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Thread: Convert DS4 to DB2 pump

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  1. #1
    16gaSxS is offline Moderator, Have Shotgun & dogs will travel
    Join Date
    May 2002
    Location
    Great Falls, MT
    Posts
    1,014

    Post Br455;

    BR455;

    Fist please go to the user CP and fill out your signature with your truck year and info see mine for an example. Please also tell us about how many miles are on your beast.

    First thing you should do is CHANGE your fuel filter if you had not. The cost from $15-40 depending where you get them an all seem to be made by Stanadyne so quailty is the same. Second go over all your electricals AGAIN grounds included clean them and maybe even get some electrical cleaner spray and take all the plugs apart and spray them.

    Here is a link to a trouble shooting area: http://www.thedieselpage.com/members/tt99-9.htm

    This is a "members only area". If you haven't spend $20 and join, the resources have saved me thousands over the last 10 years. Between the subscription and ad's it keeps this great place going for us for the last 10 years.

    Now if your stalling keeps up it could be the ill fated famous PMD/FSD problem.
    Start taking liter of bottle water with you. This is a black square driver mounted on the iNjection pump. If it stalls again and if it is the PMD/FSD it will when it won't restart pour water on the PMD/FSD or put snow or ice on it. If it starts up it's very good chance that is your problem. If thats the deal do a search for PMD/FSD and you will get a weeks worth of reading.

    Hope this helps.
    95, 6.5, C-2500 extended cab shortbox, Auto transmixer 3.42 diff, Jardine exhaust system
    FSD Cooler replaced w/ Heath PMD Isolator
    Heath Turbo-Master Boost Controller, Max E Tork chip '97 cooling upgrades, Kennedy Fan clutch,
    Glow Plug over ride,DeeZee 38.5 gallon Aux fuel Tank 225K miles and rolling

    1994, 6.5 Blazer, 3:42 diff, 4 inch exhaust, Heath PMD Isolator, Heath Turbo-Master Boost Controller Max E Tork, Heath SB intake filter system.
    221K miles and rolling.
    Diesel Page member #81

  2. #2
    Join Date
    Aug 2000
    Location
    Jacksonville, FL USA
    Posts
    459

    Default

    Your truck being 4WD with OBD II makes the swap a bit more complicated, but it is possible. If its an automatic, its a bigger challenge, manuals are pretty easy. As for the problems with a DB2, yes they can break. However, I don't think you will find anyone that has even a basic knowledge of the two pumps to tell you the DS4 is more or even as reliable as a DB2. One thing, when the DS4 fails (usually without warning) the truck usually won't run. When a DB2 fails, it usually will run, just maybe not perfectly. There is no reason a DB2 equipped 6.5 cannot start, idle or produce the fuel economy of a DS4 equipped engine.

    I'm not saying a DB2 conversion is the solution to your problems, but it may be worth considering. The DB2 lets you eliminate the APP, vacuum pump and related wastegate plumbing as well for even more reliability. The are plenty of products on the market to "fix" the DS4. I don't think they would be selling in the numbers they do if it were the paragon of reliability some would have you believe. I've driven both for about a hundred thousand miles each. I much prefer the DB2. Others like the DS4.

    One more thing, I'm certainly not against technology, just unreliable technology. If I thought the DS4 was the best way to go, I would still have one. Our new car (we still have the Sub) is a VW Jetta Diesel with Pumpe D
    Bobbie Martin
    1995 Chevrolet Suburban 1500 6.5 TD 2WD- DB2 mechanical fuel injection
    GEP Optimizer 6.53 Detroit Diesel Power
    6.53L, GEP Block & Heads, .020 over, ARP studs, DB2 Inj. pump, GM8 Turbo w/TurboMaster
    K47 Airbox with K&N filter, 3" mandrel bent exhaust, 2ΒΌ" Crossover, Mann ProVent
    HO Water Pump, Hayden "Truck Fan" Clutch, 21" 9 blade Duramax Fan

    No PMD, APP, CDR, optical sensor or vacuum pump!
    Author of The DB2 Conversion Guide
    Click Here to Email Me

  3. #3
    Join Date
    Mar 2000
    Location
    Windham, ME
    Posts
    2,490

    Default

    [QUOTE=Bobbie Martin]

    One more thing, I'm certainly not against technology, just unreliable technology. If I thought the DS4 was the best way to go, I would still have one. Our new car (we still have the Sub) is a VW Jetta Diesel with Pumpe D
    Phil

    '90 Jeep Wrangler, 4.2l, AX15, Dana 30 & 35 with 3.07s (for now!) 4" Rough Country lift, 33x10.5x15 BFG KM2s

    '91 F350 XLT Lariat crew cab, 2WD SRW, 7.3l IDI, ZF S5-42, 3.55 LSD.

  4. #4
    Join Date
    Aug 2005
    Location
    Utah
    Posts
    11

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    I would just like to let everyone know how helpfull Bobbie has been in answering my questions and responding to my PM messages. I really appreciated it.
    Thanks
    Brent
    97 K1500 Automatic with Transgo upgrades. Intercooler, BD computer, K&N, Gear Drive, FSD cooler, 3.5 exhaust, gauges, the normal stuff. Is now being converted to a Marine DB2 mechanical pump with all the relevent changes.

  5. #5
    16gaSxS is offline Moderator, Have Shotgun & dogs will travel
    Join Date
    May 2002
    Location
    Great Falls, MT
    Posts
    1,014

    Default

    Quote Originally Posted by BR455
    I would just like to let everyone know how helpfull Bobbie has been in answering my questions and responding to my PM messages. I really appreciated it.
    Thanks
    Brent

    Bobbie is just another own of the great folks that make The Page work so well.
    95, 6.5, C-2500 extended cab shortbox, Auto transmixer 3.42 diff, Jardine exhaust system
    FSD Cooler replaced w/ Heath PMD Isolator
    Heath Turbo-Master Boost Controller, Max E Tork chip '97 cooling upgrades, Kennedy Fan clutch,
    Glow Plug over ride,DeeZee 38.5 gallon Aux fuel Tank 225K miles and rolling

    1994, 6.5 Blazer, 3:42 diff, 4 inch exhaust, Heath PMD Isolator, Heath Turbo-Master Boost Controller Max E Tork, Heath SB intake filter system.
    221K miles and rolling.
    Diesel Page member #81

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