I was getting a P0325 error, so I ordered Toyota knock sensors and harness, plus a Valve Cover Gasket kit from Rock Auto, and tore down the top end of the engine.

My truck has a TRD supercharger, for the record.

I'd never done this job, so I carefully followed a great forum DIY here, as well as a Timmy the Toolman video. I did everything by the book, and took my time.

Put it all back together, re-filled coolant, checked everything was shipshape and cranked her up.

She turned over twice then stopped. Wouldn't even turn over after that immediately. If I let it sit for a minute it will crank once then stop.

It feels like the starter wants to turn but there's too much resistance, like somehow the engine timing is completely off or there's something jammed in the crank or something.

Scangauge is showing the original P0325 plus two new codes: P0100 and P0110. UPDATE: I think the P0100 and P0110 were because the MAF harness wasn't back on. :\

Any help is much appreciated. I really, really don't want to have to tear this back down.

UPDATE #2: So, after several tries of just cranking once then stopping, I posted my original thread. Then, I went back out and tried it again, and it actually starting cranking like normal, but never firing up. It doesn't even sound like there's ignition at all.

I'm wondering if somehow I didn't get the fuel rail right? Or maybe the coil packs? I've checked them all and they appear to be solidly plugged in.

I remember a while back, someone removed/reinstalled their TB and got the vacuum and coolant lines on it reversed and hydrolocked their engine so it couldn't start.
I'd pull the spark plugs to check. It shouldn't have hurt anything; the starter isn't strong enough to cause damage if hydrolocked, it just won't start. You need to evacuate the water for the engine to turn over.

Youd definity feel that 'resistance when starting'.

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Go back and carefully look for something you left unplugged, such as a vacuum line, or a ground.

Smell fuel?

At first there wasn't much fuel smell, but after I plugged in the MAF harness and cranked for a while, pumping the gas pedal a bit (I grew up with carburetors... hard habit to break) there was a pretty strong fuel smell. I think maybe it flooded.

I've been letting it sit for a while. I'll go try it again and if it still won't start I'll pull a plug and see what it looks like.

Not long ago I replaced knock sensors. I bone headed the injector connections and swapped 1 and 3. Super easy to do it actually, like others have said check thos connections... injectors are really the only things on the truck that can get swapped accidentally. All others have unique plugs.

Not sure how that could have happened... the injector plugs kind of line up straight in a row with a fairly short leash from the main line. How do you swap 1 and 3? I'm not saying you're wrong, I just need more info to figure out if that's what I did?

for me when i get into a situation like this i take a break have a drink and then double check everything throughly and it almost always is something I missed or hooked up incorrectly.

Well, I'm on track for the "have a drink" (or two)!

I just pulled the EFI and pulled all the plugs out. They were all soaked with fuel, so I guess that eliminates gas as the problem... at least the complete lack of fuel is not the problem. Still possible I somehow screwed up the positions.

In any event... Not even sure how to check for spark with coil packs? Can you do the old plug to conductor test and look for a spark?

So, let everything dry out over night, then put the plugs back in, reconnected all the coils and plug wires, reattached the intake, and tried again.

This time it seemed to want to start, would actually turn over occasionally. Kept cranking and finally it started up! Ran super rough for a couple seconds and then smoothed out a mostly, however... White smoke pouring out of the exhaust, like thick, thick white smoke. And it doesn't stop.

So, what did I do wrong? I used brand new Toyota manifold gaskets. I doubt my head cracked while I was doing the job??

Help?

Also, now I see coolant dripping off the bell housing of the transmission.

What could I have done wrong here?

When I first pulled the supercharger off I had not drained the coolant and I heard it suddenly pouring out somewhere in the back of the engine... So, I quickly drained it. I figured it was coming out of a hose I disconnected, but maybe not. I'm at a total loss. I guess I'll just have it towed to my mechanic and see what he says.

This is really easy to screw up. Re-check carefully.

But the white smoke suggests coolant in cylinders. I'd pull and recheck every hose going to Throttle Body and Plenum. Trace each one so you are sure its what it is supposed to be.

It sounds like you may have done this ^

^^I'm hoping I accidentally swapped the hoses at the throttle body. I could really use a good schematic of which hoses go where.

If that is indeed the case, I just blew a bunch of antifreeze through my supercharger. What are the implications of that?

I was thinking the same damn thing.