Sat for 1+ years won't idle and really rough

[zykalz]

2002 3.0 MFI 5spd 45k miles , It was running great took it on a 1500 mile trip then took it to the store a few times then it sat for 3-4 months.

After this I went to start it and the battery was dead (duh) charged it but it did not want to start, seemed like it wasn't getting fuel.

The fuel pump was dead. fast forward a year and I have taken the bed off replaced the fuel pump and filter flushed the lines replaced the spark plugs and oil and filters also. Checked the spark wires for resistance and they are within spec. Also they are matched to the correct plugs too.

Took me a bit but I got her to start up but she is not happy.

There is a knocking sound that seems to come from the transmission area. Louder under the truck near the hole in the transmission casing.

Also she doesn't like to idle and throttle response is bad.

She wasn't throwing up a check engine light for me the first 2-3 times i started her up, now she is so I'm gona see if one of the auto stores will lend me the OBD tool.


What are some ideas?

I'm betting the code is gona be a misfire and maybe a lean code.


** I did replace the fuel also, it was old and nasty.**

 

[Rearanger]

Did you replace the fuel in the tank?

 

[zykalz]

last line in my post that i edited and added a while ago.

** I did replace the fuel also, it was old and nasty.**

 

[zykalz]

OK got the codes

P1131
P1151
P0122
P0136

So where do I start with the O2 sensor failure? I've already checked the intake from the box to the Throttle body and see nothing as far as an obstruction.

Kinda hard to take it just sitting there caused all this

 

[zykalz]

Ok so i tested my TPS correctly i think .

well i think i had the contacts backwards so the negatives are well yeah.


So with the gas all the way out my voltage read -4.12

and this was with having the top 2 wires probed. gas all the way in was -.37

with the bottom two wires probed it was -0.87 and -4.61


I slowly moved the Throttle from closed to open and back to closed and noticed a nice smooth increase/decrease of numbers, on both the above tests.

I also did an ohms test.

bottom 2 probed first gas out 2.44 (20k scale) and gas in 9.84

top 2 probed no reading for gas out and gas in was 2.46 (20k scale)

I put the gas all the way in and let up on it slowly and the highest reading I got was 17.39 which was still pressed in quite a bit.

I tested the ohms by slowly moving in and back out for both the above and the first one got a nice smooth transition the second one was smooth till 17 but the numbers moved really fast.


So is this sensor Bad?

I would think it would be, I thought throttle closed should be around 1 volt and WOT around 5 give or take.


If I did it wrong let me know so I can redo it. Thanks

 

[det107]

..........closed should be around 1 volt and WOT around 5 give or take.

The sensor should read 0.50 to 1.0-volt at idle. Open the throttle all the way and the sensor should increase voltage to 4.0 to 5.0-volts. If the TPS voltage readings are incorrect, replace it w/new unit.

*Note for the idle & throttle response: A broken or loose TPS can cause intermittent bursts of fuel from the injector and an unstable idle because the PCM thinks the throttle is moving. Any problems in the TPS or circuit will set a code 122 through 125.

I had both oxygen sensors go bad because the previous owner let the truck(not Ford) sit for awhile. I replaced both units & CEL went away.

Not sure what to make of clunking noise, maybe somebody will chime in-

 

[zykalz]

Ok so i re read the write up and figured out i did it wrong so


This is with red wire from MM hooked to middle wire on TPS.

and black com wire hooked to the battery negative terminal.


the closed position reads .89 and WOT reads 4.61

My ref voltage reads 5.03

the range from closed to open and back are still smooth, did this several times very slowly to make sure, each down then up of the gas pedal took almost a 90 seconds.

So if this is within spec now whats causing it to throw this code?

 

[det107]

disconnect the battery, wait ten minutes & reconnect cables/terminals. See if it still throws a code(s). If it does, print them here-
P.S. anything about the "clunk" ?

 

[zykalz]

I cleared the codes and after about 3-4 restarts they came back same ones as before.

the clunk is RPM based so softer and slower and low RPM and louder and faster at high.

I have used the truck in first and reverse about 100 feet each no noticeable issue with the 5spd/clutch

 

[Rearanger]

P1131 P1151

From another Ford forum:
"I found the problem. It was a deteriorated boot on the vacuum end of the PCV line where it connects on the back end of the throttle body."

Just a suggestion. Ain't the Google great!

P0122

The TPS troubles I've had all passed voltage/OHM tests but somehow when the sensor was replaced the problem went away. I'd also check the TPS adjustment before thinking of replacing it.

 

[zykalz]

Yes google is great, it also suggested that I rev up the engine cause its full of gunk and get it good and hot while its running lean and throwing itself around, if i was a complete idiot after that I would have come here and asked why it was seized.


I checked the PCV , it and the hoses are good.

I think I'm going to pull the injectors this weekend and clean them up.

Thanks