Hey y'all,
im in san Bernardino, and i drove from Vegas.
i got half way after not running my car on the fwy for like a year, i ran it but not for over 15-20min.

im driving right, i get around 125miles or so, and i realize that my car seems faster, more responsive,
it seemed really weird, i didn't understand why it felt so powerful, i didn't have to touch the gas and im doing 80-90mph.


i pull over and i get to the off ramp, to get off the fwy, and i notice that the car dosn't want to slow down, i get off the fwy and im in the middle of nowhere and i start my car and its revving to 5000rpm.


im closer to my destination than my origin so i drive to my destination and im there now, but im not sure was to what could have happened....

im going to unplug the battery tomorrow to see if its a zzp ecu glitch mabey....

but could this be TPS?

or

the fast idle screw, its night time so i cant actually check till morning but any help could help... anything please


thanks alot...

Anthony

Sounds like a bad throttle position sensor or a stuck throttle cable.

Check to see if the throttle is stuck. Otherwise, huge vacuum leak!

i actually was thinking both, tps or some kind of leak.. ill see what i can come up with.


but if its a throttle cable, i was looking at that yesterday and i dont see how that could cause it since all snaps back... im betting money its the tps.

replaced the IAC and the TPS nothing as far as i can the cable is in proper condition, its not pulling the butterfly, i push the butterfly lever down and its as far as it can go.


im sooo stumped, mabey the fast ide or ilde adjustment is out of wack, looking in to that now.

i also cleaned the TB.. i was reading in another forum about the CAI
didnt know how this could affect this.

ok, i just adjusted the idle, with the idle screw under the throttle linkage, it went down to 1500rpm, i dont know if this is the absolute correct way to do it, and i cannot understand why it just all of a sudden just started doing this but its 1/2 fixed....

this is a wierd problem....

i checked for vac leaks again and i find nothing....

is there another way to properly adjust it.

the idle screw should never be adjusted... if it is too low it will cause binding.

if it isnt the tps... my money would be on maf... but there should be a SES light. either way i would scan it and check for codes

the maf just was replaced....

the idle screw is the only thing that lowered my idle...


im sooo stumped

It's a vacuum leak. I don't know how or where, but something is broken or cracked. No sensor that I am aware of will cause the extremely high rpms like you're experiencing.

ok i made it home and im not sure as to hw i got here wow that was an experience.

that drive was the wierdiest most bazare fearfull drive i have ever done..
took me 5hrs to get to a 3hr place..

i had to stop alot along the way trying to re adjust the idle screw, it would temp slow me down till from what i believe the ecu re-mapps te -0- throttle position or somthing.
then back to the 4500-5000 idle speed

my brakes SHOT
my trans ABOUT TO DIE
oil HAS TO BE SHOT
trans fluid TOTALLY SHOT TO HELL
this poor car...


going down hills with a car running like it was is NOT SAFE and i dont ever recomend it.

i would have to (when going down a hill) take it out of drive throw it in to netural and stomp the brakes. to just throw it back in drive, hoping ill slow down enough that i dont run out of control, while hoping my poor brakes dont give out...

and at the same time hoping i dont blow my motor from over rev and the normal wear on it...


man im glad thats over


but i believe it to be cpu related

im gonna scan it
and see what it says since im home now..

did you try and manually shift it? if you left it in third your rpms might not have been so high...

yeah i did switching to 3rd does nothing i even tried 2nd a few times nothing.
the shifting was wierd aswell too.

1st and 2nd would shit way way too high

You guys seemed to have missed that his idle when in neutral goes to 5000rpm ?MMMMwe have a built in govenor in the PCM that wo'nt allow revving past 4000 on neutral or park ,I suspect a vacuum leak but it's possible you got crap on the throttle plate when you tried cleaning.Chico(pops)

I've never seen a vacuum leak that would cause the car to run at 5k.

Only time I've seen it the problem was the throttle position sensor. Had a manual and try coming to a stop without stalling lol.

i blew a bunch of carb spray in the TB, while running cleaned ou the carbon build up.

i replaced the TPS, and the IAC i cleaned the inner port where of the IAC goes with carb spray, the only thing i can conjure up is the ECU. or the TB needs a rebuild or somthing, mabey somthing is blocking the butterfly from going down, but the butterfly is pretty well shut.


i tryed calling about a possible ECU issue but ZZP's phone was busy everytime i called.

There is now way the PCM can cause air to flow into the engine to the extent you're experiencing. Think about it, something has to physically be opening to allow a ton of air in. I don't think the IAC can even open up big enough to allow enough air to achieve 5k rpms.

You can verify the throttle body is closed when the linkage hits its stop.

as far as i can see and feel, is there a way to check other than that?

i was also told tro take off the map plug and see what happens.. im not near the car, need time to relax from allmost dying 8 times lastnight.

so ill check tomorow.. but i didnt think it would do anything except bog the car down.

Things I can think of off the top of my head to check for in no particular order...

Throttle cable
Throttle plate
Cruise Control cable
IAC
Vaccuum leaks(need to check gasket mating surfaces as well as hoses)
MAF
TPS Sensor (make sure it's not holding the throttle plate open)


Chico: yes there should be a limiter for park/neutral around 4k on a stock pcm, but I don't know if ZZP raises that in their aftermarket pcms.

To let that ammount of air into the engine, maybe something is messing with the Cruise Control? Is there a way to d/c it and see if the problems stop?

That reminds me. wayward CC could do it as well. Pull the CC fuse and see what happens.

The CC disconnects real easy from the throttle linkage. Just open the throttle for slack and push the end of it away from the cable, it just pops off.

Thats right I forgot about that, I was thinking to d/c the electrical, but hey, that works perfect!

Thats why i love mechanical stuff. You can SEE whats going on. And its so much easier

you are going to laugh....

i dont have cruse control, and if i do ive never seen it...

i chked my codes,

p0122 "bad tps or cpu" and since i replaced the tps i dont see how this could be the tps, i made a phone call to zzp, they are going to call me back..

now i did have somone tell me that it may be a crack in the intake manifold or i may have lifted it off the head, so its sucking in more air then the cpu compensates for the extra air comming in....

heres a question i have 2 cables going to the throttle linkage would that be an indication that i may have had CC at one point in time or somthing?

You have a GTP, you have cruise control. Do you mean yours doesn't work or what?

Yes, two cables going to the throttle body: one is throttle, the other is cc. The cc one has a plastic clip that attaches it. The throttle cable has a metal T that loops into the linkage.

ok wtf!

i just looked, i have cruze control!
but i dont anything in the inside of the car electronics and what not.

im disconecting it now!

The control for the cruise should be on your turn signal switch.

nope not there

I wonder if someone replaced it with a stalk out of another vehicle without CC? I wants pics of this as well.

I want pics also, this is odd


btw, you have to be in the pic with it. for proof purposes

any chance the removed TB mesh could be a source of this problem, my buddy removed his from his car and had a s***load of trouble until he put it back in per ZZP's instructions

http://dtxradio.com/anthonympulse/mail_attachments/CC.jpg

and

http://dtxradio.com/anthonympulse/mail_attachments/turnswitch.jpg


ok i disconnected the CC and it did nothing...
its not affecting this....


one thing i did try, i put my finger over the idle hole and it stopped running!
thats an indication that the intake isnt cracked or lifted....


anyone wanna buy a modded Wbody that wont slow down...lol

i saw that somone had that problem.
but ive ran my car for allmost a year w/o it
and never had any issues

i dont have the mesh anymore.

hahaha i cant fit behind the turn switch
hehe

Dont even offer your car jokingly around here! Be ready for some PM's asking prices!


Have you dont any work to the car recently? Anything at all? Maybe to the TB, or blower, fuel rail?

Which idle hole? If it's the one leading to the IAC then I'd have to say that there is either something up with the IAC or there's a setting in the PCM that is causing the IAC to open up too far.

haha at this point im about ready to let it go....
no joke..


i havent done any work to it asside from the stuff i did back like in sept of 07. nothing

back then i did:

TB spacer
ECU
ported blower
intercooler
headders
intake manifold
all from zzp

im still waiting for their call.

the one in the middle of the TB has a rail looking thing slightly slanted vertically with a hole on the top.. kills the car pretty quick.


yeah the iac is good
changed to another one did nothing same as tps.

I'm going to venture and say you need to take the tb off and see the gasket. Mine reved to like 2000 rpms because the IAC hole was leaking, because the seal between TB and supercharger wasn't tight.

I have a N* tb, but here are some pics for the leak to look for.
http://s106.photobucket.com/albums/m252/escapest01/Northstar%20setup/

I wonder if there is an issue with the tb spacer?

thats posible either one

is there instrustions to adjust idle?

but im still throwing code #p0122
bad tps or cpu.

Idle is only adjusted inside the pcm.

What happens if you unplug the TPS?

That code reads out for less than .1v reading from the TPS (in other words, it's like it's not plugged up).

You didn't try running the car with it unplugged did you? It might have caused that code.

To answer both questions,
The TPS yes when i was in san bernidino i pulled the plug on the tps thinking it was that initionally, figuring that if it didn't do anything, i would know that it was the problem, i took it off and it didnt do anything.

so i figured it was bad and bought a new one and put that on..

When i went to the parts store the guy said it could possibly be my idel control valve, and i figured might as well try it. so thats when i changed the IAC.

but the tps is plugged in now, and has been for like a dgood day and atleast 25 starts, why will it still throw that code then? bad tps wire mabey?

and i still wanna know why i dont have CC electronics....
that pissed me off when i found that today

Disconnect the battery for a while, or go to autozone and get the code cleared, see if it comes back.

Im really thinking that something isnt sealing right with the intercooler/blower/tb.

I was thinking sothing of the same, when a mechanic told me the the intake manifold could be cracked, or I may have lifted it off the head. however when I put my finger over the idle hole off the TB, the car dies, if it were a open seal (open to the outside) then it would suck air from elsewhere and wouldn't die when I put my finger over the hole.
if its an internal leak, meaning that the blower and intake isn't seating correctly or the tb may not be seating correctly, that's possible, except why or may I say how is it able to run soley off the idle hole its tiny like as small is my pinky...

I just don't get this, I guess I'm going to have to take the tb off ( that I can't do today due to work and lack of tools) but ill have to do tht tomorow.

Can you take a picture of the hole you're blocking off. I don't have a throttle body I can look at.

From his description before, I think he's blocking the maf.

That's what I'm thinking but I want to make sure.

Blocking the MAF will pretty much shut the car down as it doesn't think it's getting any air.

http://dtxradio.com/anthonympulse/mail_attachments/tb.jpg

That hole i think your talking about the same one.

sorry the pic is so small, its off my camera phone.

Yeah, I'm pretty sure that hole is soley for the MAF sensor. If you plug that you're gonna kill the car. Have you unplugged the MAF sensor yet? Don't drive it around with it like that but if it smooths things out it might be indicative of the issue.

The IAC comes in through the side of the Throttle body if I'm correct. I'm just not sure as that's the older style throttle body.

yup it kills the car. dead.....

i cant drive it its a danger to myself and others around me...

and it will completely blow my trans if i continue driving, the brakes are allmost toasted from the trying to slow down on the fwy and crazy grade downhills.

ohh and yes i did unplug it, it didn't do anything.

meaning noting as in the car wont start up.

Do you still have your stock pcm?

no i sent it back to zzp! for the core


and they still havent called me back
bad cust serv.

Actually, that's the newer style '99+ tb. But anyway, that hole is just for the maf.

If it looks like my '98 style behind there, there is a square cut right before the throttle plate that leads to the IAC and exits on the other side of the plate. The IAC controls the idle by constricting this passage.

You said you got the idle down lower right? Have you tried spraying brake or carb cleaner around the tb spacer, intercooler, or lower intake to search for a vacuum leak? If it finds one, RPMs will go up.

Question!

Why is it that every time I call ZZP their phone is busy! Or they just dont call me back.

in the words of Sagat Funk Dat!


jeeeezzzzz i just wanna fix my car....

email them

well i got the idle lower, however when i drive it (i haven't since Sunday) but id get it to like 1200-1800rpm then on the fwy it would slowly rise back up to 4500-5000 now for some strange reason its idling at 3200rpm, i sprayed carb cleaner over the whole engine at least the places where a leak or something could be... it didnt change the idle etc....


heres an idea, check this out...

back to one of my first ideas it could be...

somone said that the only way i could adjust idle is from the ecu, well successfully adjust idle, what if: the ecu is fry'd right it would change shift points and it could also mess up idle...

since the cpu controls all that stuff, i would believe that the computer is re mapping.


ie: i set the idle lower right i get it to 1800rpm, i drive it for a little while then the rpms want to rise, wouldnt that be the cpu re-mapping the -0- point of the throttle position????????????

at the same time the shifting was wierd too the car would wind up like a manual then finally shift....

thats why i want to get a hold of zzp, the lady who answered the phone on Monday was nice but would ask zoomer or somone whats up.. the trouble code i got is a bad tps and (or) bad ecu. since i replaced the tps i would believe that the ecu is bad, the lady told me to replace my tps since i did the tech lady said that shed have a tech guy call me... im still waiting....

ZZP GUYS HAVE A HEART CALL A BROTHA BACK!!!

Did you take the tb and spacer off yet?

i havent had a chance to i WILL do that tomorow...
i have to do it during work hrs and weve been busy the last few days here.

i parked my car at work sice i cant drive it and am using the company car to get back and forth.

confermeed not the spacer, i took that off and ran it w/o the spacer...

the door closes....... so im not sure as to wtf is going on...

finally talked to tim at zzp..

he told me the same, check the tb...
i did all looks good, a tiny bit gunky but good (i cleand it out too)

im going to send in my ecu... it has to be that....


grrrrr..... i hate when im stumped

this is a GT car right! Is there a hole in the upper plenum where the wire loom crosses?? have seen a few of these where the EGR gases burn through and give you a huge vacuume leak!
And whats the Idle motor doing??
U really need a mechanic to look at this I would be going crazy if I was you!

its a gtp and im beyond crazy!


lol

do you have a scan tool?? can you read live data!

no i cant i was using a obd2 scanner but not live data....

I wish you luck my friend it would be so nice to read what the sensors are doing in order to diagnose ..... damn really would like to help ...I will keep runnin it through my head I was doing that to day....... good luck!

Have you tried another TPS? I know you changed it once but it's not uncommom to get a bad part.

It would be cheaper then a PCM.

ok i sent my pcm to ZZP last week, they re flashed it and are sending it back to me. hopefully ill see it by friday!

but if this dosnt work, ill try another tps. and if that dosnt work, im guessing theres a blown gasket on the intake manifold or a cracked manifold..

its a zzp manifold, so if it is cracked this wouldnt be a warrentiable thing... would it?

LOL
Well a newly flashed ecu wasnt the problem..
I was figuring that maby just mabey the idle conrtol in the ecu went haywire. im going to try another tps. if its not that im totally stumped and have to totally seek pro help.