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Thread: P0216-Bucking/Stuttering

  1. #1
    Join Date
    Sep 2006
    Location
    Delaware
    Posts
    104

    Talking P0216-Bucking/Stuttering

    Hey guys....(& Gals )

    1st off, great site!!!

    ... bought a '96 C3500 CC on Sept. 16th. I "consulted" all the threads here I could find prior to and felt pretty good about it. It's been worked.... has close to 230k on the Od. but looked to be in good shape aside from some dents and a "smoked-in" interior. FSD cooler on the In.Manifold made me feel better too.

    Anyhow.... drove it a week and it ran great... loaded up the truck camper and headed down the road for some R&R... Got approx. 30mins in and I noticed what felt like a miss @ 55mph cruise on?? Screwy I thought so I took the cruise off and ran a bit with the foot. Came to a stop light and when I tried to leave the light the truck kicked and sputtered from 1500rpm up.... thought I had a PMD going south... but it never stalled. So we made it in and enjoyed our weekend. Loaded up to come back... no problems.... for 30-40mins then started with the temper-tantrums again. It reminded me of when I lost my "point-gap" on my old vw beetle.... but it idled fine!!

    The truck sat a week while I ordered a new pmd. Thanks to the cooler access the pmd was a snap and 10mins later I was back on the road... however the fabled 30mins later... back to sputtering and the SES light appears (P0216-Timing Circuit) Next thought went to my fuel quality... so I had my wife fire up the truck while I drained the water... only no water... in fact, no fuel and the truck stalled!!! Ah hah!!! LP!!! So a new carter, filter and bruised knuckles later - back at it!!! This time no sputters!!!! Cleared the P0216 and it's a no show too!!

    Thanks for all your help guys!!! Any comments on how fuel starvation could throw a timing related code??? I don't know my TDC offset so I may still need an adjustment... but runs fine now!!!

    Les
    '96 C3500 Crew SRW, 228k, auto, 4:10, 265X75r16
    'PolarFlo' FSD Cooler
    1966? Covered Wagon 9'-10' Slide-In camper
    '03 VW Golf TDi (Stock) - +40's mpg (avg)
    "Any boy can be a Father... it takes a man to be a Daddy!"

  2. #2
    Join Date
    Apr 2001
    Location
    CA
    Posts
    13,652

    Arrow

    Welcome to the Forums! And thanks for the info!

    Weak fuel delivery will absolutely effect timing. Several things come into play. If you have a fuel filter nearing replacement condition, the suction (vacuum) in the fuel line will cause "outgassing" of the fuel, introducing a compressible gas in the fuel, which will retard timing. Also, a lower-than-expected fuel volume will cause a descrepancy with the PCM and pump. The condition you describe is typical of a lift pump failure, and indicative of nothing else, so nothing to worry about at this time. You may consider a lift pump relay to relieve the load on the OPS. The indication, so far, is it will also lend to longer lift pump life.

    All of the above can also have an effect on IP hardware durability. Running with a weak or failed lift pump will decrease the longevity of the IP, and running under a "less than optimal" fuel injection condition, can and will cause other issues. This includes higher EGT's, loss of economy, and higher wear rates on valve train and other engine components. These are generally long term effects, but most folks that have 6.5's keep them for a long time. Especially when they have a resource like TDP!
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  3. #3
    Join Date
    Sep 2006
    Location
    Delaware
    Posts
    104

    Default

    Thanks DmaxMav....

    I'll take all the info in I can and apply as much as ($) possible.....

    Seems often enough for the fellas to... forgive me but "piss and moan" over all the gripes and complaints of problems they have... I do too at times. Some seek advice or help and some just like to heard... both fair examples of humanity. I just wanted to take the high road and give a little back when due and offer an example of what a little patience/persistence, research and just plain luck can do.

    I'm a new Chevy owner coming from a '93 W250 Reg.Cab w/Cummins. I love the cummins.... marginally like the truck. I bought the Chevy for the truck part, but the engines growing on me too!! It's no M-Duty engine.... but it doesn't shake & sound like one either. (Happier family!)
    '96 C3500 Crew SRW, 228k, auto, 4:10, 265X75r16
    'PolarFlo' FSD Cooler
    1966? Covered Wagon 9'-10' Slide-In camper
    '03 VW Golf TDi (Stock) - +40's mpg (avg)
    "Any boy can be a Father... it takes a man to be a Daddy!"

  4. #4
    Join Date
    Nov 2005
    Location
    Brady, Republic of Texas
    Posts
    248

    Default P0216 on Full Tank

    Was searching and found y'all talking on this. My 97 Tahoe popped a P0216 code today immediately after filling up and I might say topping off. I was low on fuel and put just a hair under 28 gallons (I think I have a 32 gallon tank) and upon restart the p0216 CE Light hit and I drove another 100 miles thereafter. Later in the day starts were rough. Later in the day the light went off and all seems OK. I pulled the code and it's P0216.
    Could the issue have cleared itself, the ECU reset any problem that was resolved?
    How could filling up the tank pop that code?

    Any help is appreciated.
    Mark Magee
    98 Burb 2500 LT 4x4 VIN G, 4:10's 180K miles, Amsoil Bypass/full flow filters, Turbo Master, Heath ECU Reflash, Duraterm GP's, New Injectors, Walbro FRC-13 LP, 480LE Rebuilt 2X, Vacuum Pump Delete, K&N Filter, Fluid Damper, DTech remote bumper mount PMD, Kennedy Exhaust, Kennedy Fan Clutch, Robertshaw 192F stats, 2.5" Crossover, CAT gutted, Fumoto Drain, Alcoa Centerline Wheels, Ride Rite Airbags.
    2013 Keyston Fuzion 301 Toyhauler 9,100#s empty
    Velocity XLFG N34XL
    Brady Texas Hill Country

  5. #5

    Default

    When a fault no longer appears, the code will self clear. Kinda nice, isn't it ?

    Lyndon
    www.ecmprogrammer.com
    Westers Garage
    1-888-WESTER-1

  6. #6
    Join Date
    Nov 2005
    Location
    Brady, Republic of Texas
    Posts
    248

    Default Self Clear

    Lyndon,
    Thanks for that info. I'm a little confused however: my CE light went OFF, but the code still registers and the truck runs great.
    So then:
    The ECU cleared the fault, shut the light off and kept in memory for me to pull to understand why it turned the light on?
    Did I say it right?...

    Anyway, how come filling my tank up threw that code and the poor running???
    Mark Magee
    98 Burb 2500 LT 4x4 VIN G, 4:10's 180K miles, Amsoil Bypass/full flow filters, Turbo Master, Heath ECU Reflash, Duraterm GP's, New Injectors, Walbro FRC-13 LP, 480LE Rebuilt 2X, Vacuum Pump Delete, K&N Filter, Fluid Damper, DTech remote bumper mount PMD, Kennedy Exhaust, Kennedy Fan Clutch, Robertshaw 192F stats, 2.5" Crossover, CAT gutted, Fumoto Drain, Alcoa Centerline Wheels, Ride Rite Airbags.
    2013 Keyston Fuzion 301 Toyhauler 9,100#s empty
    Velocity XLFG N34XL
    Brady Texas Hill Country

  7. #7

    Default

    How low was the tank when you refilled ? You must have been on the edge of right empty.
    Yes, the code will remain in history until 50 ignition cycles (provided no further problem exists) or scan tool code clearing event.

    Lyndon
    www.ecmprogrammer.com
    Westers Garage
    1-888-WESTER-1

  8. #8
    Join Date
    Nov 2005
    Location
    Brady, Republic of Texas
    Posts
    248

    Default P0216 on Full Tank

    Tank was -low-. I put in 28 gallons. Just looked up that I have a 30 gallon tank: so 2 gallons left. Not sure how much of the remaining 2 gallons are usable however.
    It was a mistake to run it that low, but I live in central west Texas and gas stations few and far between.

    How could have refilling set off P0216 however??...
    Mark Magee
    98 Burb 2500 LT 4x4 VIN G, 4:10's 180K miles, Amsoil Bypass/full flow filters, Turbo Master, Heath ECU Reflash, Duraterm GP's, New Injectors, Walbro FRC-13 LP, 480LE Rebuilt 2X, Vacuum Pump Delete, K&N Filter, Fluid Damper, DTech remote bumper mount PMD, Kennedy Exhaust, Kennedy Fan Clutch, Robertshaw 192F stats, 2.5" Crossover, CAT gutted, Fumoto Drain, Alcoa Centerline Wheels, Ride Rite Airbags.
    2013 Keyston Fuzion 301 Toyhauler 9,100#s empty
    Velocity XLFG N34XL
    Brady Texas Hill Country

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