Let's talk about O2 sensors and Spark retard....

JSM

JSM

Active member
Re: Let's talk about O2 sensors and Spark retard....

Get your wideband tied into the stock ecm, buy a 3 bar map sensor and do the research on custom tuning. (i would suggest code59). I can tell you have attention to detail needed, we just gotta get you to talk english not foreign stuff.
 
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MikeMcNair

New member
Re: Let's talk about O2 sensors and Spark retard....

lol, totally! i speak better german than i do "american" ;)

i have all the ability to go code 59, or 3bar map/tune, but i would like to get the truck running correctly STOCK first. then go from there.

god only knows how long this truck drove at 20 psi with no fuel etc. so i am trying to back track all of the PO's "mods" and bring this back to a nice place mechanically.

once i get her running right, (and consistently!!!!) i will explore more power, and more options.

i do however have lowered compression, forged rods and pistons, and all ARP hardware, so when the time comes for more boost/different tuning, i should be all set ;)
 
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MikeMcNair

New member
Re: Let's talk about O2 sensors and Spark retard....

nah, i am in Pennsylvania, USA. the armpit of the earth.

been to europe quite a bit, and love it!!! why do you ask?
 
bezerk

bezerk

New member
Re: Let's talk about O2 sensors and Spark retard....

well. cause you were into european cars and spoke german better than english it was an easy geuss?
i'm in the netherlands europe
 
berzerker

berzerker

wookie
Re: Let's talk about O2 sensors and Spark retard....

are you showing this spark retard all the time , i'f so i'd bet your yor ecm is taking a crap on you. i'f it's showing while just normally driving down the road , you've got false knock issue's i.e. loose exhaust , loose something rattling around in the engine compartment .
 
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MikeMcNair

New member
Re: Let's talk about O2 sensors and Spark retard....

i wasn't before, but am now. when reving the motor, in neutral, i saw 1-2 degrees of spark retard, which i never saw before.

once i bolt the IC back down, i till do a full "rattle" test to see whats going on.

you are very right tho, it could be a wrench rattling around in there :)
 
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MikeMcNair

New member
Re: Let's talk about O2 sensors and Spark retard....

here is an interesting question:

if i get an O2 sensor that has 2 white wires on it, and one black, but has no "weatherpack" style plug on it, how do i know which white goes where?

does that make sense?
 
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MikeMcNair

New member
Re: Let's talk about O2 sensors and Spark retard....

ok, i got my O2 back in, and she runs great. BUT..............

the fuel was still showing knock, so the first time i hit boost, i got an ESC error code (DTC #43) and from there i altered the fuel pressure, and no more timing pull!!!!!

i did however notice, that at WOT, the truck wont go past ~ 3300 rpm's. why the hell is it stuck at low revs? is it the DTC?

if i clear the code, will it let me rev to ~ 4500 or is there nothing to do together between the two?
 
bezerk

bezerk

New member
Re: Let's talk about O2 sensors and Spark retard....

bad knocksensor? ECM? did you set the timing?
 
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MikeMcNair

New member
Re: Let's talk about O2 sensors and Spark retard....

not too sure. i did not touch the timing. it was running really rich for a but due to no O2, and as soon as i put the O2 in, i took the car out for a spin.

first time i hit boost it pulled the code. then, the light went out, and the car boosted fine, AFR's were great, and everything was cool with one exception:

i could not accelorate past ~ 3300 rpm's. it felt like it was pulling timing, but it wasn't.

not too sure what the issue is.

the truck runs fine, and is only pulling ~ 3 degrees at ~ 15 psi @ WOT and 3200 rpm's.
 
bezerk

bezerk

New member
Re: Let's talk about O2 sensors and Spark retard....

if the code is still there it will pull back 5 degree of timing i believe. you should post a dm file. you still have a cat? is it overboosting perhaps? so it falls flat on his face after it went over 15psi?
 
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