questions need answered asap

[Midnightryder]

ok ok.....my 87 fiero gt is ruuning good until i noticed something today....i was sitting at the light it is a 5 speed right...i was in neutral and it would rev up to 1700 rpm and then go back to 1500 and then back up...i did have the air on would that affect it? ....and i was checking it outside a min ago i turned it on without the air on....and thwe volts only went a lil above 13...and when i shut the car off...it seems to shut off hard....

plus i have also noticed on the car my oil pressure....when it is ideling it goes from lil above 40 to 80 and the car's sound gets real deep and then it jumps back to lil above 40....so i am not sure about that...ya know

someone plz help me

*note i did put on a new ultimate dogbone today....it will do anything....by means of shuting off rough? also i had to pry that damn thing so much for it to get in there....and now when i rock the car the engine does not move at all man....not even a little give

*note...i need to know as soon as possible becasue i got to go to places soon and i dont want to wreck it anymore than it is ya know...

[Ragtop_Renegade]

You might have knocked something loose - loose plug wires would cause arching and make the rpms jump all over. If that's the case, the crazy oil pressure might just be from the engine rpm fluctuating. I wouldn't worry to much about the charging system, 13v is plenty.

[Midnightryder]

alright well i will go check all of the wires and see....could a loose wire also cause the thing to shut off a little hard?

[Midnightryder]

new problem- ok now the car when is sitting in nuetral at a light or something revs at 2000 rpms...and then the check engine light comes on....the temp shoots up and oil pressure goes way passed 80.....the light goes away when i start going again...but comes back when i stop.....i dont know whats wrong with it........anyone please i need help asap!

[Old Lar]

http://www.fiero.nl/cgi-bin/main.cgi?ECMCodes
Follow the instructions on how to obtain and read the error codes in a Fiero.

High idle means EGR, vacuum leak, or sensor problem

[Midnightryder]

besides high idel...the check egine light comes on and it shuts off hard as hell....

[Midnightryder]

i just dropped it off at the pontiac dealer and they said it will take bout 2 or 3 before they can look at it....(check for the problem) then they said they might not be able to fix it, so i said just tell me what is wrong and i will fix the fucking thing....i think that guy got kind of scared of me lol anyways we will see.....anymore ideas on what it could be

[Midnightryder]

could the problem be the throttle position sensor?

[Ragtop_Renegade]

if it's loose and vibrating, yea, you bet. At least the weird idle. The oil pressure is something else... maybe a bad gauge sending unit.

[Midnightryder]

well i will know monday hopefully....but that is what my dad thought it was...so i was just wondering....kind of weird sitting a light in neutral and your car starts reving up lol...

[Midnightryder]

well the problem is a vacuum leak which sucks becasue they took off the plenum and found it....the pipe is broken plus i think the seals too...well they told me about how much it will cost plus the seals and shit will take a day but the pipe that is broken is discontinued so they are going to try and weld it together....so i hopw to see my car by wednesday maybe shit they have had it over a week.....i just hope that pipe does not break...cuz i am wondering how long it will stay togerther if they can weld it.....

[Ragtop_Renegade]

Don't you hate those sneaky vacuum leaks?
Rather then them welding the pipe, try getting a used one from Kick Hill

[Old Lar]

Does pipe mean EGR tube?

EGR pipe: PN 10137017 available at www.gmpartsdirect.com for $58.17 plus shipping. Lists at $102.05.

[Midnightryder]

yeah i hate sneaky shit...=( but at least this is the problem......even if they do weld the thing...i could still get one later and put it on right??? ya know just in case it breaks.....that probably is the pipe but i am totally not sure...(you guys always seem to be right, so it probably is) lol...all i want is my car back =.....(

[Ragtop_Renegade]

As long as they don't tig weld the damn thing to the intake lol
If it were the EGR tube I can't see how it would be discontinued, being a required emissions part you couldn't (in theroy) pass a smog test without. Probably the vacuum port for the power brakes or something.