1987ZTPI

I hooked up my OTC 4000E scanner and did some live data runs and under normal cruise and mild acceleration she is fine blms stay between 124 and 130. same with the integer. at WOT it says it's picking up a signal from the knock sensor and says the knock signal retard is 15, i'm not real familiar with understandinf this stuff but when it says knock retard is 15 the total spark adv goes from 38deg to about 29-30deg, so i kno it's pulling timing but why only at WOT. at WOT blms and integer are both dead on 128 all the time. I think it says cell 12 or 13, inj pulse width is around 2.6-3ms. I am running 19lb ford injectors and fuel pressure is set at 45 at idle and 53psi at WOT i tested it under full load and pressure stays at 53psi. I have a walbro f/p i believe i have enough fuel flow but am i overflowing my injectors, are they running statically open. The prom was burned for 19lb injectors and some timing changes. the motor is a mild 305 lt1 cam ported heads and intake setup, compression is around 9.4-9.6:1. I am running 90 octane fuel, i havn't tried 93 but i don't feel i need it. base timing is set at 8deg adv, would lowering it to the factory 6deg help at all. Saldy i have no clue wht the knock counts are. She gets awsome fuel economy i avaerage 400km about 245miles to a tank city driving and about 700km 430miles to a tank highway, but i can feel it loose some power on WOT runs. Also the COOLANT TEMP never reaches above 168f and intake air temp stays between 63-72deg F. Any input is welcome thanks guys

1987ZTPI

Anyone anywhere, Help. I have also been having some issues at wot now where the afr readings are well not even there and knock is worse then befor. pump is new but is getting louder, tested for flow and restrictions, and i'm running 19lb ford injectors at 54psi at wot. I ohmed all injectors and all ar a perfect 16.4 ohms. Am i outflowing these injectors? i estimate 300fwhp

WASyL

i'm haveing similar problem but my car is overheating and i cant find any solution. remember that ford rates their injectors at 43 psi not 39 psi like GM so when changing inj. const. jou should put somewhere around 21-22

best regards

morf33

can you send a recorded session of what you are experiencing if you do a snapshot we can help you more. if you have any dataloging or tech one.

1987ZTPI

well the reall shitty part is i was out last week and tried to do some data logging but wasn't able to capture the data and at the same time a nice POS RCMP officer saw me do a wot pull and gave me a 240$ ticket i had the computer plugged in instead of my radar detector. I kno my own stupid ****ing fault but WTF cares out in the country with almost nobody around. But i can remember damn near all the data on the screen.

blm locks at 128
knock retard says around 18-22
total timing says 38-40 advance. with knock occuring
i believe 02 cross counts were 2-3
injector pulse width was around 6.5-7.5
IAT WAS ABOUT 75 deg
coolant temp was 168 deg
O2 sensor voltage was fluctuating normally from what i can see
TPS and IAC all seem to be within specs.

if you need any other specs ler me kno, i'd like some more clues to what this could be fbefor i swap for 21lb injectors.

morf33

first off the bin needs to have the injector setting change in the prom also could you tell me more is the cam stock lt1 cam whats about your short and long trim while running?
set you timing to factory 6deg and start from there get back to a somewhat basic and see how it reacts log the data and see how it is then let me know

morf33

lmao in the country and a cop pops you lmao thats is so funny sorry mate just is i been the country pleanty of times and the one time i needed to book it to meet some bud for a fishing trip i got busted. i actually told the cop when he asked me why . i told him and he gave me a warning.

1987ZTPI

ya god damn pigs have nothing better to do. but the prom is programmed for the ford injectors. it's not a stock prom. I'm not really familiar with all of this stuff yet, and my otc 4000 scanner wont datalog for some reason. but it is a stock lt1 cam with 1.52 roller rockers. higher compression, headers, and some mild porting. when i backed the timing off to the factory 6deg the detonation got worse and that is with 94 octane fuel. So it was actually better with the 90 octane. I'm really confused.

1987ZTPI

I also backed off the knock sensor and torqued it down to 8ft,lbs just incase it was too tight and giving me false readings.

WASyL

my one does the same thing with WinALDL, reason is that you have some wick ground or when alternator gets warm it stops to work properly, chcek that

best regards

1987ZTPI

i've got about 3 small grounds then 1 2guage bolted to the alt braket. so i don't think that is the problem, but these cars have shitty electrical systems anyway, but even if the car is still warming up and i try to datalog it wont record for some reason. it says the information is non compatible. How did you solve your issue?

WASyL

actually i havn't, my was datalogging normally and one day it stopped, now i'm waiting for new engine harness and checking whole interior wiring, plaing to change all senders and sensors + battery and alternator and than i'll see if any problem will occur

regards

morf33

actually you could ohm out the data wire to make sure it has continuity to the ecm from the aldl connection on the 800 crkt also chk your ground at the aldl connection and you should also have fuel pump voltage there been a while but i can look it up if you need some wireing help with the aldl

WASyL

which pin should be checked for aldl and which one for fuel pump ?

morf33

ok heres the pin out
F E D C B A
G ______ M

A GROUND
B TEST DIG
C AIR IF IT HAS IT
E SERIAL DATA
F TCC
G FUEL PUMP
M SERIAL DATA
What i would do is jump e to ground does the ses light give you the 12 trouble code if not chk for ckt 461 thats pin e in the aldl connector to a8 in the ecm connector do a ohm test and see how it does also other pins you can chk if not is the proper voltages and grounds going to the ecm
e- a8
b - a9
a - a12
from aldl to ecm
let me know your results this i hope helps i have a hard time explaning things some times.

morf33

WASyL

thanks, i''l check that wne i'll get back form work, but what is: ckt 461 ??

morf33

the wire going from pin e to the ecm

RBob

iTrader: (1)

Don't jumper E to ground. That will short out the serial line driver in the ECM.

To pull codes jump A & B together. That will cause the SES light to blink out codes at key-on, engine-off.


RBob.

WASyL

i know that A and B are used to get codes, thought that he has another "trick" to chceck something else

regards

morf33

opps ya ment b sorry thanks for the spell chk

morf33

but do chk e to the ecm for continuity
to make sure that it is good connection to the ecm