Christi@n

Re check now you was right.. Right couple blu/grey either blu/black,
Blu always need to be is signal to computer

Well test result is from 2.68 k ohm to 7.61 k ohm

Could works properly? Or its a bad TPS sympthom

http://www.ehow.com/how_5832553_chec...on-sensor.html

Some instructions here
They say any sudden drops or increase in the reading indicates a bad tps

Its hard to say

aDigitalPhantom

The one I have ranges from 2.8k-7kohms the throttle body is not on anything.

PS
Have you checked the IAC?

Christi@n

IAC is new, just Replaced, possible to do a multimeter test on IAC wiring?

aDigitalPhantom

Yes you can ohm test the IAC, but I don't have any links for it.

Christi@n

i've re-tested TPS with omh scale, slowly rotating the shaft, and i've got a good response in omh scale, the slowest movement the slowest increase in reading, no sudden drop or rise, so TPS shuold properly works,

Also Tested the IAC wiring is very simply, 4 connectors two external 0.35V two internal 11.55V, So think IAC is working properly too

probabily the issue is about IAC count, how said from Bjankusky, but i've no scanner and no tuning program

DAMN IT

Christi@n

Last contact between screw and TB shaft occur at 0,61 v at TPS, unscrew again and TB shaft doesn't follow screw. It stay there.

Supposed to be ok?? Seems not be stucked

I have not datamaster or any other scantool unfortunately yet

aklim

That simply means that the butterflies in the opening of the TB have closed completely and you cannot go back from there. It also means that any air going to the motor comes from one of two places. The "metered air leak" aka IAC or an unmetered air leak which is the leak from a broken hose, leaking gasket, etc.

Without a scantool, there is no way to see what is going on. So if you have a high idle, it could be that there is a leaking gasket or hose which allows unmetered air into the engine. For instance, if the TB is in the position you mentioned and the IAC counts are 0, it means the engine is getting too much air. Usually that signifies a leak from a hose or gasket.

On my L98, I get everything hot and running and the temps stabilized. Shut everything but the motor off and see what the IAC counts are. If it is more than 20, it means the engine is not having enough air and the IAC is being commanded to open up more. In which case, you have to turn the screw in to get the throttle plates or butterfly to open up more. Rev it and recheck. If it is less than 20 and the TB is in the current state you mentioned, it means too much air is coming in and the IAC is unable to shut down the air leak enough. At which point, you go hunting for the leak.

PS. I forget which year is the bastard year where it is between OBD1 and OBD2 and some have had difficulties reading the ECM except with a Tech 1 or a Snap On scanner. Someone else will chime in. Regardless, you need a scanner to do anything. This is not the carb style where you can simply throw parts and get it working. You need to understand more about the car and have a scanner.

Christi@n

that bastard year is my year (1995) i have OBD 2 plug coupled with OBD 1 software,
So i would assume taht the only thing i can get is tuner cat datamaster


My idle is not so high, but it won't go under 900 rpm, in place of 750 rpm.

aklim

That or Tech 1? I would think that a Snap On scanner might work. Ask around. I have an older "The Brick" that I bought off ebay. I have a 91 so IDK.

Without data, we can guess all day long but I don't know how you know you have 900 RPM. I really don't trust the tach you have in the car. I prefer to see what the ECM says because my tach was over 300 RPM faster than it should be. On my F-body the tach was spot on but on the Vettes, I haven't read much that says they are accurate. Mine is reasonably accurate now that I have sent it in for calibration. I verify RPM with my timing light that has a tach and the scanner readout. I only use the stock tach for when I am driving.

Christi@n

Yes... I had to take something has soon as possible or dataster or scanner

Christi@n

Yes from tach

aklim

I wouldn't trust it until I get a scanner of some sort. Can you check whether the scanner at Autozone can help?

Christi@n

I've already seen a lot of scanner around, and I've definetly decided for tunercar data master, that is a more complete platform.

Just I had to wait a little, due I havent't 200$ to spent at the moment

aklim

If the Autozone one will work, check out IAC counts when you are there with ONLY engine running. Also check out the Ambient air temp and the engine temp so you can see if the values are plausible. So if it says your ambient air temp is 20 degrees and it is 75, you have a problem. If it says your IAC count is 0, you also might have an air leak since you backed it all the way close.

Not sure how to do this with MAF but with SD I take off the hose going to the TB if the counts are 0 and plug off the IAC physically and see if it changes. If the engine still runs, there is definitely an air leak.

aklim

I bought the cord and downloaded the free system since I am not going to tune my own car ever.

pcolt94

Get the screw back to where it was.

Have you ever considered the IAC being defective. Although not for sure but this is one of a common symptom of a defective IAC motor. You might be trying to adjust or compensate for something without finding the root cause.

I would first clean the throttle body real well before I replace the IAC. As well as the IAC passages. You could try the clean the IAC for test purposes and if there is a marked difference I would then replace it.

** Just saw the IAC is replaced, missed it sorry, whatever.

aklim

I agree on the TB. I think he can remove the TB, remove the IAC and remove the IAC housing and clean everything and should be done every few years. That mandates new gaskets.

Christi@n

:d:d

Christi@n

Well, all considered from your experiences

At this point this trouble can be three thing:

1.Unmetered air from a broken hose or gasket

2.Iac count

3.defective tach

Christi@n

Recently made. New gaskets. New Iac and Blu loctite on all screws to avoid any unmetered air from there.