starts but drives like crap - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 5 (permalink) Old 06-29-2009, 05:03 AM Thread Starter
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starts but drives like crap

i got an early 99 7.3 with a six speed stick, went to start it today and it took at least 20 second to turn over, once it did it idled at maybe 250 rpms almost dying for about another 20 seconds, then went back to normal, i thought it was weird but i havent drove it in a couple days so i thought nothing of it, driving it felt like a washing machine, didnt die but had absolutly no power till it hit about 3000rpms then it only pulled barely, any ideas?

03 GMC Sierra ext cab/sb 4x4, air raid intake, magnaflow exhaust, edge juice with attitude, rhino lined bed, leveled
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post #2 of 5 (permalink) Old 07-01-2009, 01:48 PM
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How many miles are on it?
Original injector o-rings?
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post #3 of 5 (permalink) Old 07-02-2009, 04:09 AM
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not sure on this but could the hpop res be draining back to the pan while it is sitting. Can check through the plug hole on top of the res before you start it the next time.

2003 F-350 XLT 7.3L 4X4 Crew Cab, 3.73, Custom built 4R100, AFE intake, Turbonetics BB Turbo W/1.0 A/R exhaust housing, 238/100% Hybrids from Jim @ Rosewood, 5 inch exhaust w/ 6 inch stacks, Tuned my Matt @ Gearhead, Autometer colbalt gauges, Custom built traction bars, viair dual compressor onboard air system. Mickey Thompson Classic II Rims with 315/75R16 BF Mud Terrains, and 4 inch Rough Country lift kit

New Truck: 2000 F-450 XL 7.3L Standard Cab, 6 Speed Stock for now

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post #4 of 5 (permalink) Old 07-03-2009, 09:42 AM Thread Starter
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its got 162k everything is original, ill check the hpop tomorrow, i got a buddy that thinks it might be a lift pump, but his expertise is with cummins,

03 GMC Sierra ext cab/sb 4x4, air raid intake, magnaflow exhaust, edge juice with attitude, rhino lined bed, leveled
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post #5 of 5 (permalink) Old 07-03-2009, 01:37 PM
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There is no "lift pump" on a 7.3. There is an HPOP and a fuel pump.

Check both.

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