So i did my timing belt and water pump a few months ago, i got a valve cover gasket kit at the same time with tube seals and bolt seal things.

I finally got around to doing the valve cover gaskets, tube seals, and those bolt retainer, as well as valve adjustments. After putting everything back together, im getting misfires on every cylinder except 3. One tab on two separate connectors for im pretty sure fuel injectors broke, if not all 3 on the back head closer to the firewall. I did push down as hard as possible, and djdnt hear a click, even on the front 3 connectors, but didnt see them raise back up.

The car hasnt moved, the misfires started as soon as i started it after finishing. I dont see anything i missed, but i wouldnt have missed it if i seen it lol. What should i check for? I do plan on pulling the plenum off again. When i first put the plenum on, it did have a slight rock to it. But soon as i got on bolt hand tight it stopped, looks like its sitting flush from where i can see. Side question, i see people mentioning a broken TB when talking about these motors. Thought it was throttle body, but the context doesnt seem like it is.

 

The physical timing with the belt is likely ok, because you did this a few months ago with no issues.

Start with the easier issue and that is the injector connectors. Unplug the suspect connectors and do an inspection to see why they weren't seating correctly. Look for bent pins on the injector and the inside of the connector. If you have some silicone grease, a very slight coat using a q-tip on just the rubber gasket in the connector will help the connector slide on easier. The packet of bulb grease is silocone grease if you don't have some.

Check that you got everything reattached. I think the V6 has a ground on the passenger side of the valve cover that connects nearby to the engine sub-frame.

If you find the connectors are secure, then the harder issue is rechecking the valve adjustment.

 

Yea i wasnt worried about the physical timing, the valve adjustment i was very malicious about, double and triple checked everything with the valves. Whats weird, if the injectors werent working, the engine wouldnt be running with only one injector firing. Hoping it didnt damage a coil some how. But will take the plenum off and blow out all the connectors, grease them, and prey like hell its ok lol

 

Well good thing I didn't just go pulling the plenum/intake. I double checked everything, cylinder 2 coil wasnt clicked in all the way. Thats just crazy and weird that one coil will throw codes for 5 cylinders. Yet, i had the spark plug in cylinder 5 blow out, trashed the coil, trashed the threads in the head, pieces of the plug were gone, smashed up in the CC and who knows where they went, but after all that, only a single cylinder misfire code. Don't plug a coil it all the way, codes for all cylinders except one. Destroy and plug and coil, single code haha

 

trashed the coil, trashed the threads in the head, pieces of the plug were gone,
When did this happen? What do you mean trashed the threads in the head. Are they cross threaded. There is a tool to clean up the threads.

This comes with a story. A friend called saying his car had a strange noise and a misfire what could it be. I made some guesses but no luck. He never mentioned the noise started when the hood became dented somehow. The spark plug unscrewed and hit the hood.

 

mine happened a few-several months ago. Most likely factory plugs, or really old plugs. The car has 190k, got it with 125-135k, happened around 175-180k. It just randomly happened one late night when I was on my way home from my brothers, who lives an hour away/the next state iver, i was probably 25-30 mins into the drive, and just limped home. The next day i went to pull the coil and plug from cylinder 5 with different cylinders to see what the problem was, and the coil came out mangled. Went to take the plug out, and i couldnt even get a socket on it because some of the coil was stuck to it, and broken off around it. Finally got all the pieces off plug and out the hole, but the plug kept spinning. When i got it out, the whole tip of the plug was gone. Completely hollow, porcelain cracked, etc, as well as the threads in the head were pretty much gone. I got the kit to tap it and thread cert. I also used a bore scope to look at piston, cylinder wall, and valves to see how much damage was done, luckily its wasnt bad.

Crazy your buddies shot out and dented the hood/went through the coil. do you remember which cylinder your buddies was? mine was cylinder 5. Ive read its pretty common on these motors. A lot of the cases ive read were mostly cylinder 5, a couple may have been cylinder 2. I dont think ive head about any outside cylinders, always the middle, and usually 5. Idk why its mostly 5 and usually always a middle one.

 

This was a Toyota. I am at a loss to where the threads for the spark plug went.