Fuel pump..the PCM module, ignition control module, fuel ... When you turn the key to On, the fuel pump may run from 2 seconds to 2 minutes before it turns off. We replaced the PCM module, ignition control module, fuel filter, PCM diode with no luck. It seems like the longer the truck sits, the worse the problem. After 4 hours, it may run 10 seconds, after 8 hours, it may run 30 seconds. Fuel Pump Related No Start Problems What Should You Do Fuel Pump Check List. Bad fuel pump (Pump should run for a few seconds when ignition key is turned to start, no buzz means no fuel delivery to the engine). Blown fuel pump relay (Relay is energized by PCM to route power to fuel pump when ignition is on). Part 3 How to Test the Ford Fuel Pump Relay (Green Relay) TEST 3: Jumpering The Fuel Pump Circuit OK, so far you have confirmed that the fuel pump relay on your Ford car or pickup is getting power on wires labeled with the numbers 2 and 4.. In this test step, we're gonna' jumper two wires (numbers 3 and 4) together to manually get the fuel pump to activate.. Although it's not absolutely necessary, you should connect a fuel pressure gauge to the ... 1998 s 10 pick up. no power to fuel pump. relay good, 1998 s 10 pick up. no power to fuel pump. relay good, Submitted: 10 years ago. Category: Chevy. ... 24 pin connector.you need to check for power while turning the key on at terminal 1. This is a dark green wire with a white stripe. ... 1998 chev venture no power from pcm to fuel pump relay #3 green and white wire ... 1999 Chevy Blazer No Power to the Fuel Pump 2CarPros Also could you let me know how you checked for power @ pump. Did you check the actual wires on pump? Let me know? When ignition switch is turned to ON position, PCM turns on electric fuel pump by energizing fuel pump relay. PCM keeps pump on if engine is running or cranking (PCM is receiving reference pulses from ignition module). Educate me on the PCM Fuel System PlanetNautique Forums Educate me on the PCM Fuel System. Collapse . X. Collapse. Posts; Latest Activity . Search. Page of 2 ... When you turn on the key, does the fuel pump pressure up? Check the shrader valve at the top of the fuel pump (looks like a tire valve) and see if there is pressure in the line while ignition is on. ... You can unplug the MEFI system relay ... no power to fuel pump relay 1992 Chevrolet S10 Blazer No power to fuel pump relay (1992 Chevrolet S10 Blazer) ... it is a four wire relay. their is .3 volts coming from the pcm on the orange wire which should be 12volts of constant power feeding the relay. The pcm, engine, and fuel pump all have a good ground. ... Elc fuel pump does not come on win i turn key 2 start jump relay no checks fuess ok ... What role does the ecm play in giving the fuel pump power ... What role does the ecm play in giving the fuel pump power to turn on? When I put the key forward I don't hear the fuel pump activate. ... Now when i turn key on pump primes and tail lights come on. Pump shuts off tail lights go off. ... then check for current going from your computer relay to your fuel relay with a volt meter or a test light ... GM Fuel Pump Relay Testing how to test a fuel pump relay in a power distribution box. power side switched circuit design description and operation. Fuel pump power and ground testing. Its Not the fuel pump Power Fuel Car Talk munity If the fuel pump doesn’t turn on this doesn’t immediately point to the fuel pump. It points to all of that stuff between the car’s power system and the pump relays, wiring, switches and such. You need a voltmeter, or at least a 12V test light. From now on whenever you start the car, pause in the run position before cranking it over. No Power To Fuel Pump gm trucks i have a 02 sierra denali with a 6.0. replaced fuel pump and confirmed it was not working .now i have no power to fuel pump.checked fuses and swithed out the relay. seem like the relay is not being told to switch. what controls it the pcm?jumped power from the fuse box back no problems. Please help fuel pump not turning on! | Mustang Forums at ... be mistaken for the fuel pump relay. Relay: Turn on the key and jumper the ECC test connector as previously described. Look for 12 volts at the dark green\yellow wire (relay controlled power for the fuel pump). No voltage there means that the relay has failed, or there is a broken wire in the relay control circuit. 7.3 deisel not getting fuel | PlowSite hello, I have a 1998 ford e 350 van with a 7.3 powerstroke engine and its not getting any fuel. when I turn the key on the wait to start light does not come on nor does the check engine run it test on start up that light dont come on . heres what I have done. No Start Fuel Pump Not Getting Power | Mustang Forums at ... Watch out for the WOT A C control relay on these cars, as it is located in the same place and can easily be mistaken for the fuel pump relay. Relay: Turn on the key and jumper the ECC test connector as previously described. Look for 12 volts at the dark green\yellow wire (relay controlled power for the fuel pump). Fuel Pump Relay Location: Started and Stopped Running ... What relays have you checked and how did you check?If it has an ASD relay pull it out and reset it back in and see what happens. The computer energizes the ASD relay and in turn might power the coil injector s and fuel pump something like Chrysler products Could very well be the PCM

fuel pump relay turn key on and check for power from pcm to fuel Gallery


technical car experts answers everything you need fuel

technical car experts answers everything you need fuel

97 ford thunderbird 4 6 radiator fan and fuel pump stay on

97 ford thunderbird 4 6 radiator fan and fuel pump stay on

jeep cherokee sport 1989 jeep cherokee sport battery grounded

jeep cherokee sport 1989 jeep cherokee sport battery grounded

i have a 1995 dodge ram 1500 the fuel pump would not turn

i have a 1995 dodge ram 1500 the fuel pump would not turn

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i have a 1988 ford bronco ii i do not have any response on

1995 ford thunderbird lx 4 6 v8 starting problems in

1995 ford thunderbird lx 4 6 v8 starting problems in

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