my car is too rich ?!?!?!

[xxninja]

welp guys i finally got the scanmaster 2.1 in the car and and around 8 pounds of boost im gettin some audible knock on my car.

Im not gettin any degree of knock retard on the scanmaster, but my O2's are sort of high. , i was up to around 860 millivolts with 8 pounds of boost, i know i can get more boost out of the car but the pinging sound scares me.

i am running a thrasher 92 street chip in my basically bone stock 85 national, with a converted ecm. the set fuel pressure for this chip is supposibly 45 static.
is it ok to turn it down? or would that do more damage then good?
i dunno where to start with this, im tired of buying something and thinkin it is the solution. I have new plugs and msd wires, as well as the impala maf with the translator, i also have the walbro 340 fp, and the adj regulator.
This problem is driving me nuts!!!!!!!!!!!!
shoud i just attempt to turn the fuel pressure down or could it be the coil pack gone bad or possibly a sort of bad o2 sensor?
i have the original coil pack thats 17 years old, could that cuase bad spark and cause the car to not detonate properly???

I have tried 3 chips and they all produce the same results no matter which chip, the car runs great at idle with no miss or anything
just when i get on it, its get a ping or crackling type or sound around 8 psi boost.

below are some scanmaster values from last night
id appreciate any input
thanx alot guys

brian xxninja @aol.com


af: 6 or 7
bat 13.8
int : 128
bl : 128 idle goes down to 105 driving
clt : 167 degrees
ats: 75 degress
tps .46/ 4.72
iac 47

 

[crazygn]

one of to thing you can turn down the fp a little or up the boost to make up for the exta fuel you have. I think your running rich because if you are at 105 on the bms then the ecm is trying to slow down the injector to pull fuel from the motor.

let me know if iam wrong guys, pretty new with the scan tools my self.

 

[xxninja]

well i am running a stock turbo on an 85 with 36# injectors
they might be too much for the turbo, until i can upgrade
im wondering how low i can take the fp ?????????
what is a standard fuel pressure for a hot air car , 34-40 static ?

i changed the o2 and lowered the fp to like 40, and i still get it around 10 pounds of boost with 93 mixed with 5 gallons of 110
it cant be octane

my plugs are bout two months old, maybe i should gap them smaller, to like 32 insted of 35?

i have msd wires

my car spools quick as hell and wants to go above 10 pounds but i wont let it, cuz of the crackling sounds

could it have anythign to do with the transmission possibly?
im just throwing ideas to try that dont cost alot. im tired of dumping cash into a pretty car that wont run right for me

thanx guys

appreciate all help

xxninja@aol.com

 

[WFO]

the chip is calibrated for an intercooled car that needs a whole lot more fuel than a hotair.i'm guessing the popping you are hearing is from being too rich,especially if you are not showing any knock.

i'd start turning the fuel pressure down little by little and watch the knock gauge.860 is PIG rich.start turning the fp down and your boost will probably start going up.bring it down to low .800/high .700's.watch that knock gauge like a hawk.

what plugs are you running?


later,sean

 

[xxninja]

i got the o2's down alot
between 750 and 800

i bought new plugs, the ac delco 43Ts something
i gapped them at like 34-35

my car runs stronger and it is improving, but when i drive i sort of feel a slight miss in it

i have nice wires already
i think it might be the coil, maybe its not giving all the cylinders the right spark

that coil is the original 85 pack, it could be shot.
so i am gunna try to get a used one and just see if thats it, or get caspers' tester

welp thanx for the help for now
brian

 

[FJM568]

When my car was the stock 85 setup with 87 ecm and MAF translator, I ran the Thrasher chip and had to turn my fuel pressure back to about 39#, vacuum line off to get it so it wasn't completely rich...I had to do the same when running the Jay Carter street chip that I had, which I had bought from someone else(was set up for his car)...

Make sure you are running the AC CR43TS plugs...

Is it a miss or is it a surge that you have??? Might very well be some type of vacuum leak or misadjusted IAC...There are a few different ways of setting the IAC other than the factory way listed on the gnttype site...Joe Lubrant had a way of setting the IAC that works great...You may be able to find his procedure in the archives here on TB.com or gnttype's archives...It has been posted somewhere, but not sure if it was written up onto the tech pages on gnttype or not...

 

[xxninja]

ok fellas, i got sort of an update on this car
i do appreciate all advice, its just driving me nuts

well i replaced the coil and the ignition coil thingy

my car isnt too rich and isnt too lean like anywhere from 750-810 usually on the o2's

i have my adj regulator at about 38# psi amd i dont think it goes lower but it will go higher, are these acufab regulators designed to go lower then 36-38 psi?

is it possible that a stock turbo thats 17 years old just is tired and cant keep up with the larger injectors(36#) and a walbro 340? does anyone know what a stock 85 turbo is capable of builing, boost wise , like 10-12 ? maybe the fuel system keeps going and the turbo can produce any more after 9-10 psi?


the car builts boost very quickly, the car has like 16-17 pounds of vacuum

maybe that damned up pipe has sort of a leak and wont let the turbo build over 10 psi?
im just thinking of any kinda of possibility


maybe u have some more opinion for mr question
sorry i ask soooo many
but its hard to get advice from guys in real life, when they say things like "hey man thats a sweet monte carlo "

 

[WFO]

Originally posted by xxninja

my car isnt too rich and isnt too lean like anywhere from 750-810 usually on the o2's

perfect.

i have my adj regulator at about 38# psi amd i dont think it goes lower but it will go higher, are these acufab regulators designed to go lower then 36-38 psi?

i think they should go lower than that,but you don't need to.

is it possible that a stock turbo thats 17 years old just is tired and cant keep up with the larger injectors(36#) and a walbro 340? does anyone know what a stock 85 turbo is capable of builing, boost wise , like 10-12 ? maybe the fuel system keeps going and the turbo can produce any more after 9-10 psi?

a stock turbo will make 50# of boost if you want it to.of course the air coming out will be about 5000 degrees... i think the stock turbo is good to about 20-22 psi before it starts making too much heat.

maybe that damned up pipe has sort of a leak and wont let the turbo build over 10 psi?

exhaust leaks will make your spoolup go to hell but they will usually let you reach max boost eventually.

do you have an adjustable wastegate?

later,sean

 

[xxninja]

i do have an adjustable waste gate
i got it as far as it will go in
its takes a while for the boost to build over 7-10 psi
i took my up pipe off and and sanded it and put rtv copper along the connections, im going to let it dry over night.

my next question is, i have read that alot of people take one of the hoses off the wastegate selenoid or add a bleeder valver ?!?!

would it be better to try disconecting the 1 hose and control the boost with the adj wastegate, fuel regulator and the scanmaster?

any opinions on doing this?
thanx

brian

 

[WFO]

Originally posted by xxninja


would it be better to try disconecting the 1 hose and control the boost with the adj wastegate, fuel regulator and the scanmaster?

that's what i'd do.if i'm not mistaken all you need to do is hook up a hose from the turbo outlet to rear port on the wastegate(the one farthest from the rod).that will get you running "tuner" style,basically the rod length is controlling the boost.i'd loosen up the rod first to make sure you don't overboost .

later,sean