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You should do a BFG KO2 (not running a spool) review.
Before long Gnarls gonna be a master at the 22RE.
Blabbity blabbity blah! Yurhg! Sheesh. . Taweeekur.
I think the pressure regulator is on the end of the fuel rail so it works like a pop off letting fuel out through the return, not like a restrictor on the way in.
H8PVMNT .... I think the pressure regulator is on the end of the fuel rail so it works like a pop off letting fuel out through the return, not like a restrictor on the way in.
... I have heard the 261C tends to make a lot of racket, compounded with the later aluminum rockers, which I hate by the way, but I'm weird... Seriously though aside from snugging up valve lash if you get a set of early steel rockers and polish them on a wet stone for break in they will quiet down the valve train. Probably not worth the trouble unless it really drives you nuts.You pretty much need to replace all that stuff and see what happens. You know what? I have an '85 22re sitting in the back of my kids pickup. We are going to use carb on it, cough, carb, cough. Do you want me to send you some bits from it to help with diagnosis?
I wouldn't run your idle below 1k with the 261. It cause the engine to just not seem right.
hhhmmmmmm... from my research you are both wrong. You may be thinking of the pulse damper... at the other end of the fuel rail. The pressure regular DOES regulate the pressure to the injectors and can be become faulty and will restrict the correct fuel pressure to the injectors. It will "return" fuel to the tank as it functions to regulate.Gnarls.
As a test comparison, I am tempted to replace this camshaft with the stock one that is sitting in my old head.
It regulates by acting like a popoff valve, there is no restriction to incoming fuel. Any restriction would tend to raise fuel pressure.The popped off fuel returns to the fuel tank.
If you are running lean, you can richen the the A/F ratio by adjusting the AFM.
If you're careful, you should be able to swap the cam and rocker arm assembly (so the rockers are matched to the cam) without replacing the headgasket.....
As I stated before, it took me 10 days before I had enough and pulled mine.Sounds like you will be close to the same result, Rofl
Yes, I thought the same thing and did not immediately consider that part as causing a possible lean mixture condition. After doing more research, I read the attached page from the Toyota EFI and Engine Controls Systems book that I bought on :)bestgen4runner's suggestion.Since the gas sat for almost 4 years, and did have some crusty looking stuff on the fuel pump I replaced, so is it possible that a 31 year old fuel pressure regulator could be restricting the fuel flow?I'm trying to look at every possible cause or effect, known or unknown, and it seems the more I look for answers the more questions I get.There is, no doubt, an incredible amount of experience and knowledge here, so would you go with the anecdotal and possibly correct experiences of us DIYers, or would you consider the training manual for Toyota mechanics?I always do my best to keep an open mind, especially about things I'm on that are a continuing learning curve.Gnarls.
It's easy to get to. Try it.
Hey Gnarly, can we get some more info on this book, where did you buy it? I might be interested in getting a copy if it goes into more detail than the FSM.
I bought the last one here:https://www.amazon.com/Toyota-Control-Systems-Technicians-Handbook/dp/B000M5BQEC/ref=sr_1_1?ie=UTF8&qid=1492880656&sr=8-1&keywords=Toyota+EFI+and+Engine+Controls+SystemsBut you might do some research and find a source.Gnarls.
Hey Snowtoy,Yes, I considered that, and have not yet tested the AFM. However, before I toasted the engine, the AFM was performing fine. Nothing should have changed with it, although anything is possible. Unfortunately, I did not keep the old spark plugs... dumb move... I could have had them to compare with... now I will take photos and document in my library of Tweaker-Tuner data!Gnarls.
The adjustment isn't due to an issue with the AFM, it is to allow more fuel to be added to the baseline mixture. The stock programming is from "X" intake volume at idle through wide-open throttle, if the 261 cam allows "X+" air volume at idle, causing a lean condition as the one mechanic you spoke with theorized and you think you are seeing, it would mean that the ecm's stock programming parameters cannot compensate for the additional air volume the 261cam is allowing in. By manually adjusting the AFM baseline for the additional volume of air, the ecm stock programming should be able to accurately monitor the A/F mixture from there.
How to link from another Toyota site.http://www.4x4wire.com/toyota/minutemods/afm/BigMike also has quite a bit of input/info here, http://board.marlincrawler.com/index.php?topic=5446.0
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