Engine stutters and vibrates when accelerating

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If you've inspected the distributor cap for carbon tracking the next thing to check would be fuel pressure.

To do this you need to remove the flexible fuel line in the engine compartment and install the pressure gauge inline where the line was. Most pressure kits will have the adapter. You should have 9-13psi at idle.

You might also want to see if you have any diagnostic codes stored. You can check these easily on the truck buy jumping to pins on the data link connector under the drivers side of the dash, cutting the key on an d counting the check engine light flashes. It will first flash one long and two shorts three times indicating it's in self test mode. It will then flash your codes and then flash code twelve once all the codes have been read indicating it's done. I'll post a list of the codes and a picture of what to jump below.

12. System OK ( Diagnosis mode active )
13. Oxygen O2 Sensor †Circuit open/no activity
14. Coolant Temperature sensor †Too High resistance or shorted circuit
15. Coolant Temperature Sensor †Circuit low or Open
16. Direct ignition system (DIS) †faulty circuit / shorted circuit
17. Camshaft Position †Sensor/Circuit/Timing error
18. Camshaft or Crankshaft †Sensor/Circuit/Timing error
19. Crankshaft sensor †Sensor/Circuit/Timing error
21. TPS ( Throttle position sensor ) †Out of range/Performance
22. TPS ( Throttle position sensor ) †Low Voltage
23. IATS ( Intake Air temp sensor ) †Out of range, low resistance
24. VSS ( Vehicle speed sensor ) †Circuit fault
25. IATS ( Intake Air temp sensor ) †Out of range, high resistance
26. QDM A ( Quad-driver module ) †Circuit #1 fault
27. QDM A ( Quad-driver module ) †2nd gear circuit
28. QDM A ( Quad-driver module ) †Circuit #2 fault
29. QDM A ( Quad driver module ) †4th gear circuit
31. Wastegate solenoid †Circuit fault
32. EGR ( Exhaust Gas Recirculation ) †Circuit fault
33. Map ( Manifold Air Pressure Sensor ) †Signal out of range, high resistance
34. Map ( Manifold Air Pressure Sensor ) †Signal out of range, low resistance
35. Idle air control valve / Sensor †circuit fault
36. Ignition system †Circuit error/fault
38. Brake input ( Brake switch sensor ) †circuit fault
39. Clutch input ( Clutch sensor ) †circuit fault
41. Camshaft sensor †Circuit fault or ignition control †circuit fault/error ( Depending on the car model )
42. EST (Electronic spark timing) †circuit grounded/shorted
43. Knock sensor / Electronic spark control †circuit fault error ( Depending on the car model )
44. Oxygen O2 sensor †Lean Mixture
45. Oxygen O 2sensor †Rich Mixture
46. Pass-key II †circuit or Power steering pressure switch †circuit fault error ( Depending on the car model )
47. PCM data †circuit error
48. Misfire ( diagnosis )
51. Calibration error †mem-cal, ecm or eprom failure
52. Engine oil temperature circuit †low temperature indicated / Circuit error
53. Battery voltage †low/high/error or Egr valve solenoid 1 †Circuit error ( Depending on the car model )
54. Fuel Pump †Circuit error or Egr valve solenoid 2 †Circuit error ( Depending on the car model )
55. ECM PCM †Circuit error or EGR valve solenoid 3 †Circuit error ( Depending on the car model )
56. Quad-driver module (QDM B) †circuit error
57. Boost control †Error / Faulty
58. Vehicle anti-theft system ( VATS ) †circuit faulty
61. AC (Air conditioning) system performance or degraded oxygen sensor signal ( Depending on the car model )
62. Engine oil temperature sensor †high temperature indicated
63. Oxygen O2 sensor right side †circuit open or MAP ( Manifold air pressure sensor ) †out of range ( Depending on the car model )
64. Oxygen O2 sensor right side †lean mixture indicated
65. Oxygen O2 sensor right side †rich mixture indicated
66. A/C (Air conditioning ) pressure sensor †circuit low pressure
67. A/C (Air conditioning ) pressure sensor †circuit or a/c clutch †circuit failure ( Depending on the car model )
68. A/C (Air conditioning ) compressor relay †circuit failure error
69. A/C (Air conditioning ) clutch †circuit / pressure high
70. A/C (Air conditioning ) refrigerant pressure †circuit high
71. A/C (Air conditioning ) evaporator temperature sensor †circuit low
72. Gear selector switch †Circuit error / Fault
73. A/C (Air conditioning) Evaporator temperature †circuit high
75. Digital EGR #1 †solenoid error/faulty
76. Digital EGR #2 †solenoid error/faulty
77. Digital EGR #3 †solenoid error/faulty
79. Vehicle speed sensor (SS) †circuit signal high resistance
80. Vehicle speed sensor (vss) †circuit signal low resistance
81. Brake input data †circuit faulty
82. Ignition control (IC) 3X †signal error/faulty circuit
85. Prom †error/faulty circuit
86. Analog/digital †pcm error /faulty circuit
87. Eprom †error / Faulty circuit
99. Power management †Error / Faulty circuit