[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: Im going CRAZY, WOT tuning is being a bastard! Runningoutoffuel
Yeah, timing isnt the problem, ive burned a chip with 0 spark retard..
though i do get an occasional 43 when it does go lean and goes into
precautionary retard.
lemme get off my rear and take it for a spin or two with closed loop disabled.
Pablo
At 04:06 PM 5/25/00 -0400, you wrote:
>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
>Content-Type: application/ms-tnef
>
>x?>" ?
----------------------------------------------------------------------------
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