intake pop and p085 code

For the longest time (over 2 yrs) the car sometimes pops out the intake during starting and blows off the Northstar cover.  It's been passing smog with flying colors, so I left it alone.  Finally a P085 code came on.  I found a leaking fuel pressure regulator, and replaced it.  Starts and runs great now too.  Only thing is the code keeps coming back.  I've taken off the filter and cleaned the throttle body and ID, cleaned the air filter (K&N), checked the voltage on the TPS from idle to WOT, it was perfect.  Watched as the IAC do it's thing.  Yesterday I tried something different.  I was safely driving in a rural area about 45, and I cleared the PMC codes, at 45, not letting it idle.  The check engine soon light went out, then came back on.  It had the same code.  How can I get a throttle blade angle high at idle, when I don't even let it idle.  I'm thinking about taking back off the beauty cover on the intake manifold and resealing it.  Is there a seal kit for this, or is it use your own RTV?
 
Within a week both back windows and the driver's front windows quit working.  I pulled the switch out and used peices of wires to operate the windows.  The only one that worked with the hotwiring was the front passenger.  All the rest sparked like they needed juice but nothing moved.  All 3 motors bad in a week.  I have no kids rolling them up and down playing with them.  This doesn't make since for wearing out.  I'm wondering if there's weak electrical connections in the doors?  I've found I've spent a lot of time with poor electircal connections (Rear turn signals, rear brake lights, third eye brake light, blower motor wires melting...) on this car.  Any advice?
 
Any help would be greatly appreciated.
 
 

Year and Model?

1994 Seville SLS with almost 177,000 miles.

Do you have FSM? You stated you checked tps at idle what was reading and how did you do it? Are you cycling key when pop occurrs? Have you checked min.air rate/ idle speed?

Wow, just about everything you asked I don't know.  I don't know what FSM is, or how to check min. air rate/idle speed.  The popping does not occur anymore, the fuel pressure regulator fixed it.  I checked the TPS with the car off for resistance, and from idle to WOT there was no jumps and it was nice and smooth.  I also checked the TPS voltage while the car was running.  At idle the Chiltons manual, I think said it should be around .5 and it was .8.  Also it went to 4.5 instead of 5.0 volts.  Last night I went to PCM monitor, 001 (TPS), and noticed that at idle the degrees went to -2.8 everytime.  I think the lowest it should've gone is 0.0, is this right?  Thanks a lot for your interest in helping me, I really appreciate it!
 
Rick

TPS reading is too low, you are correct it should read 0 or close to it. OEM sensor is not adjustable. How fast does engine idle? Check for vacuum leak(s) including vacuum harness plug at top of throttle body. Has the base idle screw or isc been adjusted? Any repairs prior to this concern occurring?

Engine idle seems normal, I'd guess 600-700.  I hadn't done any maintenance prior to the light, but I believe it may be related to the intake popping.  I found the gasket on the beauty cover I took off to check and replace the FPR was blown.  I cleaned off the old gasket and applied a thin amount of RTV to top of the intake manifold and another thin layer to the top of the fuel rail brackets.  I don't  know if it sealed, or not.  Can I check the idle vacuum somewhere, if so, what's normal?  I'm also wondering if it blew the throttle body seal too...  But something I don't get, why is it negative, if I had a vacuum leak it seems like it would be positive as it's compensating for the leakage...
 
Rick

quote:

ORIGINAL: leitthouse

Wow, just about everything you asked I don't know.  I don't know what FSM is, or how to check min. air rate/idle speed.  The popping does not occur anymore, the fuel pressure regulator fixed it.  I checked the TPS with the car off for resistance, and from idle to WOT there was no jumps and it was nice and smooth.  I also checked the TPS voltage while the car was running.  At idle the Chiltons manual, I think said it should be around .5 and it was .8.  Also it went to 4.5 instead of 5.0 volts.  Last night I went to PCM monitor, 001 (TPS), and noticed that at idle the degrees went to -2.8 everytime.  I think the lowest it should've gone is 0.0, is this right?  Thanks a lot for your interest in helping me, I really appreciate it!

Rick

I hope this helps a little ...

quote:



Factory Service Manual


General Motors 3-volume service manual set for the 199X Cadillac Seville STS and SLS.  More than 3000 pages of repair instructions written by General Motors. It contains Diagnostic Information and Procedures, Schematics and Routing Diagrams, Component Locator, Repair Instructions, Description and Operation, Specifications, and Special Tools and equipment. Service information on HVAC, Body & Accessories, Restraints, Steering, Suspension, Driveline/Axle, Brakes, Engine and Transmission/Transaxle.

PD1 shows throttle angle not volts. With isc retracted - not contacting throttle lever what is idle speed in PD11 should be around 500+/- 50 rpm. If it wont idle or idle is too fast. You need to find out why. If min air rate is ok try re-learning tps and idle

Things are getting confusing now.  PCM data 001 I refered to as degrees a few messages ago...  Anyway, since it goes negative even without the ISC retracted, does this mean that the TPS is bad?  Idle relearn will have no bearing on the TPS degrees, will it?  If relearn doesn't reset TPS angle, then I'd think one of my problems is sticking out like a sore thumb as the thing goes negative when I idle the engine.
 
Rick

Minimum Air Rate or base idle is where you have to start. Once that is correct or verified to be correct, then TPS can be learned. Which should zero reading in PD01, then Idle relearned. If all goes well your E85 goes away.

I over-rode the PS03 ISC Actuator.  Next engine speed was flashing between 475 and 500, and PD01 was at -4.3 degrees.  So the speed is good, and TPS degree is bad.  I was told that if I disconnected the battery for 5 minutes, it will re-learn idle.  I disconnected the negative cable, 10 minutes later reconnected, no change in nothing. 
 
Somewhere else I saw an idle relearn like, start engine and leave AC on high for 10 minutes, turn AC off, stop enigne, start engine and leave run for 20 minutes...  I didn't do this because it looks like 30 minutes of wasted gasoline.

I just saw on another post that you can get FSM's for around $20-$40?  What's the availability on one for my car?  If interested, how do I order and purchase it?
 
Thanks...

Go PS13 then press Cooler button to reset TPS, then turn key off wait atleast 30 sec. Perform TPS / idle learn procedure. 

Went PS13, pressed cooler button, nothing happened.  So, do you mean in overwrite PMC?  Tried it anyway, relearned idle.  Check engine line went out, then got a PS080 code.  Did it again, Check engine light went out, and cleared codes from history.  I did notice that at idle the PD01 is -2.3, but if the PMC doesn't care, neither do I.  Twice around the block, a couple of miles, no Check engine light.  I think it's temporary though as a negative throttle degree while the engine is running...who knows?  Will keep you posted either way.  Thanks for the many, many posts of help.  What about an FSM???
 
Me

Oh-yea.  I guessed at what re-learn idle was from other web-sights as it's not on this one and Chiltons says to do it, but doesn't say what it is. 
 
Warm engine up.  Stop engine
Turn key on/off three times (on and off counts as one)
Start engine, let run for 3 minutes.
Keep engine running, turn on A/C for next three minutes.
With both A/C and engine running, put into gear for five more minutes.
 
Does that look correct?  If not, it somehow worked.  The sevice engine light went out on last step and the LO for the miles to empty would show numbers and start working again a few seconds later.
 
Thanks again...

To relearn TPS after reset.

1) Turn key to run. Enter diagnostics.

2) Turn key off. Wait 30 sec.

3) repeat steps 1 & 2 three times

To relearn idle:

1) Start engine and let idle for atleast 10 min.

2) If on turn off A/C off. Shift into drive, wait 3 min.

3) With car still in drive. Set A/C set at 60, turn A/C on wait 3 min. (with A/C set at 60, compressor should stay engaged any not cycle, blower should be on high)

4) Shift in to park and turn off.

TPS and Idle should now be relearned

Gotta couple of questions...   Can you be more specific on resetting the TPS, PMC Monitor or Over-ride?  Will anything change when the cooler button is pushed that is obvious like "tps pintle reset to 0.0 degrees" would be cool.
Secondly, any word on what you can do for me in regards to an FSM, or if you don't want to, that's cool too.
 
The good news, I got my 3rd eye brake light 100% operational, was at 33%.  I was thinking of posting the process I did, think that'd be ok?
 
The next thing I want to fix is the drivers and both back door windows do not work.  Everything quit working pretty close together, and this wasn't a family car with kids rolling them up and down.  I bypassed the switch, and only the front passenger window would work.  All the others looked like they were pulling some juice as the wired sparked, but no movement.  I thought I'd start with passenger rear one first.  Any thoughts??
 
Thanks again, thank-you for the help, very sincerely, this has been a fantastic adventure for me so far, I really do appreciate it!
 
 
Thanks again...

P080 TPS / IDLE LEARN not complete. Learning TPS will let ecm learn what TPS voltage is at closed throttle, should result in 0 degree reading after its learned. You  reset TPS in PS13 - cleared ecm's memory of tps base reading. You just did not follow it up correctly. Factory Service Manual there are 2 volumes for 1994 DeVille, Concours, Eldorado, & Seville. Volume 1 - Powertrain Volume 2 - Chasis & Body It will contain 90% of what you need to know to repair you car. Used ones are availible on ebay and through used manual venders on net. Prices vary, information can be priceless if you stuck. Unfortunately I cant hook you up with them, I have no spares.