I have 2014 Chevy Equinox that recently starting burning about 2qts of oil a week. I read up on the pcv system potentially causing this and cleaned the intake manifold with throttle bottle cleaner spraying the pcv valve as well. I then for some reason thought it was a good idea to spray the valves with valve cleaner. I let it all dry for a few hours then Put everything back and car starts rough and dies shortly after. Code says fuel injectors are open. What damage may I caused and where do I start. I’m certain every thing is back together right.
While thinking this over a bit, did you remove the intake manifold and does spraying the valves mean you shot cleaner into the cylinder head ports?
What DTC(s) is involved in reference to the open injectors?
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Intake manifold was removed and yes I sprayed down the ports? I took out the spark plugs and turned the engine over by hand it was easy. Some of them were wet with a dark colored liquid can’t remember which ones but I will check again today. Then put a little oil down the holes and put the old ones back in to see if it would start but did the same thing. I’m thinking the open injector issue is causing to flood. Can it still be hydrolocked I would think whatever I sprayed in there has burned out it has ran for as long as 5-10 seconds and I have prolly attempted starting close to 20 times now. What would cause stuck injectors or is my problem bigger here?
Yes, injectors stuck open can cause flooding and possibly hydrolock. What I was getting at is whether the injectors are stuck open or whether there is an open circuit on them. An open electrical circuit would cause them to remain closed so that is why I asked about what codes are involved.
If all of the injectors are stuck open because grounds are provided for all of them then I would have to think about that a bit. The only time I have run into something like that was on a Volvo and it was caused by a fault in the ECM. I’m not ready to blame it on your vehicle just yet.
Anyway, got things to do and will think about this today. Maybe someone else can weigh in on it also.
I’ve thought about this on and off today and have not come up with a cause. If the injectors are not pulsing and are staying open all the time this should mean that the ground circuit for each injector is being grounded inside the PCM.
One injector I could see a pinched wire leading to ground but not all of them. I’m still a bit murky on this as you say open injectors and refer to the engine running for 5 to 10 seconds on whatever you sprayed in there. That comes across as injectors stuck closed and running briefly on aerosol carb cleaner. (?)
My suggestion at this point is to check for power and a pulse at the injector plugs with the key on. This is done more easily with the use of Noid light if you do not have help.
It’s difficult for me to think of a situation where every injector would be grounded constantly; short of that Volvo incident I mentioned and it was an anomaly.
What’s the code number?
Which motor? 2.4?
Can the system really “see” if an Injector is open? Or is the system noting an Open Circuit to the injectors?
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I’m pretty certain it’s the later.
Knowing the code would reduce the guesswork.
Another long unsuccessful day. took intake and fuel pump back off. Saw an injector sensor was showing bare copper wire. Put electrical tape over it and plugged it back in. after cranking the engine over by hand it cranks over easily and air is coming out of the cylinders. I changed the oil and put some Lucas oil stabilizer in as well. After attempting to start the engine will no longer run rough and die it won’t start up at all. It’s showing more codes too
P0202
P0203
and the original code is P0192
The p0192 says the fuel pressure (at the fuel rail) is too low.
The p0202 is a problem w/ the cyl 2 injector circuit. p0203, same thing, but for cyl 3, both say the circuit resistance is too high (open circuit).
One simple thing that might cause this, the injector grounds are not making good contact with the vehicle’s ground. There’s usually a ground cable or set of cables that connect the cylinder head with the chassis and/or the engine. Double check that cable is properly connected. You may have inadvertently disconnected it when doing the first part of the job.
If I think the pcv system is causing oil usage on my vehicle, usually the first thing I do is the standard suction test for the pcv valve, and if the test shows it is bad, or inconclusive, I just replace the part with a new one. Throttle body cleaner isn’t part of the first step for this sort problem, first b/c it is unlikely to help, and second, as it introduces another variable, and can introduce new problems you didn’t have before.
I expect the reason it isn’t starting is b/c the injectors aren’t pulsing, and that’s probably some sort of minor electrical connection problem. I should remind you that an important part of Ray and Tom’s diy repair mantra (part 3) is: don’t make the problem worse, or introduce more problems.
Do you have a multimeter to check voltage and resistance?
PO 202 and 203 are issues with the injector wiring. If the ground leads on those 2 are pinched or damaged somehow which leads to their being grounded all the time those 2 injectors will spray constantly. That could lead to fuel pressure issues as could the fuel pressure sensor or a fuel pump deciding to croak.
My suggestion (meter involved) is to check for power at the injector plugs on one lead and probe the other lead to see if it is grounded.
It may not seem like it but the cause of this problem is likely something which can be easily sorted out. Sort out the injector issue first and then worry about the fuel pressure problem. No need to panic yet.
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Thanks for the help this far. I am going to go buy a multimeter today and see what’s going on.