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1992 Ford E-Series Van bad milage, low power

Tiny
DAVE32D
  • MEMBER
  • 1992 FORD E-SERIES VAN
  • V8
  • 2WD
  • AUTOMATIC
  • 78,000 MILES
Runs like it is choking all the time. Black smoke when starting and when on the road step down on the gas more black smoke. I have changed many parts. O2 sen, temp sen, manifold temp sen, egr position sen, egr, map sen, all vac lines, cap, rotor, pluges, wires, fuel filter. I have checked the grounds I could find.

What is good fuel pressure? Where is the regulator?
How do you check injectors? Is there a voltage?
My o2 sen is running at.9 volt.
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Tuesday, June 2nd, 2009 AT 9:05 PM

2 Replies

Tiny
ZACKMAN
  • MECHANIC
  • 4,202 POSTS


https://www.2carpros.com/forum/automotive_pictures/55316_92e150fuelpressure_1.jpg


KOEO=Key ON Engine OFF
KOER=Key ON Engine RUNNING

with 5.0L(302ci) V8


https://www.2carpros.com/forum/automotive_pictures/55316_92e150fuel302_1.jpg



with 7.5L(460ci) V8


https://www.2carpros.com/forum/automotive_pictures/55316_92e150fuel460_1.jpg




https://www.2carpros.com/forum/automotive_pictures/55316_92e150fuelinjector1_1.jpg



https://www.2carpros.com/forum/automotive_pictures/55316_92e150fuelinjector2_1.jpg



Your O2 sensor should fluctuate between 0.1 volt to 1.0 volt, not maintaining a constant 0.9 volts (rich). Black smoke represents rich fuel condition and will have an adverse effect on fuel economy. You are on the right direction. Start with fuel pressure and then individual fuel injector. I would also check for compression. One, maybe more cylinder is not within the specs.
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Tuesday, June 2nd, 2009 AT 11:18 PM
Tiny
GMAN97005
  • MEMBER
  • 8 POSTS
1992 E150 uses SD (speed density) EFI system, the MAP (manifold absolute pressure) sensor is dominant in SD and controls the A/F mixture, I am sorry you were lead astray and wasted loads of money chasing the problem. Replace the MAP sensor ($62 @ summitracing. Com) and have a great day
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Sunday, June 23rd, 2013 AT 12:58 PM

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