mike0000

Alright guys I'm new here and looking for some help. I got a 93 toyota pickup 22re. Truck runs very rich when warm. Loads up on gas when crawling in the woods. Truck runs great when just driving around normal. Any suggestions. I have been battling this problems for 3yrs. Things about to get a ˟˟˟˟ing carb swap.
22re was fully rebuild 1 yr ago. Has intake. Exhaust. Header. Crawler cam. Flame thrower injectors. Egr delete
Parts I have replaced trying to fix this problem..
Coolant temp sensor for ecu
Air flow meter + adjustment
O2 sensor
Cold start injector
Tps + adjustment
Full tune up
Timing is correct
All vacuum hoses deleted
Fuel pressure regulator
Fuel pressure vsv delete
Idle adjusted
Idle air speed adjusted

osv

you realize that tweaking the air flow meter can make it run rich, right? put it back to stock.

why take out the fuel pressure vsv?

i personally would not run the flamethrowers, do you happen to have any stock injectors to swap out, see if it makes a difference?

mike0000

I've been going more lean with the air flow meter

Fuel pressure vsv was broken when I bought the truck . I've seen several people remove it online and have no problems suposidly. My vaccum hose goes straight from the regulator to the three ports on the intake.

I do not have the stock injectors. 2 of them were leaking gas from the seam on them. Thats why I replaced them. The flame throwers are supposed to be stock flow. I'm looking for an OEM set used or new. To swap back in

osv

it would be nice to know what the fuel pressure was... you are using a stock toyota fuel pump, in the tank?

i wonder if it's something weird like the cold start valve leaking fuel into the intake manifold.

is it throwing any codes?

osv

it looks like that's what 4crawler is recommending? https://www.yotatech.com/forums/f115...re-vsv-158771/

that reminded me of how we had a post awhile back, someone had somehow hooked a vacuum line up to a fuel source, lol

man, talk about running rich, lol

mike0000

Yes the pressure regulator is hooked up just like that one in the picture

As for the fuel pressure I'm not sure. It has the stock pump hooked up to come on when the key is in the secondary position. Not like it normally comes on when cranking.

No codes.

mike0000

Haha that would definitely be a problem with fuel dumping into the intake

scope103

How can it be "running rich" without Code 26? That's the whole point of EFI.

What does "All vacuum hoses deleted" mean?

mike0000

Only vaccum hose on the engine is for the fuel pressure regulator.

I have a wide ban air fuel gauge. None the less it smokes black

osv

maybe post up a pic of the engine.

does that gauge have it's own wide band sensor? because the primitive efi system will only support narrow band sensors.

some of the wide band gauges will emulate a narrow band sensor, and that narrow band signal is used by the computer in the car... is that how it's hooked up here?

mike0000

Yes it is an aem wide ban that has its own sensor

mike0000

osv

fwiw, it looks like the idle-up for the power steering is hooked up wrong, there is supposed to be an adjustable valve in the vacuum flow: https://www.yotatech.com/forums/f116...p-idle-148626/

i can't see how that would cause a running rich problem, unless it's somehow robbing metered air and screwing up the a/f ratio, but you could try plugging off both of the intake connections and see what happens.

i still think that it's fuel pressure related, or those injectors.

mike0000

Alright so I installed a new air flow meter. Checked knock sensor circuit. Replaced knock sensor. Also I replaced the circuit opening relay with repaired the fuel pump so it is no longer hardwired on when u turn the key on. Reset computer. Drove truck around it was running good. I sat in line at a drive thru. Truck got up to 190 degrees. Truck was lean while idling. As soon as I took off. It was loaded up on fuel and running rich.

I don't have the screw piece for the power steering idle up. It was missing when I got the truck

mike0000

Still waiting for a used ecm and fuel injectors in the mail

osv

check to see if it's throwing any codes.

air flow meter replacement was a good call.

i would still try plugging off both ends of that idle-up pump circuit, because i can't see how it's going to give you variable idle control without that screw adjustment piece... worse than that, it looks like it's allowing air from both sides of the throttle plate to mix?? and as i understand it there can be quite a bit of difference in the amount of vacuum you get on each side of the throttle plate??

mike0000

There are no codes. Never has any codes. The power steering idle up was capped off until 6 months ago when I tried to hook it up to get more power steering assist. It still does not idle up any. Truck ran like crap long before that.

osv

code #5: "Open or shorted Oxygen Sensor (O2) circuit
- Lean or rich indication (with injectors full rich or full lean)"
http://www.4crawler.com/4x4/CheapTri...des/#Early22RE

"loaded up on gas" would probably be putting out black smoke, so i can't understand why it's not throwing an overly rich failure code.

since the idle-up doesn't work because it's missing that piece, there isn't any point in leaving it connected, all that it's doing is creating another variable in the troubleshooting process.

mike0000

Alright so I replaced the ecu, installed a set of stock injectors and removed the idle up for the power steering pump. Truck still runs like crap. Also it has a slight missfire at idle when its warm

osv

dang, what else is left?? you've hit a lot of the major problem areas.

it still has black smoke, but no code #5 for a rich condition? i don't see how the fuel pressure could be too high, with a stock pump and fuel regulator setup.

fwiw, here is more info on that idle-up piece, if you get one to hook up in the future: http://www.22reperformance.com/faqs/dianostic-info.html