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:confused:
i changed my injectors today and after a few minutes of VE updating
for idle, i turned off the car to make some manual changes.
i attempted to re-start the car and it would not fire up.
i felt a hard reset was in order so when i went through the motions,
it seemed to not reboot.
usually i can hear the fuel pump whine for 2 seconds but,
for some odd reason it will whir for a half second.
i feel it is not rebooting.
i have 35PSI with the key on.
Can you use the scanner to clear all the codes? Sounds like Reduced Power Mode. Had that happen a few times.
what is that? {B???}Quote:
Originally Posted by TFZ_Z06
i can connect/scan + down/upload.
my fuel pump seems to be "stuck",
when normally rebooting you will here the fuel pump make a whirring sound
when turning the key to the on position in starts to "whir" but gets cut short.
know what i mean?
i am leaning toward my fuel pump now,
but i don`t see why that would crap out after a simple injector swap
and was up and running immediately after the new injectors were installed.
but the fact that my fuel pump seems to be "choking" while the ignition is
turned on points me that way.
other wise i am going to install my stock ECU in the morning and
see what happens. :doh2:
I would click on the "red engine" in the scanner software and see which DTCs are set. I suspect you are in Reduced Power Mode. If you have not, just clear all DTCs especially since you are still able to read/write the RRQuote:
Originally Posted by mr.prick
Try checking {G1201} Anti Theft Configuration. This is sometimes a pain on the aussie cars and gives the same symptoms you describe, short fuel pump prime and no start. Try setting it to none. See if that works.
Quote:
Originally Posted by TFZ_Z06
i tried both of these first when this all happened and i`m still not gettingQuote:
Originally Posted by limited cv8r
the fuel pump to prime completely.
any more suggestions?
i connected my stock ECU and i have P1626,
and cannot retrieve the tune BUT the fuel pump now cycles.:confused:
i cannot retrieve the VIN with the tune.exe and cannot download to it either.
so maybe the BCU is at fault?
In the DVT tab (output control) of the scan tool there is a fuel pump option, you could try activating this just to verify your fuel pump works and you are getting pressure, have you done a full flash of your RR with a known good .tun file, or lastly try your stock PCM.
DTC P1626
<A href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=705413&pubid=238&evc=sm&cellId =59384#ss1-705413">Circuit Description
The body control module (BCM) produces the theft deterrent fuel enable signal when ignition is ON and the proper key resistor pellet is sensed. The powertrain control module (PCM) monitors the fuel enable signal during crank. If the proper signal is present on the theft deterrent fuel enable circuit, the PCM enables fuel delivery to allow the engine to start. If the PCM detects that the fuel enable signal is not present or incorrect while the engine is running, DTC P1626 will be set. DTC P1626 can cause a no-start condition or normal operation depending on when the loss of the fuel enable signal was detected. The engine will continue to start and run if the condition that set DTC P1626 occurred after the BCM sensed the proper key resistor pellet and signaled the PCM to continue fuel delivery. The engine will start and immediately stall if the condition that set DTC P1626 occurred before the BCM sensed the proper key resistor pellet. With this condition present, the PCM will inhibit fuel delivery and the BCM will disable the starter.
<A href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=705413&pubid=238&evc=sm&cellId =59384#ss2-705413">Conditions for Running the DTC
The engine is running.
<A href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=705413&pubid=238&evc=sm&cellId =59384#ss3-705413">Conditions for Setting the DTC
<A href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=705413&pubid=238&evc=sm&cellId =59384#ss4-705413">Action Taken When the DTC Sets
- The PCM detects an incorrect signal on the theft deterrent fuel enable circuit.
- The condition is present for more than 2 seconds.
<A href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=705413&pubid=238&evc=sm&cellId =59384#ss5-705413">Conditions for Clearing the MIL/DTC
- The PCM will not illuminate the malfunction indicator lamp (MIL).
- The PCM will store conditions which were present when the DTC set as Failure Records data only. This information will not be stored as Freeze Frame data.
<A href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=705413&pubid=238&evc=sm&cellId =59384#ss6-705413">Diagnostic Aids
- A History DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
- The DTC can be cleared by using a scan tool.
Many situations may lead to an intermittent condition. The following list is to be used as a guide to assist in detecting an intermittent:
- Loose terminal connection. Inspect the harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and faulty terminal to wire connection. Refer to Wiring Systems for diagnosis and repair.
- Damaged harness. Inspect the wiring harness for damage. If the harness inspection does not reveal a problem, observe the display on the scan tool while moving connectors and wiring harnesses related to the sensor. A change in the scan tool display may indicate the location of the fault. Refer to Wiring Systems for diagnosis and repair.
- Inspect the PCM and the engine grounds for clean and secure connections.
okay,
after connecting the stock ECU and recycling the fuel pump but,
not being able to down/upload the tune to it i reconnected the RR
and it started.
i and stumped as why this happened but i won`t look a gift horse in the mouth.
looks like i spoke too soon,
once i start the car flash scan looses connection and
the car run very poorly and won`t stay running.
also the RR will loose connection.
after a few tries it went back to not cycling the fuel pump.
i have tried all the easy fixes i can think of,
the windows, stereo and lights work but the fuel pump is locked out.
can someone confirm that flashscan will not be able to
connect/retrieve ECU info (VIN and tune) if the BCM is DOA.
i can`t down/upload or read the VIN with the stock ECU.
the RR connects, reads writes but will not update which is
a mute point because when i did get the car to idle it only did so
for maybe a minute then when kaput.
the fact that the RR can do everything but update seems to
prove it is vehicle (BCU?) related.
If you read my post from before, I could read/write, but could not updateQuote:
Originally Posted by mr.prick
the road runner realtime. This was the CABLE CONNECTION problem, a problem that starts at the round connector and ends on the RR board. AFTER I went DIRECT mini-usb (which is built in the RR Board interntallu), I completely got all functionality back. I was advised to do this by Craig M, because I could not connect via bluetooth and could not real time read/write w/the cable. He stated this is a known problem and that by bypassing the round connector, all would be fixed. It was.
By the way, I'm not sure what the deal with yours is, just passing on some useful info.
ANOTHER THING TO CHECK!! I sprayed my original RR w/hosepipe by accident washing my car.
Make sure next time its out there is not water in it. This killed my first RR. The 3v lithium battery on the RR circuit board was dead to name a few problems.
the RR works fine, because of the fuel pump not "cycling"
i thought the RR was not rebooting (hard reset), so i posted here.
when i hooked up the stock ECU the fuel pump cycled and i thought all is well
and reconnected the RR, i then started the car and
for a few second everything seemed to work fine but,
i could not update, then the connection dropped and the car
started to miss an died.
with the stock ECU i could not read or write or retrieve the VIN status.
this is what make me think it is BCM/VATS.
fbodies are notorious for the BCM, key and (or) the ignition tumbler going bad.
all fuses seem to be fine and i only unhooked the injectors harnesses
when i changed them, so it is not an unhooked connection,
i think just a coincidence that all is going wrong immediately after the
change of fuel injectors. :confused:
if the BCM does indeed lock out the scan tool, i pretty sure
it is the culprit, but i would like to be sure before
dropping $150 for a new BCU.
like i said everything else works.(stereo, lights, windows ect.)
FWIW i changed {G1201} to none, and that did nothing.
from what i`ve read it`s not that simple to bypass the BCM.
why i was able to reconnect to the fuel pump for a short time after
hooking up the stock ECU the reinstalling the RR, i think that was a fluke
because it was all but a minute and then it is back
to being locked up.(fuel pump)
i have seen someone de-solder the relays in the BCU and clean off the connection, then re-solder it back together.
i do not have the tools/know how to attempt that. :throw:
i wish we could do something with the BCU. :chair:
i got all discombobulated when i first started to try to update with the RR,
thinking the car was running poorly due to needing VE adjustment
for the new fuel injectors.
it wasn`t till your recommending it was reduced power mode
i started looking elsewhere.
does anyone know how i would be able to "test" the BCM or
if this sounds definitively like a failed BCM? :help2:
Hmmm...when I first installed my RR 'guts' kit...I had one badly soldered foot on the RR PCB header. Truck wouldn't start. Everything worked 'except' the fuel pump.
I told one of the guys on here what was happening and his first question "does the fuel pump prime?".
So...if there's a problem with the soldered connection/chip....everything seems to work 'except' the fuel pump.
Also...after finally getting it running....I'd be driving along RTACS'ing and when it would 'drop out' the truck would hicup...and sometimes die. I always managed to get it going again though.
This is what I did today...we'll see how it goes tomorrow!
http://img.photobucket.com/albums/v3...M/P8030194.jpg
http://img.photobucket.com/albums/v3...M/P8030191.jpg
http://img.photobucket.com/albums/v3...M/P8030196.jpg
i know the RR is working because i can connect/operate it.
as for the fuel pump being cut off during priming, that seems to be intermittent.
the stock ECU connects but can`t down/upload or retrieve the VIN.
it freezes while logging, so the RR drops out.
i`m trying to choose between the ignition tumbler, the BCM or/and the OBD2 port
as the possible culprit.
passkey relearn:
after clearing the DTC`s,
turn the ignition switch to the “On” position for 11 minutes,
then turn the ignition switch off for 30 seconds.
Mr.Prick, what car do you have...?
On some models yo have to repeat that two more times (total of 33 minutes).
i have an `02 camaro.Quote:
Originally Posted by joecar
this worked for me last nite,
but now the car is down again.
it will crank, but not start.
i can give it gas while cranking and it will start but
run extremely rich and die almost immediately.
i seem to get the P1626 DTC intermittently and i am wondering now
if it my ignition relay or something other than VATS.
the fuel pump primes when the key is first turned, but after it stops cranking
it will re-prime.
like turning the key on and off, then on again.
this is not from the RR, the stock PCM does this as well.
i am just trying to figure out why i can drive the car a few times then have to go through this again.
Regarding PASSkey/VATS/BCM:
If you crank and it does not start, turn key all the way off before trying to crank again...
this will prevent PASSkey learn mode from initiating (when initiated it won't let you start for 11 minutes, and if you do try to start the 11 minutes starts over).
The unfortunate thing is, on F-bod the BCM is not on the serial bus so we can't see what codes it's throwing.
i got P1626Quote:
Originally Posted by joecar
and U1016 in the freeze frame data.
for some reason i can`t retrieve the calibration details from the tune.exe,
i am going to try to put a resister between circuit #1073 and #1074.
i thought the BCM shuts down the fuel pump but,
i seem to be getting fuel,no spark
the fuel pump just re primes after i stop cranking.
here`s 2 logs while cranking
log1 has the PIDs i have been using while driving and log2
has PIDs i thought may be helpful for diagnosis.
Attachment 3809
Attachment 3810
you will see that IBPW is high, i never logged while cranking so i don`t know
if it is abnormally high.
also more importantly is the battery voltage drop,
this is a new battery BTW.
You have a bad ground cable/connection.
With your DMM see if you can locate the cause of the voltage drop.
Don't know if this is any use to you.
http://www.gearchatter.com/viewpost14016.php