dvdswanson

TPS should have voltage of .6 - .8 vdc if I remember right. check your PMs

__________________
Dave
96 4WD XE Reg. Cab ka24e
Calmini 3" SL, Steering, Lock-rite rear, LSD front

 

NelsonCnty

will I need to callibrate a new TPS that I buy from an auto parts store?

cjserio

There are no calibrations on the sensor...There is an adjustment in how you mount it. There are mounting grooves not holes so that you can twist the sensor slightly. When you mount it, you mount it such that you get 500 ohms with the throttle at Idle and 4k ohms with the throttle fully open. If you're not getting that range you can loosen the screws and rotate the sensor a bit until you do get it right.

cjserio

Actually my numbers are valid for a KA24E engine only. I didn't notice which one you have.

NelsonCnty

okay, new developments:

last night I measured 500 ohms with the TPS at rest and 4500 ohms with the pedal to the floor (ignition and engine off of course). I know this is a test of how well it is adjusted, but does this also mean that my TPS is still good? or, can a faulty TPS still respond correctly, in terms of resistance?

also, I cleaned my mass airflow sensor. not sure if it needed it or not, but I also do not know for sure if it had ever been cleaned.

a second problem too: recently, the engine has been sounding loud...like air. as if the truck had a really big fan on it that went faster as you accelerate. a wooshing as you take off. know what I mean? any ideas?

I read codes 32 "EGR control valve does not operate" and 43 "throttle sensor circuit is opened or shorted," though I hadn't reset the code in a month or two.

thanks for all your help so far!

zanegrey

well ,
the wooshing is the fan clutch ..

NelsonCnty

ah. how do you diagnose that (other than the wooshing over the internet )? is it a tough job and is it something that must be done before I take the truck out of town this weekend?

zanegrey

do not attempt to look behind the curtain...

just repalce it...

you can drive it like that ..it will affect your gas mileage and cool the engine too much..

it also could be the problem you have been having to whole time..

NelsonCnty

good to know - thank you!

so I guess what I still need to figure out is this:

zanegrey

i think that you have your meter on the wrong setting..

how ever if it has an ohm range it is working..

replace the fan clutch and then warm engine up and re read codes

rogoman

When cleaning the MAF, use only ELECTRICAL CONTACT CLEANER or a cleaner specifically made for MAF hot wire cleaning. This is the only thing you should use to clean your MAF. No windex, no carb cleaner, no brake cleaner, no rubbing alcohol, and no Q-Tips.

__________________
KA > SR anyday of the week.

NelsonCnty

hmm, well I used q-tips and rubbing alcohol, which is what I've seen recommended most if not all of the time 'round here and elsewhere.

here's hopin'.

NelsonCnty

well, a couple of weeks and abour 1400 miles later, all is well (with the TPS, at least). I have felt no kick-down at cruising speeds, and that particular error code has not returned.

I'm not sure it had to with unplugging/plugging in the wire to the TPS (because the sensor itself checked out okay) or if it had to do with cleaning the MAF, but so far so good!

Thanks, everyone, for your help.