I recently replaced my stock injectors with the Flamethrower injectors. Ever since the install the truck has been running rough like it is missing a cylinder.
I've checked the injectors at least ten times to make sure they are all sealed up right. They are not leaking and I am confident that they are in right. I have also replaced the spark plugs, plug wires, and distributor cap and rotor.
What else could be causing this? BTW the Engine is a 3vze.

 

did you disconnect the battery during the install to reset the computers fuel trim tables? the flamethrowers are a higher flow rate than stock. try that, at least its an easy thing to do to rule out.

 

I disconnected the battery for 30 seconds or so to clear a code but I did not have it unplugged during the install. How long do I need to have it unplugged for?

 

Sounds to me like you have crossed one of the injector wires. You may have one cylinder crossed with the other cylinder causing fuel to enter at the wrong time resulting in a dead cylinder.

 

30sec would probably do it, but try it for 15min or so

 

Don't think so, I was paying close attention to that because I already took the thing apart once to check for that.

 

Well if that isn't it and unplugging the battery doesn't do it then I'd say you have a faulty injector. I hope for the sake if flamethrower that you don't but I guess it could be possible. I'd suggest breaking out a ohms meter and checking your injectors. If everything checks out then.... Well yeah it's gotta be faulty.

 

When I installed mine, the fuel cut out for the first few runs. After a day or two the ECU adjusted and ran great. Give it a little time to adjust, every time you pull the battery terminal it resets.

 

I had a similar issue. Ended up being a bad injector. You can test them on the bench by hooking up 12v to the leads. Power on and you can hear the injector click open, power off should click closed. No click = dead injector. I would contact the company, he sent me out a couple replacement injectors very quickly. Could also have one of the electrical adapters not hooked up, or a bad connection.

Also, you can test which cylinder it is by pulling spark plug wires at the distributer. Most of them should make the engine run a little rougher, as you would be down 2 cylinders. Whichever one is the dead injector should have no change in sound/vibration.

 

I have a bad injector, Flamethrower, bought from injectordyne.
It's stuck open.

 

Ya thats who i bought mine from. Im going to check them with a jumper like michael beckman said when i get home. I have the feeling thats what it is.

 

I just talked to him on the phone, he's sending out another set to me today.

 

Good guess, but wrong. All the injectors fire at the same time. http://www.autoshop101.com/forms/h22.pdf Odd sounding, but true.

P.S. Don't bother bench-testing injectors; you can hear them opening, when installed, and with a running engine. You just need a "stethoscope." For injectors, I recommend a piece of 1/2" (or so) vacuum tubing stuck in your ear. Or one of these, if you're a tool-guy: http://www.harborfreight.com/mechani...ope-41966.html

 

Yeah, thats how I found mine. However, you can't access injectors 1-3 as the plenum covers them. Luckily mine was cyl #6

 

So I jumpered the injectors and heard a click on every single one. I measured voltage coming to the injectors. I did find a large vacuum hose with a tear in it. I replaced that. I put the thing back together and started it. It seemed to miss intermittently, but eventually the miss started to go away and it idled nice. I went for a test drive, it started missing again. It was missing on the #5 cylinder. I shut the truck off and started it again and it sounded good but as I was standing there listening to the exhaust I could here the miss starting to come back again, then sure enough it turned into a solid miss. So I shut it off and started it back up again and I saw a big cloud of steam of something shoot up out of my engine compartment. The hose that connects to the pcv valve had blown off. I am really confused now.