Is it a 12v or 24v? Have you changed the filter? Do you have fuel pressure at the injection pump? IN 1998 there was still the 12v p7100 engine being put in the early trucks. The late portion of that year had the 24v vp44 engine. We need alittle more info please.
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2001 extra cab 2500 SLT laramie (dark blue over silver) 4x4 S.O. 55 block, 47re, silencer ring/resonator/muffler are MIA, gauges, big bumper up front, B&W turnover ball, 315 buck shots, and Quadzilla XZT+ (thanks DieselNut)
'89 GMC Sierra SLX 1500 4x4 186K 350TBI w/custom 400 tranny
'06 Freightliner Business Class M2 106 tandem w/lockers,30k# winch, and Altec digger/derrick