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This is my first time posting here so I hope I'm in the right spot and following procedures. I also hope someone can help...

Short version: I'd like to find the ignitor control module and ECM on this truck. I've googled and stared at pictures and youtube videos until I'm cross eyed... no luck.

Many thanks!

John

Long Version:

Long story, but who knows what may be important. 2002 4.7, bought it used from my father-in-law who bought it new. He takes good care of things and mostly has a shop do his work. 107K miles. Timing belt has been replaced. I'd have to go look at the sticker to be sure, but I think at 97K.

Ran great for several months and a couple of thousand miles. Then threw a check engine light. I had it read and the guy said it was evap, cleared it, tightened the gas cap. Code went away. Another month or so it did it again, same thing. I replaced the gas cap with a new one, but started to worry it might be something worse.

A few weeks went by. Suddenly out of nowhere it started missing badly and the light started flashing. Drove it home very carefully. Bought a reader. Codes showed missing on 5&7. Swapped the coils with 1 & 3. No change. Bought two spark plugs and a can of seafoam (parts store guy idea). Put the seafoam in and started it to see if it would help any. Missed a little for a few seconds, then smoothed out and ran perfectly... but I was suspicious. Let it idle for a few minutes then took it for a test drive. Started missing badly after about a mile, brought it home.

Replaced the two spark plugs on 5 & 7 (probably should have done them all and will tomorrow or Friday), numbered all the packs and swapped them all. Started up and ran great. Test drove it about two miles, ran great.

Next morning it wouldn't start at all (temps in the 30s). No codes.

Thought maybe it was water or ice in the fuel, but wife mentioned it smelled of gas when trying to start it. Opened the hood... two items on the right of the throttle body, TPS and maybe IAC??? One of them is buzzing. (btw, my throttle body and these items look nothing like the images I see online of them) Disconnect either of them and the buzzing stops until next attempt to start. Did a bunch of reading and decided to check the butterfly. Filthy. Cleaned that all out. Buzzing gone. Started right up (50 degrees) ran great. Let it idle for half an hour. Running great. Test drove it... 1 mile it stalled and would not restart. Towed it home. Tried it out of curiosity when I got home-- engine cold by then, it started and ran rough for about a minute then died. p1300 only code.

Read about 20 threads on this forum and a bunch elsewhere... Found reference to this: P1300.htm of alflash.com.ua (Can't post a link on first post...) Great stuff. Step 1 (spark etc.) checked out fine. Step 2 is giving me some trouble... I can easily imagine a faulty/intermittent igniter causing this, or wiring, or ecm.....

But, I don't know where to find them. I've been looking for them and googling for them, and all I can see is a bunch of wire harness running along the firewall and vanishing at the back of the engine. Does it run back above the transmission? Around the firewall and up under the relay block and evap canister? Through the firewall and up under the dash somewhere?

A million thanks to anyone who can shed any light at all on any of this. I'm stumped.
 

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I just thought I'd update this in case further info helps, or in case someone else has a similar problem.

I replaced all the spark plugs with NGK.
I replaced the fuel filter
I cleaned the MAS

I've also looked at about a thousand manual pages, videos, and pictures.

I've come to the conclusion that the buzzing is probably coming from the throttle control motor.
I haven't seen the 1300 again, nor have I seen any references or indications as to where to find the ignitor or if it even exists.

The only codes I'm getting now are for misfires, sometimes random, sometimes a particular cylinder, no particular pattern to that. However, I've noticed that it does not misfire when the engine is cold. The best I can tell the pattern is that it starts very well when cold, idles fine, very smooth. Drives well. Then, when the engine comes up to temp and it drops off of high idle it stumbles, dies, and will not restart. If it were my old Mustang I'd figure the choke was stuck.

I mention above that none of the pictures I'm seeing look like my truck. I did find one that does: 2001 ENGINE PERFORMANCE Theory & Operation at the bottom of the first page.
 

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Additional update in case anyone cares or uses this for reference.
I checked the resistance on the cam sensor on the driver's side (where all the misfire codes were) it was in range.
Last few times I tried to start it, it would crank but not fire.
Checked spark on multiple plugs, all good.
Sprayed propane into the intake, and it would hit and fire a few times then quit. Decided probably fuel related.
Checked resistance on several fuel injectors (not all of them yet) and they looked good.
Checked fuel pressure, 38 pounds exactly what the book says it should be.
Got a NOID light and checked all 8 connectors, all show light pulses. (Had a hard time getting them off, finally figured out a pair of needle nose pliers at 12 and 6 o'clock positions on the connector pulls them right off.)

So, it has fuel pressure, spark, pulse to the injectors. My best guesses at this point are injectors not firing even though they have a pulse, or so badly plugged up no fuel is getting through. I guess timing could be a possibility too.

I'm debating between taking the injectors out and inspecting them vs. giving up and having it towed to a Toyota dealer. Given my past experience with their prices, I'd guess the truck is totaled if I go that route.

Any suggestions from anyone would be welcome.
 

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Cant help you with your problem but there was a thread on here about someone having lots of problems and it turned out to be the injectors. See post #4 below.

 

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Cant help you with your problem but there was a thread on here about someone having lots of problems and it turned out to be the injectors. See post #4 below.

Thanks. I guess next step is to pull the injectors off.... Too cold for it today, but as soon as it warms up a bit I'll try that.
 
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