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I had posted a couple of weeks back regarding a continuing problem that I am having with my 1994...
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I had posted a couple of weeks back regarding a continuing problem that I am having with my 1994 Toyota SR5 XCab 4x4 V6 engine, 5 speed. Not to far back, I got both a Code 14 and a Code 25. I fixed the former. However, this Code 25 (per the Toyota factory manual) is driving me to drink! I take care of the truck religiously and it has 216k miles on it. I took it to the local Toyota dealership with a Code 25 (lean air/fuel). I was first told that I had a cracked throttle body tube which was causing air to bypass the MAF sensor. Sure enough, it was cracked (vacuum leak) due to age. I fixed that after I got the replacement part from Toyota. The check engine light (Code 25) came back on. Back to Toyota. According to the Service Manager, I now need to remove the Bosch Platinum Plugs I put in during Summer 2008 and install Denso or NGKs. I did not believe him so I did not perform the switch. However, I posted my problem on Fixya.com and I was consulted to make the switch to the factory-specified plugs. In the interim (i.e., before I had a chance to change out the plugs), once again the check engine light appeared (Code 25) and I was told by the Toyota Service Manager that I my fuel injectors were "bad" and replacement would be $1050 + labor. When I challenged the Service Manager, he changed his tune and said they were "clogged." Here is an up-to-date cronology of what I have done since: 1) new ignitor (AutoZone) per Code 14 2) new Denso Plugs 3) new factory wires 4) lots of fuel injection cleaner (2 cans of Gumout Cleaner in the throttle body, 2 cans of Sea Foam in the tank, 4 cans of Berryman in the tank) 4) cleaned the Mass Air Fuel sensor and aluminum unit with a product from AutoZone specifically designed to do so. 6) replaced cracked air tube at the throttle body 7) new air cleaner element I am at my whits end with this thing as I have obviously not corrected the problem. My last solution via Fixya.com was to change the plugs and the Code 25 would go away. NOT! Here is some additional information for diagnostic purposes: 1) the truck is harder to start than usual, 2) it has a side-to-side "shakiness" (at idle) which is more pronounced than before the code 25 emerged. 3) feels like it has less power when I start it up but seems to slightly improve once warmed up. and 4) it feels like there is a miss during excelleration. Are there any sensors which I should check and/or replace? I am requesting advise at to what I should check at this point? I just lost my job recently so I cannot really afford to take it to Toyota. I am mechanically inclined enough to do it myself and in this case I'm going to have to take that route due to economic conditions at the moment. Please help! Bob
