does it have a knock sensor?? it could be pulling out alot of timing too.. though i'm not familiar with tbi.... i'm TPIguy not TBIguy <grin> Mike Rolica Plant A Meridian Magnesium Products Strathroy (519)-245-4040 Ext. 265 > -----Original Message----- > From: olbap [SMTP:olbap@mail.mia.bellsouth.net] > Sent: Thursday, May 25, 2000 3:15 PM > To: gmecm@diy-efi.org > Subject: RE: Im going CRAZY, WOT tuning is being a bastard! > Runningoutoffuel > > Mike, > This is exactly what I just did, just disabled closed loop. Havent tested > it > yet. We'll see what happens, if it runs the same at wot all the time and > as > good as that first time yesterday ill be as giddy as a school girl > > > Len, > any reason I should stay down so low on the factory TBI injectors? Ive > searched the archives and seen numerous posts stating that the factory GM > injectors can take alot more than that, something like 70 psi if memory > serves me. > Besides, if i ran these injectors at 13 psi i dont think they would > support > beyond 200 hp. > > > Pablo > > > > > > > > > > > At 02:31 PM 5/25/00 -0400, you wrote: > >I was once at a site that had a lot of info on this subject. > >Also for me in my 165 now 730 tpi in an s15 ecm, had the same problem > while > >going to the track. > >when the car was in limp mode from disconnecting the maf, it ran > consistant > >but slower. When i transfered over to the 730, it too had the same > problem. > >Bruce suggested i disable closed loop and run in open and tune it until > it > >was bang on. > >when forced in open i ran consistant times that were as fast as my first > >times. thru tuning i eventually droped .5 sec of the et. > >now i'm working on closed loop but have not been to the track to test > the > >latest bin.. will be tomorrow though. > >you should also mount a fuel pres guage that you can see while driving > as > >close to the injectors as possible. > > > >my 5cents worth canadian (2 cents american :) > >> -----Original Message----- > >> From: olbap [SMTP:olbap@mail.mia.bellsouth.net] > >> Sent: Thursday, May 25, 2000 12:43 PM > >> To: gmecm@diy-efi.org > >> Subject: Re: Im going CRAZY, WOT tuning is being a bastard! Running > >> outoffuel > >> > >> > >> It runs strongest at about .9v, currently thats dropping down to very > low > >> .8's and high .7s wot.. it runs absolutely horrible too, and im getting > >> pretty bad knock when it happens. > >> > >> The more I think about it the more im starting to think heat is causing > >> it. > >> Not coolant temperature but just some automotive component heat > soaking. > >> The reason I believe this is because the last time I went to the track, > it > >> did the same thing. I issumed it was bad injectors because the track is > >> 150 > >> miles away. I figured the ecm would have learned pretty much all there > was > >> to learn. I ran my fastest time on my first run, each run was > >> progressively > >> slower and slower and when i finally decided to look at my O2 it was > down > >> at > >> .4 - .5 wot at the end of the night! > >> Yes, i have kept copies of each bin as i go and have taken mental > notes. > >> As > >> I said before, i think my part throttle is very close to being right. > >> > >> Pablo > >> > >> > >> > >> > >> > >> At 08:08 AM 5/25/00 EDT, you wrote: > >> >Pablo, > >> >you didn't say what your O2 readings are. When chip tuning, always > >> >take notes, and keep copies of each bin as you go, so you can "go > back". > >> >If you think the ECM's learning curve is fighting you, kill the power > >> >to the ECM and make another test run.. You didn't mention what you > >> >are using to gather data, but I would think the integrator numbers > should > >> >help you tun the fuel... > >> >MV > >> > > >> >> > >> >> I start tuning WOT this morning, friend (or shall i say carbureted > >> arch > >> >> nemesis) comes by, first chip it runs very strong.. lean past 4200 > >> but > >> >very > >> >> strong nonetheless, he thinks i might give him a run finally... > he > >> leaves > >> >> afterwards. > >> >> > >> >> So, I go into my AFR- WOT table.. drop it down some at 4800 > >> >> > >> >> Go for a spin again.. runs much better.. still lean a bit on top > >> >> > >> >> Repeat step two > >> >> > >> >> Go for spin again, seems like maybe (this is a shot inthe dark) > >> perhaps my > >> >> part throttle isnt as good as i thought, on therich side, and the > ecm > >> is > >> >> leaning me out across the board > >> >> > >> >> Ok, ill just keep richening it up till its beyond the scope of > >> adjustment i > >> >> figure (yeah im real half assed about things, i just want it to be > >> fast at > >> >> wot at this point) > >> >> > >> >> Repeat step two.. several times > >> >> > >> >> repeat thepart about me going lean several times.. yet getting > worse > >> >> andworse each time... down to about 3800 rpms its pretty much done. > >> >> > >> >> Ok, time to go crazy, so i start making big changes in the AFR and > FL2 > >> just > >> >> to make it bird killing, rear bumper blackening, plug fouling rich > >> (id > >> >> rather work down than up) > >> >> > >> >> ok, it only makes itBARELY better than what it was > >> >> > >> >> at this point, i think a geo metro can beat me > >> >> > >> >> > >> >> desperate times call for desperate measures so i repeat the bird > >> killing, > >> >> plug fouling step > >> > >------------------------------------------------------------------------- > >> --- > >> >To unsubscribe from gmecm, send "unsubscribe gmecm" (without the > quotes) > >> >in the body of a message (not the subject) to > majordomo@lists.diy-efi.org > >> > > >> > > >> > > >> > >> > -------------------------------------------------------------------------- > >> -- > >> To unsubscribe from gmecm, send "unsubscribe gmecm" (without the > quotes) > >> in the body of a message (not the subject) to > majordomo@lists.diy-efi.org > >Content-Type: application/ms-tnef > > > > >xY>"? > > -------------------------------------------------------------------------- > -- > To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes) > in the body of a message (not the subject) to majordomo@lists.diy-efi.org
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