Im working on a lariat that cranks but won't start. It's had tons of parts thrown at it before I got it... New pumps, ecu, distributor, egr, O2 sensor and more. I've got spark and fuel at the rail. The plugs are black even though they're new so it's running rich. The owner said the guy who was working on it before me said the injectors were just sitting open.... I don't really even know how that could happen other than an electrical issue. Injectors are new too. I replaced the MAP because I was getting a code 22 but it didn't fix anything. I also fixed some exposed wiring. I still get the 22 but then a pause and five blinks in succession which makes no sense to me. Help please!!

 

Let's take one thing at a time.

IF,,,,,,,,,,,,,we are sure the injectors are sitting open, new ones are going to be needed again, let's hope that is not the case..
It is one thing to suspect there is an excess fuel condition, the only way to verify that is to remove a couple spark plugs , clean and dry them ,then reinstall them and see what happens when you attempt to start the engine. If it does not start or attempt to start remove one of those plugs again and see what it looks like. It will be either wet or dry, and we need to know which result before going any further, can you do this?

 

Injector is dry!

 

Could you mean the plug is dry?
If not , I don't follow your reasoning
.Please explain, thanks.

 

Yeah haha I'm an idiot... Just got excited. Plug is completely dry after cleaning and starting.

 

That would most likely tell us there is no fuel getting into the cyls.

For starters, you might check all the fuses.

I am somewhat concerned because if full power was applied to the injectors and they received full all the time ground for whatever reason , those injectors get burned out and replacement will be necessary again.

There apparently is more to this than we presently know and some very basic testing will need to be done to determine where we stand.

 

Yeah this truck has had a lot of better mechanics than me work on it and it was running badly but now it's not even doing that. All the fuses in the driver's side fuse box are fine... Are there any others hidden anywhere?

 

Would spraying some starter fluid into the intake manifold help me determine if it's a fuel issue? Im not gonna lie, the other guy saying it was a flooding thing and the black plugs made me think it was too much fuel/ too little air. I really should have checked earlier. Thanks!! I feel like I'm getting closer now.

 

If,,,,,,,,,,,, it is getting too much fuel, spraying starting fluid will not help because the plugs are already wet with fuel and the mixture is just too rich to start.


Removing the injector is a bit of work and requires new O rings on reinstalling them. We don't want any gasoline leaks.

What you might consider;
Check that each injector has power to it with the key on.
The ECA provides the ground to open the injector and allow fuel to be injected into the cylinder. We need to know if that ground is being applied when the engine is not being cranked over. If it is,, there may be a wiring problem or the ECA is faulty.
PLUS we don't know if anyone applied full power to the injectors longer than a few MILLISECONDS which if they did, the injectors are cooked..

Unfortunately, when many people get loose in fuel systems without being aware of the pitfalls, anything can happen.

 

I probed them and they are getting 12 v. But.... I watched a video and it said when you are on the control wire and you unplug the connector to the injector, the power will drop to zero. No matter which wire I probe, the reading is 12 v, plugged or unplugged. This is true on all injectors. Not sure what, if anything that means.