2007 Prius - Misfire Cylinder 1

injectors

 

Replaced the coils with what brand, from where? Aftermarket coils can be DOA, "OEM" ones from Amazon or Ebay can be fakes. Ditto for the plugs. That said, there is only a 25% chance that a bad component would end up on the same cylinder. So I agree with the previous post, a bad injector is the next thing to consider. After that check the wires to the injector and coil pack.

However...

Better to start by swapping parts between two cylinders. If the problem moves with the part you have found the problem - only then buy a replacement. Replacing the plugs with new ones is a small enough expense that there is no harm in doing that, as along as you are confident the plugs are the right type from a reliable source. Coils and injectors are more expensive, better to prove one is bad before replacing it.

 

From yesterday

 

consider a rebuild service for the injectors. It's much cheaper than OE replacements, and a rebuilt Toyota injector works very well compared to "discount aftermarket."

The downside is car downtime while waiting for the injectors to be mailed there and back.

 

Hopefully that's not the Chinese version of Denso

 

You might be on to something there. That option didn't exist the last time I had needs, so I paid the $25-30 per injector and the shipping and did it that way.

So I know an OEM injector can be rebuilt to proper standards, I just don't know if those particular rebuilders are doing it right.

 

You're right about the injectors. I was looking at new ones a year or so ago, and seem to remember RockAuto.com offered the rebuilt OEM injectors at a pretty fair price.

 

When you come to the part of the repair manual that seems to be micromanaging you and telling you how to fit an O-ringed fuel injector into the fuel rail:







Don't brush it off and think "I don't need no stinking instructions to put an injector into a fuel rail."

Follow those instructions like the success of your job depends on it.

If an O-ringed injector end doesn't get seated properly into the fuel rail, besides the risk of a leak, you have a risk that you bend or crush the injector when you tighten the rail down onto the head. Then you're out the price of the damaged injector(s).

 

Belated comment: my first thought was "mailed"? Googled "business doing fuel injector cleaning in Greater Vancouver", one of the first results:

Gasoline Injector Testing & Cleaning in Surrey - NW Fuel

This page (about halfway down):

Fuel Injector Testing in Surrey - NW Fuel Injection Services Ltd.

shows gasoline injector "ultrasonic cleaning and testing", prices from $32.50 to $52 (CDN), 48 hour turn-around.

There's also mention on the site: no charge if injector deemed unrepairable.

Attached is from 2nd Gen Repair Manual, a bootleg pdf. Chap's second pic is in it, the first pic looks to be an image scan from some other document.

 

The first I scanned from the gen 1 repair manual, which I have in dead-tree form.

Yeah, starting with the injectors in the head is pushing your luck. It takes care and finesse to get the O-ringed ends properly into the fuel rail (not cockeyed, and not with the O ring displaced from the groove, the two flavors of 'WRONG' shown in the gen 1 picture).

I can't recommend just plopping a rail down on four injectors stuck in the head and cranking the bolts down and hoping for the best. Leaks or irreparably-deformed injectors could be your reward.

 

Some are more cavalier around possibly-spraying gasoline than I am.

If I have installed injectors, I will leave the car off and jump power to the fuel pump and carefully check for leaks then.

Only if there is no sign of leaking then do I proceed to starting the engine.