this morning i drove my wifes town and country to work, because she has my truck for a few weeks, and i dont drive her van very often, so im not sure how long this has been going on....this morning was around 56 degrees outside. i started it, let it idle for about 10 seconds or so, then pulled out of my subdivision. when i got to the end of the street, it almost died on me when i came to a stop, but then it seemed to catch itself right before it died, and then idled normally. this happened again and again on the way to work, but it never did quite comepletely die on me. i was wondering if anyone had a clue what i might look at first? i am pretty mechanically inclined, as i am an aircraft electrician in the air national guard as a full time technician, so i can pretty much do it all, but without any diagnostics to help me out, im starting from scratch. based on the codes i have from the odometer, its an issue with the o2 system. is there a way to test these o2 sensors without a bench test set up? the codes i have are: P1193, P0135, P0134. thanks for any advice you may have!

 

A spark chaser eh. Test them? Yes but it's a real PIA to get to the upstream sensor harness. It's on the back side of the engine on the exhaust manifold. If you can get at it connect a multimeter between the signal wire (back probe) and ground. With the engine warmed into closed loop mode you should see the meter very between 0 and 1 volt. A scope is the ideal way to test it but a meter will give you some idea if it is working. You can check resistance through the sensor heater and reference voltage from the PCM. Give me a model year and I can get you a pinout.

BTW - 26 years in the AF on F-111s and F-117s as an avionics tech.

http://www.obd-codes.com/p0134
http://www.obd-codes.com/p0135
P1193 Inlet Air Temp. Circuit High

 

ahhh....a pointy-head, eh?? lol....22yrs and going strong!Crew Chief on F-15's, and a Sparky on F-16's. its a 2003 3.3L. it shouldnt be too bad to get to, since the insulation blanket has been removed from the exhaust manifold from the time i had to basically tear the engine down in the driveway and replace the piston, valve spring, etc....i should just need to take the resonator off and i think i will be able to get to it relatively painlessly. thanks for your time!!

 

Sounds like you have a handle on it. Pointy head, cone head, yup one of those. Worked flight line avionics not back shop in a cushy lab. Plattsburgh, Pease, RAF Lakenheath and finally Plant 42, Palmdale, Ca. Great fun trying to manipulate tools at -30 temps or sweating yur nads off at 100+. Ah those were the days. Not news to you.

Upstream sensor pinout:

pin #1 - brwn/lt grn - heater ground at PCM
pin #2 - brwn/wht - heater power from ASD relay
pin #3 - brwn/dk grn - sensor ground at PCM
pin #4 - dk blu/lt blu - sensor signal to PCM

 

thanks for the info! i do appreciate it....
Langley AFB F-15 CC
Springfield, Oh. F-16 CC
Wright Patt- F-16 E&E
Springfield, Oh. F-16 E&E
Seymour Johnson AFB-F-15 CC and E&E
Andrews AFB-F-16 E&E
Retirement???....