2008 won't start after timing cover re-seal

Re-sealed the timing cover on 08' 4.0. Truck tried to start at first, but no joy. Now it will fire a bit, as though not getting fuel. I noticed that the butterfly in my throttle body wouldn't move when it was off the truck. I tried cleaning it a bit, and noticed that the butterfly wouldn't move under light pressure. Didn't want to force it. Is that normal? Truck was running fine before re-seal. Thanks in advance for any help.

 

Just to post some additional data. The truck was apart for about 10 days with the battery disconnected. The throttle body sat for the same period. Just curious about the throttle body. Should one be able to move the butterfly with finger pressure? I found it odd that I couldn't when I was cleaning it, but since there weren't any problems prior, I let it go. Now I'm thinking it's causing a problem.

 

If the butterfly is stuck that is definitely an issue.

 

Don’t finger open a fly by wire throttle.

 

He should be able to turn on the ignition and press the throttle to open the butterfly in the throttle body.

 

What he said^^^ there's a motor controlling the butterfly.
I don't know this for a fact, but if you were to plug the throttle body back into the harness then turn the truck on, I would think that it should move when you or someone else presses on the gas pedal.

 

You can push the butterfly open but it does take a bit of force, do so slowly.

But before trying to push it, plug it in and turn the truck on (doesnt need to be running) and have someone push the gas pedal) thing should move.

 

This!!

 

Thanks for the replies. The truck acts like its not getting fuel. It fires briefly, but won't start. It's why I thought I had a possible problem with the throttle body when the butterfly wouldn't move. Not familiar with FBW. Guess that's how they are.

 

Vacuum leak?

 

Crankshaft position sensor?

 

That's a really good guess since OP had the timing cover off. It should throw a code if there's a problem.

@shbop have you scanned for codes yet?

 

when you pry the cover off did you use the cams gears? if so you probably bent the part that the sensor reads
ju

 

Yes you can open the butterfly by hand, i do it all the time. If it is stuck in the "mud" it needs to be cleaned. If it is stuck closed it will absolutely cause a start/quickly stall situation

You're on the right track with the throttle body.. clean both sides of the plate and the whole bore. I like to remove them from the car and clean them on the bench if possible

Any time a battery is disconnected, it is common for the throttle plate to go back to its original at rest position. If the bore of the TB is dirty w/carbon the plate gets stuck/buried in all that crap and it will not flow enough air to sustain an idle. The engine will start and stall quickly

 

Just had a chance busted out my scanner. Sure enough: P2112 My notes show that to be throttle position stuck closed. Can't really understand why it would happen from sitting on the bench for 10 days, but I had a feeling this was the problem. I hit the top and bottom of the butterfly with a little PB Blaster. Going to wait until after dinner, and try the pedal again. Thanks to everyone for the replies. I've got my fingers crossed that this does it.

 

No joy. Had my wife operate the accelerator. No movement. Anyone have any idea why these stop working? Has anyone drilled out the rivets and had a look inside?

 

You might want to use throttle body cleaner.

Isn't pb blaster a rust penatrant?

 

Yes, it is. It's hard to imagine that the butterfly seized while on the bench, but that's what it seems happened. Toyota and everyone else want a fortune for the throttle body. I"m getting ready to operate on mine.

 

Just to finish this up for the next guy. These FBW throttle bodies have to be re-programed. Did mine, and the truck fired right up. Damn, you learn something new every day.

 

What was the process to reprogram?