budlightdave
11-15-2007, 08:33 PM
okay it a 92 d150 2 wheel drive, manual 5 speed, 3.9 motor. When the temp outside is below 50 the truck will not start, cranks fine, has spark, if i go out side and turn the key the fuel pump relay will start to click after awhile depending on temp. then the truck will start. is backfires sometimes either hot or cold. fuel pump 1 year old, fuel filter 1 wek old, fuel pump relay 6 months old, plugs, cap, rotor, wires 1 month old. IAC replace last winter. is the a fuel injectior sensor or warm relay? im and stumped i been fighting this promblem for 2 years now. when temp above 50 starts right up, but backfire even then.