Symptom was that the truck started and ran fine, except occasionally on a cool day it would start fine, run a few seconds, and die. I've replaced the fuel pump a couple of times over the years (owing to ethanol in the gas - deterioration) but am pretty sure the pump, fuel pressure regulator, and so forth are all fine.
This went on for a while; over the Summer the truck did not do it, it ran fine and I thought of all sorts of possible temperature-related things, even checked the cold start injector per the manual, it is fine. Now it is cooler and I cannot get past the starting/dying.
The CEL code is 24, which says that the intake air temp sensor is the problem.
The intake air temp sensor is built in to the Air Flow Meter. Manual says to check ohms between various pins, all of which are good per the manual - except the two pins for the air temp reads 'open circuit' instead of the ohms the manual prescribes at various temperatures.
Manual says to replace the AFM if anything does not check right. Fine, it is only money and the truck has been really good to us since 1992 so I do not begrudge it any parts it needs - but can't find an AFM anywhere. Couple sketchy-seeming places on the Internet claim to have rebuilt ones, Toyota says "Discontinued" - so here I am.
The part number is Denso 197100-2920 and Toyota number is 22250-65010.
Questions:
1) Anyone know where to get a suitable AFM, new or rebuilt?
2) Anyone have an idea who might rebuild this AFM - install a new temp sensor?
3) any way to pinch hit for the temp sensor with an add-on resistor of some kind?
4) since the truck is old enough to be emissions test exempt, is is possible to delete some or all of the electronic controls and just make it run 'mechanically'?
Thank you if you've read this far.
And thank you very, very much if you have any suggestions or guidance.
I cannot let one miserable electric piece kill this truck.
This went on for a while; over the Summer the truck did not do it, it ran fine and I thought of all sorts of possible temperature-related things, even checked the cold start injector per the manual, it is fine. Now it is cooler and I cannot get past the starting/dying.
The CEL code is 24, which says that the intake air temp sensor is the problem.
The intake air temp sensor is built in to the Air Flow Meter. Manual says to check ohms between various pins, all of which are good per the manual - except the two pins for the air temp reads 'open circuit' instead of the ohms the manual prescribes at various temperatures.
Manual says to replace the AFM if anything does not check right. Fine, it is only money and the truck has been really good to us since 1992 so I do not begrudge it any parts it needs - but can't find an AFM anywhere. Couple sketchy-seeming places on the Internet claim to have rebuilt ones, Toyota says "Discontinued" - so here I am.
The part number is Denso 197100-2920 and Toyota number is 22250-65010.
Questions:
1) Anyone know where to get a suitable AFM, new or rebuilt?
2) Anyone have an idea who might rebuild this AFM - install a new temp sensor?
3) any way to pinch hit for the temp sensor with an add-on resistor of some kind?
4) since the truck is old enough to be emissions test exempt, is is possible to delete some or all of the electronic controls and just make it run 'mechanically'?
Thank you if you've read this far.
And thank you very, very much if you have any suggestions or guidance.
I cannot let one miserable electric piece kill this truck.
