lightemup

im getting code 25 on my 88 toyota pickup and cant get rid of it ive replaced the o2 sensor. and my truck is bogging really bad in 2nd and 3rd. is there any way to adjust the afm to make it run richer.

abecedarian

fix the exhaust leak?

thook

Hehehe.....

Or, test the AFM. Fixed is not a bad meter by mere adjustment.

abecedarian

air doth not enter exhaust perchance
breech en requiem for it not be fallacy

thook

Ah, but should thine meter be faulty of nature, then thouest may have oxygen in excessivethetheth amount'sth.

abecedarian

perchance thou mayest be vindicated

but exhaust leaks, or even more likely vacuum leaks, are more likely culprits than a mal-adjusted afm.

thook

Mal-adjusted doth not a bad meter equal.....

And, possibly it could be a leak. But, I've two meteres go bad on two different vehicles at right around 200k. Both lean conditions. S'why I merely suggest the investigation.

/me pinches abe....XXXXXXX

abecedarian

verity well be things, lest I have 240k on mine without nary a problem.

thook

Fortunate thou art, for thine vehicle doth runneth of proper and reliable manners. Salute!

And, $340 later.........so do mine....haha.

lightemup

no exhaust leak or vaccume leak. how do i test afm

toyota4x4907

http://www.4crawler.com/4x4/CheapTricks/AFM/index.shtml

edit: Huh. I cant seem to get on 4crawlers website. I dont know if its my computer or what.
Go to 4crawler.com and search around for the AFM testing, if you can get on his site.

abecedarian

hmmm... '88-code 25: air/fuel ratio LEAN malfunction. - feedback value continues at upper limit, or oxygen sensor signal continues at the lower limit.

gonna add the PAIR system may be malfunctioning...

toyota4x4907

Damn the PAIR system

abecedarian

thought you might get a kick out of that hypothesis.

toyota4x4907

Naw I dont really hate it. In fact, I think its a good thing.

lightemup

k im new this efi stuff so what is the PAIR system how do i test it and hows the weather in freezebanks haha

toyota4x4907

Oh right on! You're in Palmer I almost moved there last December. Freezebanks is just as the name implies...freezing ha

PAIR= Pulse Air Injection (Reaction ?). Basically it uses vacuum created by the pulsing affect of the exhaust to draw fresh air in to the exhaust to aid the catalytic converter in its processes.
Testing:http://personal.utulsa.edu/~nathan-b...20pulsedse.pdf
Its a 22r/22re, right?
Also, is your air filter really dirty?

lightemup

ive never been in fairbanks in the winter only in the summer to race quads. and its 22re, and air filter is brand new out of box. so does PAIR work off egr if doess could you block off the egr and problem sovled or is it a seprate deal

toyota4x4907

I just moved up here in August. I have been up here in the winter and summer before because my sisters have lived up here (one still does)..but besides the point...

No. it doesn't work off the EGR. I don't think the PAIR will directly affect a code being thrown. Dont take my word for it, but im pretty sure. Like ABE said, its a possible culprit for the lean mixture. How? (what I think) The PAIR valve may be malfunctioning and not allowing air to pass through it, so the O2 sensor is reading extra fuel, therefore causing the ECU to trim the fuel resulting in your lean mixture.

lightemup

well it was working fine on the other motor so how much does one cost and do you really need it. well i guess my next truck will be the 22r ive heard they dont have as many problems