It was a Flex Fuel Module that was the same. Knock on wood. I think it was an early model when they transitioned - I found one in the bottom of a 2002 Ranger and compared the part numbers and they came up the same part.

I am thinking it is the camshaft sensor now since it is acting like it wants to start, but then chokes like it is missing something. So I am going to put that on. She blows black smoke, which gives me hope.

If this doesn't work - it's going to the bone yard. Nice truck - just can't get a finger on the issue.

 

So I am losing it. I find in the back of the intake manifold a connector for a hose that goes no where. Anyone know what it is for?

 

Put it on TDC and put in the Cam Sensor. Now I have to let the battery charge to see if that is going to fix a problem.

Put it on

 

Did you find out what that hose was for?

 

Nope - it is there naked. No schematic, picture or anything else has anything on it or referring to it. On top is the Brake Booster.

 

It is somewhat alive - runs rough. Still getting the P0176 and now - p1137 error codes. Now to replace those items and maybe it will behave. Replaced Cam Synchronizer (hopefully I put in in right) and started her. She ran for about half an hour very roughly - which I think is O2 Sensor related.

 

O2 sensors are only used after engine has warmed up a few minutes, so if it ran rough on cold start then not O2 related, if it ran smooth on cold start and then started to run rough after say 3 or 4 minutes then "maybe" O2 related

O2s need to be heated above 650degF to work, so computer ignores them on cold start(open loop), once coolant temp sensor shows 150degF computer will look at O2s to see if they are showing voltages that "make sense" and will then start to use them as feedback for air/fuel mix(closed loop)

 

Now to figure out where this goes... The top goes to the brake booser - the bottom - I have no idea.

 

PCV Valve most likely, those were the two larger vacuum hoses on most engines

If PCV Valve is hooked up to another larger port location then just cap the other one off

 

Now the last thing

 

Pretty steady misfire

And you have check the firing order at the coil pack AND the cylinders?
Need to do it 3 times and then a 4th time to make sure

"I KNOW THE FIRING ORDER IS CORRECT!!!"

Is always said just before "OOPS, nevermind, I found the problem"
Been that way since the first distributor

 

Checked it and did them one at a time. Thinking of taking off and swapping number 5 and 6 to see what happens.

Went by the schematic on the ignition block and in Haynes to be sure.

 

Maty not have been at TDC installing the synchronizer so will do it again tomorrow.

 

Ok - re-did the synchronizer. Still acting like it's missing. What to go after next? Checking Injector harness?

 

Now I did find where that hose went. In the bundle of vacuum tubes there is a elbow (hidden if you don't watch it) that plugs into it. I just so happened to stumbled on it when I was flipping the sunchronizer. So it is a vaccuum that runs the yellow side of the house. The red goes right out of the vacuum regulator.

 

So I am guessing at this stage in time after doing the test in flipping the cylinder fire We are looking at a bad PCM

 

QGF0 is the code on it. Don't know what matters and what dies not.

 

Your problem will be PATS, passive anti-theft system
1999/2000 Rangers have a separate PATS module above glove box, its "Paired/married" to the computer and visa versa
So you can't just swap computers
Have to swap computer and PATS module to another "matched" set, or find a programmer with Ford Software that can come out and "remarry" new computer to current PATS module
Not sure if Forscan software can do that

Things you need to match on any computer swap is
engine size
egr or no egr
manual or automatic transmission

2wd or 4x4 doesn't matter

And because its a 2000 only a 1999/2000 computer will work
So you would need to find a used 1999/2000 computer WITH its PATS module and at least 1 matching PATS key with the set
And of course matching engine, egr and transmission type

 

So to recap I got the same computer for a 2000 Ranger with the same part number and code, so it should be Kosher when it hits the reprogrammer.

On the flip side, I want to go into the engine with the old - perhaps bad - computer and check the fuel injectors again. I was zapped with all of the plug wires (spark on all of them) so I am thinking the computer is not sending the signals right to the engine. I think it might have been something that was not fixed when this computer was put in (it was a blank from Ford) - but I don't think it was programmed right and it may have been bad.

Is that a good assumption to make?

 

Not sure I know what you mean

The computer uses the crank sensor to time spark and fuel injectors
Each coil sparks 2 plugs at the same time, a waste spark system

Fuel Injectors are run as Batch Fire on start up, on a V6 that means 3 injectors(1 on one bank and 2 on the other bank) are opened at the same time and then the other 3 on the next RPM, so similar to the way a carburetor worked, keeps the intake full of air/fuel mix for any cylinder to suck in on its intake stroke
After start up computer will use Cam sensor(if it matches timing of crank sensor) and will switch to sequential fuel injection, each injector opens as its intake valve opens, this saves on fuel over Batch fire, less fuel is lost coating the runners and head ports

Unless someone loaded 4cyl software there shouldn't be much difference between 3.0l and 4.0l software, just get lean or rich codes

 

Yeah - I get neither - I get the p0176 code on it regular. The rest of the time it just runs as rough as you see there and throws no lean/rich codes. I would like it to just run like a normal engine. I went out and checked the voltage on all the injector connectors and got 12 volts.

Perhaps not grounding the injectors properly? I dunno - it is running crappily now. When you replace everything, the only thing left is the one item that has not changed. That is the PCM.

The code on it was QGF0, which I bought one that had the same code and part number. It is a matter of finding out if they did put in the wrong computer and that what has caused it to run horrid. It ran a little rough when the original engine was in it - but taking all things out and putting new parts in seemed to have made it run worse.

 

Set put the new computer in and it seemed to be functional but the pats of course turned everything off but I had epiphany last night said you know a better check the gas

 

So I had an apifiny And is said check the gas so I did this is what it looks like

 

I wanna did put the old computer into test again

 

Not sure what that is but gasoline it is not