now im a tbi guy!

[steveo]

a bit of schooling here since this plumbing is a bit foreign to me....

the air pump can go without any ill effects since its mechanical, right?

the stupid heater thingie that runs from the exhaust manifold can go byebye without any ill effects too?

[RobertISaar]

i want to say the calibration is setup for the exhaust manifold intake heater and that removing it will cause issues due to no IAT(or perhaps i'm thinking of the trucks?).

[dave w]

The Camaro should have IAT. I've tuned without the heat riser (heater thingie), and without the air pump (smog pump).

dave w

[buddrow]

So Steveo, is this an automatic car or a stick?

[steveo]

it's a stick

it's pretty limp too, and has hot start issues, an intermittent idle miss, and is lacking power even for an lo3. something definitely needs help.

anyway i dont want to buy the necessary tuning gear yet but i want to ditch the stupid snorkel and heater thing, and all the AIR plumbing, i think i'll chance it and see how it goes..

i cant even clean the engine bay up with all the air pump stuff in the way. it's all gotta go.

this car has had the ecm and prom replaced at some point too, havent' had the chance to dig it out and see what's in there..

[steveo]

man oh man, this late 80s emissions loaded tbi crap is just brutal!

i dont like wrenching on it, and i dont like its design.

makes me want to run screaming back to carbville pretty quick

just out of curiosity, if i just basically chopped the injectors out, would i hit limp mode? or would the ECM still provide spark from the ordinary spark table (while bitching with check engine light obviously)

[steveo]

8063 $4D btw

[steveo]

finally got under there to do some rewiring (had an aftermarket alarm that was half working and screwing stuff up; so i had to rewire a lot of the chassis harness)

pulled the ecm at the same time...

AMYB.

is there a calibration list that'll tell me what the hell that is?

there's evidence of this ECM being opened multiple times...

[RobertISaar]

AMYB
88 F-body
L03 5.0TBI
M39 T5 2.95 trans
3.08 final gear
federal emissions
1228063 ECM
16120674 MEMCAL(PROM?)

[steveo]

i actually just found the bin for it in the old archives. man oh man tuning tbi is going to be weird.

the cal has a really gimpy looking ve table that ends at 3200rpm

i have NO idea where the rest of it is calibrated

is this typical VE for tbi?

[RobertISaar]

that looks slightly odd......

and anywhere above 3200 is taken care of in a VE adder table..... 2D.

[steveo]

what a shitty system.

anyway, it's a stock cal. i need me a chip programmer. and pull valve covers. this thing has had a longblock swapped and i dont think they're tbi swirl ports. it's missing a lot of power. needs ve tuning bad...

[RobertISaar]

yeah, i'm not a fan of 3D + 2D either.... being a C3, i don't really know what you could do about it, short of making it a EBL unit.

[steveo]

yeah i'd sooner repin it for a different tbi ecm.

i think i'll work with what i have.

[steveo]

last night, car was running like crap all of a sudden, bucking, surging, stalling, broke the trans mount and blew a chunk of rusty exhaust pipe off it was running so rough

checked everything basic... egr moved ok.. vac lines ok.. plug wires not burned.. base timing advanced just slightly..

figured i'd break it or fix it for cheap

unplugged the fan so it'd get nice and hot

then dumped 'bout a gallon of a seafoam-like substance down it (which got really frothy, since the injectors were spraying gas everywhere) then redlined it in 1st for a few minutes, hoping it'd either fix it or blow it up so i could convince myself to do an engine swap for something with more balls

it fixed it, runs great now

still a tbi guy

fml