What would cause the ecu to pull timing?
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From: Atlanta, GA, USA
What would cause the ecu to pull timing?
Went to the dyno today and laid down 184hp/ 125tq and my curve on the first few runs was typical.
Then the last few runs dip in the middle from 5k - 7k.
You can see the car moving on the dyno where the dips are while it's happening.
The A/F is totally flat at 13 so that is normal.
I can feel the car sputter driving it around town as well.
Could it be the ecu or the dist?
I need some advice.......
Then the last few runs dip in the middle from 5k - 7k.
You can see the car moving on the dyno where the dips are while it's happening.
The A/F is totally flat at 13 so that is normal.
I can feel the car sputter driving it around town as well.
Could it be the ecu or the dist?
I need some advice.......
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From: Atlanta, GA, USA
Re: What would cause the ecu to pull timing? (Padawan)
That's what I was thinking but the sensor isn't throwing a code and the plugs were new, PFR6G-11's.
We had a fan blowing on the intake manifold to lower the temps and it was cool to the touch during the runs, fan on the front as well.
I did switch back to the BKR6E-11's (week old) and same problem.
It may be loose tho as I put the head on the block and then put the KS on but couldn't tq it to specs because space was limited.
We had a fan blowing on the intake manifold to lower the temps and it was cool to the touch during the runs, fan on the front as well.
I did switch back to the BKR6E-11's (week old) and same problem.
It may be loose tho as I put the head on the block and then put the KS on but couldn't tq it to specs because space was limited.
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From: Atlantis
Re: What would cause the ecu to pull timing? (Trey)
.....where did you go trey?
Send me your dynojet files - this should be interesting!
If you're running an obd2 ecu, it actually tries to change and adapt to some degree against a vafc it seems. Best thing to do is turn off the car immediately after each dyno pull. Letting it idle, the ecu tries to change stuff imho.....
Send me your dynojet files - this should be interesting!
If you're running an obd2 ecu, it actually tries to change and adapt to some degree against a vafc it seems. Best thing to do is turn off the car immediately after each dyno pull. Letting it idle, the ecu tries to change stuff imho.....
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From: Atlanta, GA, USA
Re: What would cause the ecu to pull timing? (Trey)
All you technical ****'s on here and no suggestions?
It's not the KS since I'm using the JDM P73 so anyone else have an idea?
It's not the KS since I'm using the JDM P73 so anyone else have an idea?
Re: What would cause the ecu to pull timing? (Trey)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Trey »</TD></TR><TR><TD CLASS="quote">All you technical ****'s on here and no suggestions?
It's not the KS since I'm using the JDM P73 so anyone else have an idea?
</TD></TR></TABLE>
I don't have any inputs to your problem but why would a JDM P73 rule out the KS? Reason i am asking is beacuse i am running a JDM P73 on 94 JDM GSR. Thanks.
It's not the KS since I'm using the JDM P73 so anyone else have an idea?
</TD></TR></TABLE>
I don't have any inputs to your problem but why would a JDM P73 rule out the KS? Reason i am asking is beacuse i am running a JDM P73 on 94 JDM GSR. Thanks.
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From: san antonio, tx
Re: What would cause the ecu to pull timing? (Black R)
[QUOTE=Black RIf you're running an obd2 ecu, it actually tries to change and adapt to some degree against a vafc it seems. [/QUOTE]
this is exactly what happens to my car once it warms up. Jeff at IB says that once the car i at running temp, the ecu kills what the VAFC helps.
Is there any way to stop the obd2 from trying to lose it grip on the controls? besides hondata
this is exactly what happens to my car once it warms up. Jeff at IB says that once the car i at running temp, the ecu kills what the VAFC helps.
Is there any way to stop the obd2 from trying to lose it grip on the controls? besides hondata
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From: King Tubbys studio, CA
Re: What would cause the ecu to pull timing? (Trey)
I know it sounds silly, but have you considered a bad ignitor in the distrib? When mine was going bad, it sputtered often, and I had a loss of power in the mid range. Also, what fuel pump?
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From: naples, florida, usa
Re: What would cause the ecu to pull timing? (Trey)
I've heard it helps to Plug in a Code Jumper in when on the Dyno it kinda puts the ECU in a Headlock and distracts it from throwing any codes
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From: Atlanta, GA, USA
Re: What would cause the ecu to pull timing? (rodrez)
Thanks for a helpful suggestion.
I was also thinking about the dist as a potential problem.
I plan to swap the ecu and see if that fixes it then swap the dist.
Hopefully that will narrow it down to a single faulty piece.
I have a GSR fuel pump.
I was also thinking about the dist as a potential problem.
I plan to swap the ecu and see if that fixes it then swap the dist.
Hopefully that will narrow it down to a single faulty piece.
I have a GSR fuel pump.
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From: Atlantis
Re: What would cause the ecu to pull timing? (topspeed86)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by topspeed86 »</TD></TR><TR><TD CLASS="quote">I've heard it helps to Plug in a Code Jumper in when on the Dyno it kinda puts the ECU in a Headlock and distracts it from throwing any codes </TD></TR></TABLE>
I have always wondered that as well.....
Is this really true? Maybe some obd2 guru's can chime in here.....
(sorry to take your thread OT Trey.
)
I have always wondered that as well.....
Is this really true? Maybe some obd2 guru's can chime in here.....
(sorry to take your thread OT Trey.
)
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From: King Tubbys studio, CA
Re: What would cause the ecu to pull timing? (Trey)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Trey »</TD></TR><TR><TD CLASS="quote">Thanks for a helpful suggestion.
I was also thinking about the dist as a potential problem.
I plan to swap the ecu and see if that fixes it then swap the dist.
Hopefully that will narrow it down to a single faulty piece.
I have a GSR fuel pump.</TD></TR></TABLE>
Be sure to post the results, you've got me curious now
I was also thinking about the dist as a potential problem.
I plan to swap the ecu and see if that fixes it then swap the dist.
Hopefully that will narrow it down to a single faulty piece.
I have a GSR fuel pump.</TD></TR></TABLE>
Be sure to post the results, you've got me curious now
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From: Atlanta, GA, USA
Re: What would cause the ecu to pull timing? (rodrez)
Knock sensor was loose, I took it off with my hand. 
I need to find a deep socket that will fit it so I can tq it down to specs.
I replaced teh 02 as well since I had an extra and I was under the car.
I'll post the results tomorrow evening.
Ken, that trick makes sense since you use it to keep the ecu from messing with the timing when you are setting the timing.
I need to find a deep socket that will fit it so I can tq it down to specs.
I replaced teh 02 as well since I had an extra and I was under the car.
I'll post the results tomorrow evening.
Ken, that trick makes sense since you use it to keep the ecu from messing with the timing when you are setting the timing.
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From: san antonio, tx
Re: What would cause the ecu to pull timing? (topspeed86)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by topspeed86 »</TD></TR><TR><TD CLASS="quote">I've heard it helps to Plug in a Code Jumper in when on the Dyno it kinda puts the ECU in a Headlock and distracts it from throwing any codes </TD></TR></TABLE>
call me stupied but whats a code jumper?
glad you got your car running cool
call me stupied but whats a code jumper?
glad you got your car running cool
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From: Toronto, ON, canada
Re: What would cause the ecu to pull timing? (2dark2bslow)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2dark2bslow »</TD></TR><TR><TD CLASS="quote">
call me stupied but whats a code jumper?
</TD></TR></TABLE>
paperclip
call me stupied but whats a code jumper?
</TD></TR></TABLE>
paperclip
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From: san antonio, tx
Re: What would cause the ecu to pull timing? (ITR21)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ITR21 »</TD></TR><TR><TD CLASS="quote">
paperclip</TD></TR></TABLE>
haha, nice
is it safe to run that all the time? where exactly does it go?
TIA
paperclip</TD></TR></TABLE>
haha, nice
is it safe to run that all the time? where exactly does it go?
TIA
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From: King Tubbys studio, CA
Re: What would cause the ecu to pull timing? (Trey)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Trey »</TD></TR><TR><TD CLASS="quote">Knock sensor was loose, I took it off with my hand.
I need to find a deep socket that will fit it so I can tq it down to specs.
I replaced teh 02 as well since I had an extra and I was under the car.
I'll post the results tomorrow evening.
Ken, that trick makes sense since you use it to keep the ecu from messing with the timing when you are setting the timing. </TD></TR></TABLE>
ahhhh, knock sensor
I need to find a deep socket that will fit it so I can tq it down to specs.
I replaced teh 02 as well since I had an extra and I was under the car.
I'll post the results tomorrow evening.
Ken, that trick makes sense since you use it to keep the ecu from messing with the timing when you are setting the timing.
</TD></TR></TABLE>ahhhh, knock sensor
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From: Atlanta, GA, USA
Re: What would cause the ecu to pull timing? (2dark2bslow)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2dark2bslow »</TD></TR><TR><TD CLASS="quote">
haha, nice
is it safe to run that all the time? where exactly does it go?
TIA </TD></TR></TABLE>
There is a blue, two pin, plug above the ECU.
haha, nice
is it safe to run that all the time? where exactly does it go?
TIA
</TD></TR></TABLE>There is a blue, two pin, plug above the ECU.
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From: King Tubbys studio, CA
Re: What would cause the ecu to pull timing? (Trey)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Trey »</TD></TR><TR><TD CLASS="quote">Tightened it all back down and reset the ecu, feels like a new car. </TD></TR></TABLE>
done and done
</TD></TR></TABLE>done and done
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