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  1. Replies
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    Distributor spec'd out perfectly when I...

    Distributor spec'd out perfectly when I originally installed it. Even the Camshaft position sensor reported good with proper values during hand turning.

    Totally different scenario when cranking...
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    RESOLVED: NEVER TRUST reman distributors from...

    RESOLVED:
    NEVER TRUST reman distributors from local parts houses. This distributor has less than 1000 miles on it and is shot.
    Luckily i had a donor vehicle to trade parts on and compare. Pulled...
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    CMP is in the distributor. CKP is in the front...

    CMP is in the distributor. CKP is in the front timing cover
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    Little more troubleshooting here, the engine...

    Little more troubleshooting here, the engine startup routine is nearly the same with the Camshaft position sensor unhooked. It still has way too much advance in timing (like before) with the sensor...
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    I logged EST PIDs and could only acquire data...

    I logged EST PIDs and could only acquire data when the engine was running. The only PIDs that affected the timing when idling was the following:
    EST - Base Spark
    EST - Idle Spark
    EST - Run Spark
    ...
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    Engine is a 5.7L Vortec stroked to 383. Using the...

    Engine is a 5.7L Vortec stroked to 383. Using the 2002 Chevy Express tune
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    Checking a few tolerances out on the crank...

    Checking a few tolerances out on the crank sensor. The block was line bored before assembling so I want to see if this could be a factor.

    I measured a good working donor truck and measured the...
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    Are there tables that could affect cranking...

    Are there tables that could affect cranking spark? Multipliers, etc.?
    Maybe I can zero those out if there are any.
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    I think I am on the right track. Bulletin No.:...

    I think I am on the right track. Bulletin No.: 00-06-04-014

    "Cause:
    A condition may exist that allows the crankshaft position sensor to command up to 50 extra degrees of spark advance during...
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    Actually, one thing to note here, I could never...

    Actually, one thing to note here, I could never get the CASE relearn process to properly complete. I can perform the process and rev to the ~4000 rpm and stumble, but the code never resets. Possible...
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    I have never been able to log spark when...

    I have never been able to log spark when cranking. Here is the last log trying to capture spark while cranking.

    21110

    This is a 2001 S-10 with a L31 V8.
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    Weird Cranking Saprk Issue

    Hopefully someone else has come across this issue. I have a problem with the PCM commanding ~80 degrees timing while cranking (verified with a timing light and the fuel shut off). Engine is very hard...
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    Does anyone know what the resolution was to...

    Does anyone know what the resolution was to Richard_T's issue?
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    FIXED! Thanks, Joecar for all your help! You...

    FIXED!

    Thanks, Joecar for all your help! You rock!
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    V2 A/D Voltage with Pass Through

    Hello all,

    Having an issue with the V2 that hopefully someone has ran across. I have the V2 connected with AD voltage applied to AD1. I have verified the voltage is proper with a DVOM. I am able...
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    That sounds like an Anti-Theft issue.

    That sounds like an Anti-Theft issue.
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    I have not. I do know that I am having a tough...

    I have not. I do know that I am having a tough time getting the pesky P1336 with no luck. Am awaiting spring weather and use of a Tech II to try and resolve.

    What combo is your engine? How far is...
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    Hog, I was intrigued by your build with separate...

    Hog, I was intrigued by your build with separate coils on an L31 engine. Pretty cool! I wished I would have went that route since I had Vortec 5.3L coils sitting in the garage and to have the LS...
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    Actually I am running so fat in cold temps that I...

    Actually I am running so fat in cold temps that I am not experiencing any lean issues with throttle opening events.
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    Logging Spark During Start-up

    I have the Main VE table dialed in (THANK YOU Joecar!!) and am now working on first cold start-up issues.

    Engine is a 383ci L31 Vortec with Mercruiser MPFI, 36# injectors, XFI280 camshaft, P&P...
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    Will do. The weather here is topping out around...

    Will do. The weather here is topping out around 60 degrees. Is this still a decent temperature for tuning? What temperature range for outside ambient is suitable for tuning?
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    I have a pretty decent log so far. Let me know...

    I have a pretty decent log so far. Let me know what you think!

    Will add filters to clean up the data, but is looking good!

    15993
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    Just wanted to touch base here since the weather...

    Just wanted to touch base here since the weather is nearly perfect for tuning. Is this a good starting point to work on the VE?

    Thanks!
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    So basically you are correcting the VE table by...

    So basically you are correcting the VE table by using the MAF table?

    I will remove AFR from the PID list and start this again. Just to confirm, I am ready to put this in the PCM and log for the...
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    15971 Changed back what you have requested....

    15971

    Changed back what you have requested.
    Thanks for your help JOECAR!!
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