thoughts on the subject

[TONYT]

i,m still running very rich,
351w
afr185
comp hr274
vic jr setup efi
accufab 80mm t/b
19lb inj
stock mass air
fuel pressure 39 vac off
the only codes it shows are 31and85 egr and vac cani. which are both gone
it will idle for awhile at 13.5-14 afr,but then will take a dump to full rich on the air/fuel meter,just trying to get it back to base stock and run somewhat lean,not this lean

ANY IDEAS WOULD HELP

[blown96cobra]

Something in the wiring harness is boogered up. I'd look at maf harness. It say if u data logged it the maf counts are super high.

[JIMS SVT]

Bad Wideband sensor?

[Buckeye]

bad o2 or coolant temp sensor

[TONYT]

put in a new coolant temp sensor,and pulled the pvc from the valve cover,and replaced it with a breather,and she's gone from running toooooooooo rich to lean,hoping this is a result of not having enuf inj. in the combo,but for right now its not fat,ran it 3 or 4 diff. times and it would run lean after about 2-3 min.

[blown96cobra]

try and switch out to a set of 24s or 30s and a diff meter.

[facemelter71]

Whats to rich or to lean?

When it goes really lean,whats it reading on the meter?

When its running really rich,what's it read on the meter?

[TONYT]

full rich and full lean
just lays in the corner of the meter each way

[SCHMUCKINGHAM]

Oh god please dont tell me your using a light show A/F gauge

[blown96cobra]

Yea that's a narrowband and it won't help u at all. Go pick up an innovate wideband or an aem wideband.

[TONYT]

it is an aem

[TONYT]

its the digital one with the bosch sensor

[Buckeye]

unplug sensors one at a time till you find change... If none change it may be a ecu. Or if you can take it to your tuner and have them hook the computer to it and check all the inputs from the sensors

Also what is the MAF calibrated for?

[TONYT]

i think we are now on the right track
good ecu
and the rich condition is gone for now,going to put the 42lbs,and the sct2600 back on this weekend,with the base tune i have thats written for those and see what happens,let me see if i can be more clear also,it was extremly rich for the last year period,and now that seems to be gone with the elimination of the pcv from the valve cover,and hooking back up the temp sending unit from the factory harness to the stock meter(had it run directly to a autometer).like i say now she will idle fine for a few min. and then the a/f meter will show a full lean condition,hoping its just the 19lb not being able to keep her fed,,,,,,oh yea buckeye the maf is orig. stock peice to match the stock19lb inj. going to double check my grounds also,is there such a thing as tooo much ground

[full force]

I think 42's are way too much, 24's would be plenty for that combo..

[facemelter71]

As long as you have a good tuner,size of the injectors can be compensated for. I would say that the original temp sensor not being hooked up correctly has alot to do with it.

[full force]

As long as you have a good tuner,size of the injectors can be compensated for. I would say that the original temp sensor not being hooked up correctly has alot to do with it.

true, but why use 30-42 lb injectors either way...no reason for it... 24's will easily do 400-450 hp all day N/A

lose driveability with huge injectors on the street...

[red srides]

do u have it tuned for 42

[Goober]

true, but why use 30-42 lb injectors either way...no reason for it... 24's will easily do 400-450 hp all day N/A

lose driveability with huge injectors on the street...

Whats PSI and duty cycle on those 24's? Why stress a 24 beyond its limt when you can have a 42 do it, and still atomize, with ease.

And I know of several n/a rides that run 42's on the street with no problem.

[facemelter71]

I know of one ride that runs a 331 N/A with 60 pounders on it,and its daily driven. Runs perfectly fine. 400-450 wheel, I would not want 24's in there.

[full force]

Whats PSI and duty cycle on those 24's? Why stress a 24 beyond its limt when you can have a 42 do it, and still atomize, with ease.

And I know of several n/a rides that run 42's on the street with no problem.

to be hionest it was years ago, I now go for carbs to make fast cars... much cheaper and I can tune myself.. I cant remember num,bers but the dyno at the time showed me everything was fine, I am not trying to start argument, just saying the 24 would be fine and save the money of custom tuning, i guess I am budget guy thats all... like to go fast cheap... very cheap I never smoked an engine yet, besides my boat... thats another story... LOL

[NXcoupe]

It's supercharged, or will be soon. I think that's why he's running the larger injectors. Hopefully he'll chime in here and let everyone know.

[TONYT]

my bad, yea the coolant temp sensor has got things on the right track,even took it out on the street,just around the block,i have a base program for the 42's on my sct chip,and they were there because i have a procharger on it not hooked now tho,but the input from here as always helped to get me straightend out,now my delima is whether or not to pull it and swap in the stroker

[TONYT]

got to do a compression test on it tho

what would you all think might be an average comp.# for a 9.2.1 engine,and i mean an average across all cylinders,and its a 351

[87Pro5.0]

You should be fine with 42lb i just got some 30lb injectors but might be getting some 42 lb my self to work with that on3 kit

[NXcoupe]

You should be fine with 42lb i just got some 30lb injectors but might be getting some 42 lb my self to work with that on3 kit

42's are a good start for an on3 kit. If you go higher in hp there is always a set of 60's out there for sale.

Tony, 42's should be fine to get it tuned and running so you can drive it. Then look for some 60's later so you can crank it up.

I'd stay with what you have and get used to it, then move up later. jmho.