2.9L & 3.0L V6 Tech General discussion of 2.9L and 3.0L V6 Ford Ranger engines.

Wont start

  #1  
Old 06-09-2019
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Wont start

99 ford 3.0

Truck was idling in the driveway and started bogging down for about two rotations and then went back to normal. then the truck started bogging down the same way but actually stalled out. hitting the gas actually seemed to make it worse.
fast forward to now the truck will not start. turns over but no crank.. thee is fuel to the rail and spark and i think the maf is working.

before this the only real problems i had with the truck is that it started to loose ac to the vents while accelerating or under a load.
Truck did have p0401 &403 codes..I replaced the EGR pressure feedback sensor, EGR control solenoid and EGR valve when it went down but No succes. after checking a little more i thought maybe it was the IAC. replaced and it cranked for a little bit longer ( got a couple put puts out of it but quickly dies out) i have noticed a squeal which i believe to be the cam position sensor/synchro but im wondering if this would cause these issues? hopefully someone here has some insight cause im very new to the ford worl and have ZERO idea what else it could be. any help is greatly appreciated.

 
  #2  
Old 06-09-2019
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Welcome to the forum

"before this the only real problems i had with the truck is that it started to loose ac to the vents while accelerating or under a load"
This is caused by a leak in the Vacuum system that controls the Vent doors in the cab
The leak is usually in the engine bay, black plastic vacuum line that runs from firewall to Vacuum reservoir ball on the passenger side.


In some years Ford had 3.0l computer software that would cause a No Start if Cam sensor wasn't working, not sure about 1999
Cam sensor drive is the same as oil pump, so no cam sensor pulse = no oil pump, so no start, but........cam sensor failure was too common so they dropped that after a few years

I would do a 50/50 test
Remove air tube from intake manifold
Spray gasoline or ether(quick start) into the intake, you can leave the tube off if fan doesn't hit it
Try to start engine

If it starts up and then dies, Spark is working but no fuel from the injectors
If it doesn't start then no Spark
50/50 instant results and now you know where to check further
 

Last edited by RonD; 06-09-2019 at 05:32 PM.
  #3  
Old 06-09-2019
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Originally Posted by RonD View Post
Welcome to the forum

"before this the only real problems i had with the truck is that it started to loose ac to the vents while accelerating or under a load"
This is caused by a leak in the Vacuum system that controls the Vent doors in the cab
The leak is usually in the engine bay, black plastic vacuum line that runs from firewall to Vacuum reservoir ball on the passenger side.


In some years Ford had 3.0l computer software that would cause a No Start if Cam sensor wasn't working, not sure about 1999
Cam sensor drive is the same as oil pump, so no cam sensor pulse = no oil pump, so no start, but........cam sensor failure was too common so they dropped that after a few years

I would do a 50/50 test
Remove air tube from intake manifold
Spray gasoline or ether(quick start) into the intake, you can leave the tube off if fan doesn't hit it
Try to start engine

If it starts up and then dies, Spark is working but no fuel from the injectors
If it doesn't start then no Spark
50/50 instant results and now you know where to check further

Started right up with the starter fluid so its gotta be the fuel. aside from checking the fuel injector resistance is there anything else i should be checking?
 
  #4  
Old 06-09-2019
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When you turn on the key you should hear the fuel pump in the gas tank run for 2 seconds, its not quiet, but it only runs for 2 seconds

Turn key off and on as much as needed to either confirm you do hear it or don't

In the engine fuse box is the Fuel Pump Fuse and Fuel Pump Relay

You can go here and download owners manual to see where those are located in the fuse box: https://www.ranger-forums.com/genera...1-models-3747/

In the passenger side kick panel is the inertia switch, small black box with big RED BUTTON on the top, if its been "tripped" the button will be UP, press it back down to reset
Inertia switch cuts power to fuel pump in an accident, if the truck was ever in an accident the switch may not have been replaced, so it can "trip" again any time

To check injectors you just need to see if the RED WIRE at any one of the injectors has 12volts with key on, if not then PCM Fuse may be blown, also in the engine fuse box
No need to check OHMs, if you have a single cylinder misfire then you check OHMs, but pretty long odds on all injectors failing at the same time


The Cam sensor times sequential fuel injection, but long shot it would cause no start, not no shot, long shot


Usually when 50/50 test results in a startup and die, the fuel pump is the problem.
 
  #5  
Old 06-10-2019
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Ok Iíll double check this list. Initially I thought I heard the fuel pump but Iíll double check. I didnít think it would be the pump cause there is fuel at the rail. I also checked the inertia switch and itís good so Iíll start chipping away at the other possibilities and check back in!
 
  #6  
Old 06-10-2019
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The engine computer(PCM) starts spark and fuel injectors when it gets the Timing Pulse from the crank sensor
This is happening because engine starts by adding fuel manually(50/50 test)

So you know crank sensor is working, crank sensor is really the only "sensor" needed for PCM to start and run the engine

Yes, retest for fuel at the Rail, should be 50+ PSI on a 1999 Ranger, so LOTS of pressure

To test if injectors are working, crank engine over a few times then pull out any spark plug and see if its tip is WET with gasoline, it should be, then use a match and light the tip, so you know it is gasoline, lol.

Unplug the 3 wire connector on the TPS(throttle position sensor), opposite throttle cable/linkage on upper intake
A shorted TPS can turn off fuel injectors

More that a few people have gotten "bad gas" over the years, and get a no start

Bad gas is gasoline with too much water in it, all gasoline has some water, from condensation in storage tanks
Water is heavier than gasoline and doesn't mix with gasoline, so you wouldn't notice getting "bad gas" just after you fill up
You would notice it after vehicle sits overnight or a day or two, that gives the water a chance to settle to the bottom of the gas tank
And the fuel pump picks up fuel from...................the bottom of the tank, so you just get water and so no start, good pressure, but no start, lol

Ethanol does mix with water, bonds to it, and will still ignite when bonded to water.

This is a long shot as well, but needed to be mentioned
 
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