I NEED Boost... Opinions puh-lease

[Focus_Sh1ft]

No, all four plugs are getting fouled. Even though the afrs are running from super rich to super lean, they're generally on the rich side (especially in open loop). There's no way all four injectors are suddenly sticking. I'd also expect to see a slightly higher compression in one cylinder from carbon buildup.

Also, to be clear, when I run open loop my afr sensor is NOT plugged into the harness and NOT downstream. Therefore no values are being read.

Even though the ecm is ruled out, I still can't get over the nagging feeling that this is somehow electrical (I checked all fuses BTW)...

[yaris2010RS]

Originally Posted by Focus_Sh1ft

No, all four plugs are getting fouled. Even though the afrs are running from super rich to super lean, they're generally on the rich side (especially in open loop). There's no way all four injectors are suddenly sticking. I'd also expect to see a slightly higher compression in one cylinder from carbon buildup.

Also, to be clear, when I run open loop my afr sensor is NOT plugged into the harness and NOT downstream. Therefore no values are being read.

Even though the ecm is ruled out, I still can't get over the nagging feeling that this is somehow electrical (I checked all fuses BTW)...

$130 is alot for a sensor i have a spare one kicking around in my garage LOL, Should have asked man....

Im sorry to try to stick on one thing, but it sounds ALOT like what my car was doing when the ECM was gone......

Have you done a compression test? good place to loose vac is in the cylinders is a leak test on the intake passed. if this was a vac leak on the hose or cracked intake mani i believe you would get a very unpridctible idle (up and down or really high) with the car running spreay some brake cleaner or WD40 or something flamable and controlable to see if your RPMS go up when you spray suspected spots.

Another shot in the dark (im good at these but that doesnt make them useful) have you checked the condition of your turbo? possibly if its in dire need of a rebuild it could be holding up enough back pressure to screw with things. check from intake and exhaust side. also while your at it check the rest of your exhaust system or some sort of blockage (if you have a cat, check it!)

These are all the things i checked on my car. they went the cause but i had convinced myself they could be