is my S300 dead?
is my S300 dead?
my car was cutting out at high rpm. i assumed it to be ignition related, so i kept messing with my coil ( external MSD ) and distributor. i could never find anything wrong.
one day my car is cutting out again, so i slow down.. all is well. then, it dies. almost like running out of gas.
i pull over to the side of the road and the car turns over and won't start. so now i'm thinking distributor again. all of a sudden, i try to start it and what do you know? it works. wtf?
so. i drive home and the car drives great. two days later my car starts. while warming up it dies. instantly. i'm thinking spark again.
so, i take the external coil off, put the dist back to normal and still won't start. it turns over and over. no starting. i now notice a CEL. i go to pull the code. there is none. kinda' like when i used to disconnect my s200 unit.
i also notice no fuel pump noise. hm. so, i pull the ecu and plug in a stock one. i now heard the fuel pump pressurizing the system and the car would fire up but, obviously, not run. this ruled out my OBD-I harness as being the problem.. i think.
anyway, so i took the S200 out of a p72 ecu and installed the S300 unit. i hooked up the ecu. again, the car starts, but dies, as it did after switching in a stock ecu. i STILL have a CEL that has no code and never goes away.
i was unable to attatch the datalog with this post, as the hondata is not reading anything. it connects okay. i see the yellow lightning bolt light up when i turn the key on, however none of the sensors are reading at all after i connect.
so my question: is it possible the S300 unit died?
one day my car is cutting out again, so i slow down.. all is well. then, it dies. almost like running out of gas.
i pull over to the side of the road and the car turns over and won't start. so now i'm thinking distributor again. all of a sudden, i try to start it and what do you know? it works. wtf?
so. i drive home and the car drives great. two days later my car starts. while warming up it dies. instantly. i'm thinking spark again.
so, i take the external coil off, put the dist back to normal and still won't start. it turns over and over. no starting. i now notice a CEL. i go to pull the code. there is none. kinda' like when i used to disconnect my s200 unit.
i also notice no fuel pump noise. hm. so, i pull the ecu and plug in a stock one. i now heard the fuel pump pressurizing the system and the car would fire up but, obviously, not run. this ruled out my OBD-I harness as being the problem.. i think.
anyway, so i took the S200 out of a p72 ecu and installed the S300 unit. i hooked up the ecu. again, the car starts, but dies, as it did after switching in a stock ecu. i STILL have a CEL that has no code and never goes away.
i was unable to attatch the datalog with this post, as the hondata is not reading anything. it connects okay. i see the yellow lightning bolt light up when i turn the key on, however none of the sensors are reading at all after i connect.
so my question: is it possible the S300 unit died?
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Based on the information provided, it sounds like a bad ecu. You said that the ecu did not work properly with an s200 either. IF you cut J1 will the ecu work as a stock ecu? There could be a socketing probelm or the ecu is just dead. Best thing to do is use process of elimination. Substitune known good parts for what you suspec to be the problem.
Spunkster wrote:Based on the information provided, it sounds like a bad ecu. You said that the ecu did not work properly with an s200 either. IF you cut J1 will the ecu work as a stock ecu? There could be a socketing probelm or the ecu is just dead. Best thing to do is use process of elimination. Substitune known good parts for what you suspec to be the problem.
maybe i wasn't clear. i'll reiterate:
no fuel pump. car would not start. constant check engine light, but no codes. took out p28 ecu that had s300 in it. hooked up p72 ecu that had s200 in it ( chipped for a different car. wrong tune ) to see if the fuel pump worked. it did. car would start, but not run because the tune was, obviously, wrong. i then hooked up stock ecu. fuel pump also came on, car started, then didn't run ( not tuned for my injectors ).
this led me to believe either the ecu was bad or the s300.
so, i uninstalled the s200 unit out of the p72 ecu and installed the s300 unit. all soldered pieces that went into the p72 for the s300 were new. only the s300 unit from the p28 was transfered over.
now, the fuel pump pressurizes and the car starts, then dies after about three seconds. i still have a CEL, no codes. the only time i've had a CEL and no codes is when i used to unplug my s200 box when i used to run that system. i have no clue what a CEL and no codes means while using the s300.
so, changing ecus got my fuel pump to come on, yet the car still won't run. also, my lap top connects to the s300 unit, but none of the sensors are picking up any signals. to me, this sounds like a faulty s300 unit.
am i wrong?
sorry for the confusion, and thanks for all your help.
Please call us as it will be much easier to put all the pieces together and come up with a resolution to this issue.
If the P72 was previously socked it is always a possibility that a track was lifted or burned while removing the socket. The old P28 that is not priming the fuel pump...you should cut J1, if the fuel pump still does not prime, then the ecu itelf is damaged. We need to start narrowing down what we are looking at as good and bad to filter one from the other.
If the P72 was previously socked it is always a possibility that a track was lifted or burned while removing the socket. The old P28 that is not priming the fuel pump...you should cut J1, if the fuel pump still does not prime, then the ecu itelf is damaged. We need to start narrowing down what we are looking at as good and bad to filter one from the other.
understood. i'm hesitant to cut J1, as the ecu is not mine and the owner is not available to contact. but if that's the only way then i'll cut it. i'll go try that right now. thanks. i'll give you guys a call tomorrow.Spunkster wrote:Please call us as it will be much easier to put all the pieces together and come up with a resolution to this issue.
If the P72 was previously socked it is always a possibility that a track was lifted or burned while removing the socket. The old P28 that is not priming the fuel pump...you should cut J1, if the fuel pump still does not prime, then the ecu itelf is damaged. We need to start narrowing down what we are looking at as good and bad to filter one from the other.
last question: lets say it was the ecu. now the S300 is in a new ecu. the fuel pump primes.. so it's not the ecu, right? yet i STILL have a CEL, no codes and the S300 unit is not reading any signals from any of the sensors. it connects, but that's it. no A/F, TPS, RPM, .. nothing.
thanks, again, for the help.
actually i don't think i re-loaded the cal file, no. i'll try that today. while i'm at it i'll be sure i have the latest software as well. i'll check all that out and post the results. thanks, again.Spunkster wrote:Have you downloaded the latest version of software and then tried uploading a new calibration to the ecu and then datalogging and trying to start the car with the second ecu?
update:
with P28 ecu/s300: no fuel pump. no start, constant CEL, no codes. laptop connects to s300 and uploads files fine, but reads nothing from ANY of the sensors.
with P72 ecu/s200: fuel pump worked, constant CEL no codes ( blue box not plugged in ), car started then died (completely wrong tune).
*removed s200 from P72 and installed s300*
with P72/s300: fuel pump worked, constant CEL no codes, car starts then dies.laptop connects and uploads files fine, but reads nothing from ANY of the sensors. s300 has constant red light that flashes off, occasionally ( i have no clue what s300 LEDs mean, yet ).
with stock ecu: fuel pump worked, no CEL, car started and idled decent, shut car off before waming up ( 650cc injectors/stock ecu).
my conclusions ( can't test another s300 unit 'till jan 9 ) is that my P28 AND S300 were bad. which cause which, i dunno. which went out first, i dunno. but they both seemed to be bad.
now i have a good ecu, but s300 is still bad.
any comments??
with P28 ecu/s300: no fuel pump. no start, constant CEL, no codes. laptop connects to s300 and uploads files fine, but reads nothing from ANY of the sensors.
with P72 ecu/s200: fuel pump worked, constant CEL no codes ( blue box not plugged in ), car started then died (completely wrong tune).
*removed s200 from P72 and installed s300*
with P72/s300: fuel pump worked, constant CEL no codes, car starts then dies.laptop connects and uploads files fine, but reads nothing from ANY of the sensors. s300 has constant red light that flashes off, occasionally ( i have no clue what s300 LEDs mean, yet ).
with stock ecu: fuel pump worked, no CEL, car started and idled decent, shut car off before waming up ( 650cc injectors/stock ecu).
my conclusions ( can't test another s300 unit 'till jan 9 ) is that my P28 AND S300 were bad. which cause which, i dunno. which went out first, i dunno. but they both seemed to be bad.
now i have a good ecu, but s300 is still bad.
any comments??
THe best thing to do at this point would be to send the ecu and s300 to us for testing. If we find there is a problem with the socketing of the ecu you will be charged a minimum of $75 for repairs to the ecu. It is suspected that the problem is in the ecu since all s300's are tested before shipping them out. You will need to put in a brief note explaining the problem along with your contact details so we know what to look for and who to contact.
Last edited by Spunkster on Mon Jan 23, 2006 10:15 am, edited 1 time in total.
the s300 worked great at first. now it doesn't work, no matter what ecu i put it in :(Spunkster wrote:THe best thing to do at this point would be to send the ecu and s300 to us for testing. If we find there is a problem with the socketing of the ecu you will be charged a minimum of $75 for repairs to the ecu. It is suspected that the problem is in the ecu since all s300's are tested before shipping them out. You will need to put in a briend note explaininghte problem along with your contact details so we know what to look for and who to contact.
i'm going to put a new s300 unit in the ecu. if that works i know it's the s300 and not the ecu. if it's the unit, i'll send it back. if it's the ecu i'll use another one, not a problem.
i just want to make sure which is the problem before i send everything out and spend money, ya know?
you seem very, very sure it's the ecu, though i've tried more than one.
thanks, very much! i appreciate the help.
The failure rate of s300 is less than a fraction of 1% this is why we suspect the ecu. There is much more to go wrong in the ecu and also the fact that the s300 is tested before being shipped. Many people try to socket their own ecus, or try to convert an already socketed ecu to have the male pins and this is where the ecu's are damaged. Tracks are lifted, cut, broken and burned. If you saw some of the "socketing" jobs we've seen come in here, you would understand our position. Also remember that most of these ecu's are at least 11 to 12 years old to begin with.
fixed the problem. not an S300 issue ;)
voltage regulator died in first ecu. pcb reworking s200 to s300 resulted in multiple broken/missing traces (NOT MY WORK!!!) on the second ecu. i had to add 6 jumpers to repair the ecu.
so it's all good now :)
voltage regulator died in first ecu. pcb reworking s200 to s300 resulted in multiple broken/missing traces (NOT MY WORK!!!) on the second ecu. i had to add 6 jumpers to repair the ecu.
so it's all good now :)
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not to mention some faulty wires on the harness-side of the ecu. when will people learn to stop hacking up their harnesses???RMS wrote:fixed the problem. not an S300 issue ;)
voltage regulator died in first ecu. pcb reworking s200 to s300 resulted in multiple broken/missing traces (NOT MY WORK!!!) on the second ecu. i had to add 6 jumpers to repair the ecu.
so it's all good now :)