1984 Dodge Truck engine running rough after it warms up

1984 DODGE TRUCK

78,000 MILES • V8 • 2WD • AUTOMATIC

TOM FIRABEN

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My truck just started running rough on my way to the store it runs fine until it warms up,then it hesitates and stalls out when i go to take off.I,ve replaced the plugs,plug wires ,dist. cap,rotor,ignition coil,fuel filter and still no luck.What should i try next?

Aug 22, 2009 at 10:37 AM

DOCFIXIT

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Hi Need to test temp sender and O2. Coolant sensor test, see diagrams,At operating measure resistence from sensor connector to ground. Must be 1300 ohms or higher. if not replace sensor. O2 test find carb to computer output a Green wire alone with connector, Put volt meter Pos lead there and ground Neg. Enginr at op. temp. run at 1500rpms. Close choke 5 sec voltage should decreace to 3 v or less. Release choke keep at 1500rpm 10 sec. voltage shoulg return to 9v. Also remove PCV from valve cover during this test. If O2 does not meet Voltages replace. Hope this helps Thanks for donate

Aug 22, 2009 at 11:14 AM