right hand corner of the low cam fuel map (way too high for idle). MAP pressure actually starts high and as RPM rises the pressure displayed goes down. Could you please clarify the changes in MAP pressure? Are you seeing more vacuum initially or after a little while when the revs go up? ---
**Author:** ![dyingwish](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dyingwish/32/6041_2.png) [@dyingwish](https://forums.speedlife.net/u/dyingwish)\ **Post date:** [April 15, 2008, 7:45am UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/63 "2008-04-15T07:45:08Z")
> [@hey guess im a newb around here, some pics.](https://forums.speedlife.net/t/hey-guess-im-a-newb-around-here-some-pics/35945/11): > > Are you 100% positive there are no adjustment screws, that will close off the bypass holes? If they are indeed just a passage from one side of the plates to the other you could just pull off the ITB’s and pack the holes with JB weld and then smooth them off once cured. > > Sounds like the TPS is shot or else the loose wire problem you reported previously is not correctly fixed. Also, I would be sure to check your input voltage and your output from the TPS with a multimeter to be sure of the values and not some odd problem with your modified ecu set-up. > > Could you please clarify the changes in MAP pressure? Are you seeing more vacuum initially or after a little while when the revs go up? There are no adjustment screw for bypass allowance, just one that adjust the relative position for each plate. They are all synchronized now and closed 100%. The bypass holes are just a simple plate bypass…they could be JB welded easily. May do that tonight actually. The TPS is getting the proper 5V reference with the key in ON position, signal voltage is stable and correct (.5V closed, 3.5V WOT…values added to RTP calibration map…using MAP for primary load, TPS for seconday load) When the sensor is off of the throttle shaft…it sounds like something is loose inside. It also must be wound relative to the throttle shaft a full 360 degree before it will read anything less than a full 5V. ONce wound it will make a smooth transition in increasing voltage until WOT. THe MAP is seeing MORE vac pressure initially and it goes down as RPM goes up ---
**Author:** ![dyingwish](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dyingwish/32/6041_2.png) [@dyingwish](https://forums.speedlife.net/u/dyingwish)\ **Post date:** [April 15, 2008, 10:40am UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/64 "2008-04-15T10:40:04Z")
Well, after some lengthy discussion with the guy that wrote RTP, we’ve got a few conclusions: 1. The TPS is shot, it should never waver like that. I cannot verify which bike or year the ITB’s are from. They are supposed to be GSXR 1000, but the castings and body dimensions (aside from butterfly size) do not match the registry. Without this TPS I am screwed…it rotates on the throttle shaft in such a way that the Honda one will not work. 2. Those little bypass holes are definately an issue, hence the rising RPM but falling vacuum readings. 3. Apparently the solid CEL means there are NO codes stored…what my datalog was bringing up are ones that are still functional, or not disabled intentionally. I was told to physically disconnect the unit, not just ask it to disconnect when retrieving codes from a datalog session. ---
**Author:** ![kilmer420](https://avatars.discourse-cdn.com/v4/letter/k/d6d6ee/32.png) [@kilmer420](https://forums.speedlife.net/u/kilmer420)\ **Post date:** [April 15, 2008, 12:00pm UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/65 "2008-04-15T12:00:03Z")
> [@Possible business venture... Let Me Fukc your wife...](https://forums.speedlife.net/t/possible-business-venture-let-me-fukc-your-wife/35958/7): > > Well, after some lengthy discussion with the guy that wrote RTP, we’ve got a few conclusions: > > 1. The TPS is shot, it should never waver like that. I cannot verify which bike or year the ITB’s are from. They are supposed to be GSXR 1000, but the castings and body dimensions (aside from butterfly size) do not match the registry. Without this TPS I am screwed…it rotates on the throttle shaft in such a way that the Honda one will not work. > > 2. Those little bypass holes are definately an issue, hence the rising RPM but falling vacuum readings. > > 3. Apparently the solid CEL means there are NO codes stored…what my datalog was bringing up are ones that are still functional, or not disabled intentionally. I was told to physically disconnect the unit, not just ask it to disconnect when retrieving codes from a datalog session. now that makes more sense! I am sure you can bring your tps to cycle-recylcers in rochester and match up the sensor! they are a motorcylce salvage yard…those holes are a funny issue 😉 that’s weird about your datalog system…is it easily accessible at least? ---
**Author:** ![LilGreenB18](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/lilgreenb18/32/3362_2.png) [@LilGreenB18](https://forums.speedlife.net/u/LilGreenB18)\ **Post date:** [April 15, 2008, 1:54pm UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/66 "2008-04-15T13:54:13Z")
> [@kilmer420"](#): > > :weak: was that supposed to be for me? so are you gnna just put the gsr mani and tb on and run it and rebuild the itb’s? ---
**Author:** ![kilmer420](https://avatars.discourse-cdn.com/v4/letter/k/d6d6ee/32.png) [@kilmer420](https://forums.speedlife.net/u/kilmer420)\ **Post date:** [April 15, 2008, 2:50pm UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/67 "2008-04-15T14:50:06Z")
> [@"FIRE" in Cheektowaga](https://forums.speedlife.net/t/fire-in-cheektowaga/35947/12): > > was that supposed to be for me? a. is this your thread? b. are you the one with the itb issues c. you have your answer :bigok: ---
**Author:** ![imported\_gearhead](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/imported_gearhead/32/5957_2.png) [@imported\_gearhead](https://forums.speedlife.net/u/imported_gearhead)\ **Post date:** [April 15, 2008, 3:30pm UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/68 "2008-04-15T15:30:30Z")
im glad to see a little progrees! I like the idea of you swapping for a fresh TPS, like you said before, it shouldnt fluctate like that and is probably toast. I hope you get these working! It would suck to go through all this and just put a plain-ol manifold/tb on it. ---
**Author:** ![dyingwish](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dyingwish/32/6041_2.png) [@dyingwish](https://forums.speedlife.net/u/dyingwish)\ **Post date:** [April 16, 2008, 4:45am UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/69 "2008-04-16T04:45:37Z")
> [@Any suggestions on a new muffler?](https://forums.speedlife.net/t/any-suggestions-on-a-new-muffler/35929/17): > > im glad to see a little progrees! I like the idea of you swapping for a fresh TPS, like you said before, it shouldnt fluctate like that and is probably toast. I hope you get these working! It would suck to go through all this and just put a plain-ol manifold/tb on it. I agree. I took them off last night and started reassembling the stock IM/TB. I’m going to tune it that way and hunt down another sensor and fill in the bypass holes. Switching back and forth is pretty easy. I need it running now, I need to get racing… I haven’t given up, and these will be worked out. ---
**Author:** ![LilGreenB18](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/lilgreenb18/32/3362_2.png) [@LilGreenB18](https://forums.speedlife.net/u/LilGreenB18)\ **Post date:** [April 16, 2008, 6:07am UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/70 "2008-04-16T06:07:49Z")
> [@This makes me sad](https://forums.speedlife.net/t/this-makes-me-sad/35920/4): > > a. is this your thread? > b. are you the one with the itb issues > c. you have your answer > > :bigok: fuck yourself, and then ask yourself the same ?'s all i said was im excited to see it run , steves a friend of mine and i wish him best of luck with getting the itb’s working , i would try to help as much as i can but i dont know jack shit about itb’s ---
**Author:** ![kilmer420](https://avatars.discourse-cdn.com/v4/letter/k/d6d6ee/32.png) [@kilmer420](https://forums.speedlife.net/u/kilmer420)\ **Post date:** [April 16, 2008, 8:06am UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/71 "2008-04-16T08:06:33Z")
> [@Cobraman04 vs. ugososlo](https://forums.speedlife.net/t/cobraman04-vs-ugososlo/35898/26): > > I agree. I took them off last night and started reassembling the stock IM/TB. I’m going to tune it that way and hunt down another sensor and fill in the bypass holes. Switching back and forth is pretty easy. I need it running now, I need to get racing… I haven’t given up, and these will be worked out. Git er done…I wanna go for a ride finally! ---
**Author:** ![tegSimple](https://avatars.discourse-cdn.com/v4/letter/t/d6d6ee/32.png) [@tegSimple](https://forums.speedlife.net/u/tegSimple)\ **Post date:** [April 16, 2008, 8:22am UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/72 "2008-04-16T08:22:57Z")
> [@This makes me sad](https://forums.speedlife.net/t/this-makes-me-sad/35920/4): > > a. is this your thread? > b. are you the one with the itb issues > c. you have your answer > > :bigok: 🤣 > [@Cobraman04 vs. ugososlo](https://forums.speedlife.net/t/cobraman04-vs-ugososlo/35898/30): > > Git er done…I wanna go for a ride finally! hope you have a skinny ass…his seats are not for the horizontally challenged. don’t you worry steven, we’ll get you back up and running. i don’t care who you have to :bj: ---
**Author:** ![tegSimple](https://avatars.discourse-cdn.com/v4/letter/t/d6d6ee/32.png) [@tegSimple](https://forums.speedlife.net/u/tegSimple)\ **Post date:** [April 17, 2008, 9:41am UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/73 "2008-04-17T09:41:29Z")
updates? ---
**Author:** ![dyingwish](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dyingwish/32/6041_2.png) [@dyingwish](https://forums.speedlife.net/u/dyingwish)\ **Post date:** [April 17, 2008, 10:39am UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/74 "2008-04-17T10:39:20Z")
IM is back on, just waiting on TB and IAB gasket to show and I’m on my way. Hopefully. ---
**Author:** ![kilmer420](https://avatars.discourse-cdn.com/v4/letter/k/d6d6ee/32.png) [@kilmer420](https://forums.speedlife.net/u/kilmer420)\ **Post date:** [April 17, 2008, 10:43am UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/75 "2008-04-17T10:43:35Z")
> [@Anyone here Scrap?](https://forums.speedlife.net/t/anyone-here-scrap/35975/11): > > IM is back on, just waiting on TB and IAB gasket to show and I’m on my way. Hopefully. I’ll try and stop down if you get some parts. LMK ---
**Author:** ![tegSimple](https://avatars.discourse-cdn.com/v4/letter/t/d6d6ee/32.png) [@tegSimple](https://forums.speedlife.net/u/tegSimple)\ **Post date:** [April 17, 2008, 11:04am UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/76 "2008-04-17T11:04:23Z")
> [@Anyone here Scrap?](https://forums.speedlife.net/t/anyone-here-scrap/35975/11): > > IM is back on, just waiting on TB and IAB gasket to show and I’m on my way. Hopefully. hopefully these will be here today…racing is sunday ❌ ---
**Author:** ![dyingwish](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dyingwish/32/6041_2.png) [@dyingwish](https://forums.speedlife.net/u/dyingwish)\ **Post date:** [April 20, 2008, 11:06am UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/77 "2008-04-20T11:06:56Z")
IT’S ALIVE!!! Put on the old IM/TB and everything was perfect. :doh: :hsdance: I’ll tune it this week and make next weekends auto-X. Sweet. ---
**Author:** ![kilmer420](https://avatars.discourse-cdn.com/v4/letter/k/d6d6ee/32.png) [@kilmer420](https://forums.speedlife.net/u/kilmer420)\ **Post date:** [April 20, 2008, 4:41pm UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/78 "2008-04-20T16:41:41Z")
> [@Ooh look at me! v."Trash The Dress"](https://forums.speedlife.net/t/ooh-look-at-me-v-trash-the-dress/36033/4): > > IT’S ALIVE!!! > > Put on the old IM/TB and everything was perfect. :doh: :hsdance: > > I’ll tune it this week and make next weekends auto-X. Sweet. Bout damn time 😉 ---
**Author:** ![LilGreenB18](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/lilgreenb18/32/3362_2.png) [@LilGreenB18](https://forums.speedlife.net/u/LilGreenB18)\ **Post date:** [April 20, 2008, 7:31pm UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/79 "2008-04-20T19:31:08Z")
sweet shit, i wqas happy for you when i got your text early this morning ---
**Author:** ![tegSimple](https://avatars.discourse-cdn.com/v4/letter/t/d6d6ee/32.png) [@tegSimple](https://forums.speedlife.net/u/tegSimple)\ **Post date:** [April 22, 2008, 12:19pm UTC](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698/80 "2008-04-22T12:19:27Z")
now all we need is a tuning appointment [Previous page](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698.md?page=3) [Next page](https://forums.speedlife.net/t/b18c-build-troubleshooting/196698.md?page=5)