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Type: Posts; User: Asteroid

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  1. Replies
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    Please provide specific info on how you did this...

    Please provide specific info on how you did this or point me to where I can find it. What pin needs to be grounded and I assume the PCM was powered up when you did this.
  2. Thanks for pointing out my inexperience. I will...

    Thanks for pointing out my inexperience. I will try to find the airflow pid's. If you can suggest the one's I need I would greatly appreciate that. On a good note, I replaced my MAP and logged a...
  3. Thanks for your observations. The data log shows...

    Thanks for your observations. The data log shows data in strip chart form and digital form on the left. TPS voltage is in the digital list along with other data. This was not an idling run and the...
  4. Thanks for pointing that out, I picked the wrong...

    Thanks for pointing that out, I picked the wrong file. I have a better one now which I will attach. Please examine from 10.0033 to 10.0039 just after start up there is 7sec of stable operation at...
  5. Engine Surging at Constant Throttle, No load

    Help me solve this problem. Scan file and tune file attached. I have replaced every sensor, tried 2 different (0411) PCM's, two sets of injectors and two different wiring harnesses and the problem...
  6. Replies
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    1,459

    Wow, I can't thank you enough for spotting that...

    Wow, I can't thank you enough for spotting that error. I was just chasing my tail all over the place on this. This forum is awesome...
    Asteroid
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    1,459

    Another After Start Problem

    The engine lights off but then dies. Scan data shows a large first pulse and then drops off too about 2ms. The engine will not hold idle.
    Will not take the throttle, it just dies faster.
    ...
  8. Replies
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    4,219

    I tried an F-Body OS and it didn't work. Where...

    I tried an F-Body OS and it didn't work. Where is the systems options matrix located? In the editor under 'Systems' I can only find things like prndl, fans, VATS and A/C control. Can I access the...
  9. Replies
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    4,219

    C5 PCM Used with Cable Throttle Body?

    Can a fly by wire PCM (C5 Corvette) be used with a mechanical throttle body on the engine? What needs to be done to delete the FBW and still use the C5 PCM?

    I have a '99 Corvette PCM and harness...
  10. Replies
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    1,536

    No Start on E85 w/ Large Injectors

    I have been running E85 on a 442 LS engine with 60# high Z injectors with no problem. I have switched to a larger 492 LSX with 95# low Z injectors. I have an AEM injector driver in the system to...
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    3,867

    Thanks, that's what I was looking for. A

    Thanks, that's what I was looking for.
    A
  12. Replies
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    3,867

    Thanks for the tip but I cannot display a .bin...

    Thanks for the tip but I cannot display a .bin file on this desktop computer.
    A
  13. Replies
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    3,867

    E85 Stoich Chart

    Does anyone have a chart of stoich for Ethanal content around 85%? I just tested my E85 and it checked out as E90. I would like to see a chart of stoich from 70% to 95% in increments of 5%.

    What...
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    Need Help w/ E85 AFR to Lambda

    I have an AEM E85 wide band gauge kit on my engine using a 411 PCM. I want to convert to lambda and the instructions show a transfer function as follows:

    AFR = 1.567 * (V) + 4.825

    This is...
  15. Replies
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    6,307

    I have the EIO feature on my HPT cable and I have...

    I have the EIO feature on my HPT cable and I have been logging WB data from an LM1 with no problem (running on gas). I plan to continue WB data acquisition this way with E85 so no need to bring it...
  16. Replies
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    6,307

    Thanks, that is good news. I also run with stft...

    Thanks, that is good news. I also run with stft enabled and ltft disabled. I will continue to run that way on E85.

    As to 'lambda', I have no problem thinking in lambda. Is there any way to get...
  17. Replies
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    6,307

    Narrow Band O2 Sensors w/ E85

    Is there any way to use the OEM narrow band O2 sensors for short term fuel trims with E85? I'm converting to E85 on my NA 442 LS engine with a SD tune. Do I just disable the stft's? I suspect they...
  18. Replies
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    Yes, I have Siemens 60# injectors (69@58), dual...

    Yes, I have Siemens 60# injectors (69@58), dual fuel pumps and large lines. My main question is; Will changing the stoich to 9.7 and power enrichment to 1.2 get me in a safe ballpark with my SD...
  19. Replies
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    3,963

    E85 Tuning Method

    I want to convert to E85 on my NA 442cid LS jet boat engine. I'm using an F-body 411 PCM. My plan is to change the scoich value to 9.7 and use EQ ratio (power enrichment) of 1.2 to set WOT at 8.08...
  20. Replies
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    8,992

    Yes, I have been concerned with that also. This...

    Yes, I have been concerned with that also. This is a 14:1 engine and I have a geared starter on it to help with cranking. My data shows that it is cranking at 60-70 rpm with a fully charged...
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    Thanks for your comment, sorry I was abrasive. I...

    Thanks for your comment, sorry I was abrasive. I may be new to this forum but I am not new to HPT.. I do not do this for a living and my experience has been in a rather narrow application (NA...
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    The first pulse is a fuel spike to get things...

    The first pulse is a fuel spike to get things moving, after that my injectors are delivering a flow pw of 4+ ms for the remainder of the cranking cycle. Now if you can tell me how to reduce that...
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    8,992

    You might want to check the times on those posts....

    You might want to check the times on those posts. I was responding to post #6 while you were posting #7. So yes, I posted what became #8 before #7 was available to me... I've been looking for a...
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    It's not backfiring, its just burning excess fuel...

    It's not backfiring, its just burning excess fuel in the headers... My scan data shows that my cranking timing is at 12.5* which is about perfect I think... At this time I do not have control of...
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    It has C5 coils and I run 58 psi fuel pressure. ...

    It has C5 coils and I run 58 psi fuel pressure.

    The displacement is possible with the LSX tall deck block. I've been building large displacement LS engines for road racing Corvette's for a while...
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