1997 Dodge Dakota Fuel Pressure

Tiny
MMMCCABE123
  • MEMBER
  • 1997 DODGE DAKOTA
Engine Mechanical problem
1997 Dodge Dakota V8 Four Wheel Drive Automatic

Engine cranks-will not turn over. Checked fuel pressure with fuel pressure guage on the fuel line rail-NO pressure.
Replaced 20 amp relay.
Re-tested=NO pressure
Any thoughts?
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Wednesday, March 10th, 2010 AT 2:25 PM

7 Replies

Tiny
JDL
  • EXPERT
Thanks for the donation. Did you check voltage circuits at the fuel pump relay? Did you check applicable fuses, use a testlite, you need to check for voltage, also. You might be able to check for mil codes without any special tools, I'd have to check. Voltage to the coil side of relay, goes hot with the key in the crank position. Voltage to the load/switch side of relay, is hot all the time.

You should be able to access some codes, by cycling the ignition switch. You turn key just till the dash lites come, no further. Cycle the key, on--off, 0n--off, 0n, then the mil starts flashing, you count the flashes to get the codes. Your looking for two digit codes. Also, if you have a digital odometer, the code may show-up there.


http://www.2carpros.com/forum/automotive_pictures/170934_dakota_fuel_pump_relay_1.jpg

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Wednesday, March 10th, 2010 AT 3:09 PM
Tiny
MMMCCABE123
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Thank you for your response.
Checked voltage at fuel pump relay with testlight:
Voltage to load/switch=hot
Voltage to coil side=hot (bulb on testlight was dim though?)
Replaced fuel pump relay-no additional fuses found-checked fuse box inside cab and under hood.
No codes displayed-tried on/off procedure several times.
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Wednesday, March 10th, 2010 AT 5:13 PM
Tiny
JDL
  • EXPERT
Lite blue/orange= voltage for coil side?

Red/white=voltage for load side?

On the coil side, both wires would be hot if no ground, the other wire on the coil side is ground, grounded by pcm. Do have spark at the plugs, engine cranking?
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Thursday, March 11th, 2010 AT 9:30 AM
Tiny
MMMCCABE123
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Yes on voltage corresponding to correct wires.
Yes on spark at the plugs.
Engine cranks but does not turn over.
Truck was running fine-drove to store-returned to start vehicle-cranked did not turn over-left vehicle-returned in aprox 20 mins-attempted to start again-cranked engine several times while depressing gas pedal-started-obvious smell of gasoline after starting-drove vehicle home-has not started since.
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Friday, March 12th, 2010 AT 11:03 AM
Tiny
JDL
  • EXPERT
Hi, in part of your post, you say no fuel pressure, in another part, you say, you can smell gas? I'd have to use a gage and check fuel pressure. Some of the national brand autostores used to loan a fuel pressure gage, if you don't have one. You can check for voltage and ground at the proper terminals at the fuel pump connector, engine cranking. If that checks out and no fuel pressure, I suspect the pump.
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Friday, March 12th, 2010 AT 11:50 AM
Tiny
MMMCCABE123
  • MEMBER
Hello,

Yes, I smelled gas after the truck intitially had the problem-has not started since. I have already used a fuel pressure guage-no pressure.
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Sunday, March 14th, 2010 AT 3:01 PM
Tiny
JDL
  • EXPERT
You can check proper terminals at the fuel pump connector, engine cranking. Dark green wire with black tracer is voltage, black wire is ground. If you have good voltage and ground, and no pump action, I suspect the pump.


http://www.2carpros.com/forum/automotive_pictures/170934_dakota_fuel_pump_1.jpg

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Monday, March 15th, 2010 AT 9:36 AM

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