Bronco_addic
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- Joined
- Aug 12, 2016
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I have a 1988 bronco with a 5.0 EFI. I just recently rebuild my engine and ever since I first fired it up i can not get it to run right. I did the cam break in on my first start up and put a vacuum gauge on it and did a compression and leak down test to be sure none of my cam lobes had flattened. my engine just will not run right, it takes 2-3 10 second cranks to get it to start. when it does start it runs like total garbage and shutters and misfires like crazy. I have tested everything and im at a total loss at this point. ill post all my results below. if you need anymore details i can provide them. i also found allot of gasoline in my oil.
FUEL
SPARK
FUEL
- fuel pressure = 135-145
- all 8 injectors brand new and clean
- clean fuel rail
- new fuel pressure regulator
- new (inline) fuel pump
- new (in tank) fuel pump
- 12-13 volts to all injectors
- all injector plugs are pulsing with a noid light
- new fuel filter
SPARK
- new ignition coil
- new plugs
- new wires
- new cap
- new rotor
- ignition coil sparks
- all 8 cylinders at 150-160
- leak down test, none are leaking
- Steady needle with a vacuum gauge so valves should be okay
- timing set at 10 degrees BTDC
- 12 inches at idle with steady needle
- smoked and no leaks
- retraced vacuum diagram and all lines are there and in place
- map sensor = good
- TPS = good
- IAC = good
- O2 = good
- ignition module, my ignition coil sparks so i assume that means that my module is good?