blazer s10 high idle ...have codes

[chriskrebs]

I listened and looked and disconnected and reconnected the vac lines I could ID:
T behind distributer cap, one is capped, one goes to round cannister, one terminates to the back of the throttle body
brake booster
pcv
thats all I saw
I'm missing some, right?
If you could help me ID the rest, could I spray carb cleaner at the connections, to see if it sucks it up?
Thanks again for your help

[BlazerLT]

You should have vac line going to:

-Brake booster
-Vacuum ball in the engine compartment for the heater controls.
-4x4 transfer case vacuum actuator.
- PCV valve
- EVAC purge system.

Carb cleaner would be an excellent way to find out if you got a leak.

Spray the ends and along the hoses and if your engine rpms pick up, you have found the possible leak.

[chriskrebs]

Results of the vacuum leak check:

Brake booster: none at the booster, slight rise in rpm going into motor
Vacuum ball: None at the ball, none at the "T".
4x4 transfer case vacuum actuator: have 2x
PCV valve: slight rise at valve, none going into the TB
EVAC purge system: None at the cannister, none were line goesin under the butterfly
Sprayed near EGR, slight rise, but verified its mounted tightly
Sprayed near IAC, slight rise, removed, cleaned again and re-installed

Still getting codes 23 and 35

On test ride, she'll idle 7mph consistantly til I give her gas, then she acellerates slowly up til 13-15 mph

Another thing I noticed is, it isnt as bad when cold, when at operating temperature, she'll really take off.

Any more thoughts?

I feel I'm beating the crap out of the motor and brakes.
Thanks
Chris

[BlazerLT]

Might be a dumb question, but have you reset the computer yet?

[chriskrebs]

I disconnected the negative terminal for 5 minutes after I put the old TPS back in, is this sufficient?

[BlazerLT]

Should be, but I would do it again and remove the two ECM fuses from the fuse panel as well just to make sure.

I would wait maybe 15 minutes.

[chriskrebs]

I removed fuse marked ecm 1, waited 15 minutes.
Ran it for 5 minutes in drive with brake on and shut down.
Read codes again still got 23 and 35
?????????????

[chriskrebs]

oops missed one will try again
sorry

[BlazerLT]

Turn the key to the on position, remove the two fuses for ten minutes.

Turn key off after 10 minutes and reinsert fuses.

[chriskrebs]

done.
it cleared all codes, drove around the block but it still accelerates when in gear.
Did not get ses light (yet)

[BlazerLT]

You must have a vacuum leak somewhere or your throttle butter fly is stuck partially open.

[blazee]

Originally Posted by BlazerLT

Turn the key to the on position, remove the two fuses for ten minutes.

Turn key off after 10 minutes and reinsert fuses.

My haynes manual says diconnecting or reconnecting power with the key on can damage the ECM.

[chriskrebs]

I checked for leaks (see previous post), would this slight rpm rise account for the self-acceleration? All hoses seem to still be pliant and seated.
I have cleaned the butterfly and throttle opening with carb cleaner and a shop rag.
When I open and close it, it appears to seat properly.
What if i had someone press the gas, while I watch the butterfly, would I see anything even with it in park?
Could it be something with the cable?
The idle (tho a little high) maintains until I give it gas, then it gradually accelerates. Sometimes it maintains at 35 mph, after rising from a standstill.
I'm trying to give as much information as I can.
Thanks for hanging in there with me.

[BlazerLT]

I did it to mine and I didn't get any damage.

You can damage removing the fuses, but you can damage it inserting the fuses.

That is why I said to turn the key off and reinsert them after 10 minutes.

[BlazerLT]

Originally Posted by chriskrebs

I checked for leaks (see previous post), would this slight rpm rise account for the self-acceleration? All hoses seem to still be pliant and seated.
I have cleaned the butterfly and throttle opening with carb cleaner and a shop rag.
When I open and close it, it appears to seat properly.
What if i had someone press the gas, while I watch the butterfly, would I see anything even with it in park?
Could it be something with the cable?
The idle (tho a little high) maintains until I give it gas, then it gradually accelerates. Sometimes it maintains at 35 mph, after rising from a standstill.
I'm trying to give as much information as I can.
Thanks for hanging in there with me.

This still sounds like a vacuum leak.