CRAZY IDLE PROBLEMS CONTINUE!!! WTF?

[91Vert]

IDLE PROBLEM RETURNS. Seemed to be gone but on ma way back from the last meet the idle was flaring up again. Really noticed the problem at stop lights mainly.Idle flares up to 2500rpm at it's peak. BUT is idling between 1300rpm n 2500rpm doesn't seem to be as often but it is till there.Sometimes it idles just fine at 850rpm -950rpm range. I was wondering if ne one could tell me whether a superchip n a lower thermostat(160) could be the problem. i don't think so because the chip has been in for about 6months as well as the thermostat which is recommended to be changed when the chip is installed but ma problem started bout 3 weeks ago?

PISSIN ME OFF. NE helpful hints would be awsome before i burn the vert n collect from ICBC. :mad: Please relieve ma headache

[3.4ltr huntin]

test the tps

[89vert]

i wouldn't say tps but i got 1 here if you want to throw it on dave
i'd lean towards IAC
or a vacuum leak
or an injector sticking but not likely
unless your gaining oil

[89vert]

lower t stat wouldn't do it
i've been running a 160 for a long time
and my car barley runs above 40 on the freeway

[CamaroRobZ28beer]

i keep my electric fan on constantly so my car always runs at 40 for temp

[91Vert]

Well when i had ma car in last week i had them run a scan to test tha computer diagnostics n the mechaqnic sayed all sensors were fine he told me that tha machine sayed it was runnin too cold ur sumpen so he topped up my coolant n it seemed to to go away but i dont drive it often maybe 2 tyms a week i have tha car fo almost a year n ihave put like 6500kms on it. So i dunno tha fukin mechanic better not have b/s shitted me ma ousin matt recomended this shop because his dad used to werk there soo ... i would hope they wouldnt try to hose me. If they in fact did well they better get a bigger hose so they can put out tha fire in there shop!
:rofl:

[91Vert]

Also before i took it in i had the TPS off as well as the idle air control(IAC) n i cleaned the intake butterfly's thinkin the throttle body was sticking but when i removed the IAC there was alot of carbon so i cleaned it off witha rag with some solvent to remove the gum and compressed the piston back down to 1 n 1/8 as my Haynes manual recommends. n i put a new o-ring on it, but the problem didn't go away so i took it to a shop.
Also if it is in fact my IAC could ne one tell me how much that would set me back never actually priced one i priced a TPS at our local chevy dealer 135$ the IAC looks a bit more complicated so am i looking at more green or less or bout the same?
Thx Fellas :up:

[allpontiacs]

Also before i took it in i had the TPS off as well as the idle air control(IAC) n i cleaned the intake butterfly's thinkin the throttle body was sticking but when i removed the IAC there was alot of carbon so i cleaned it off witha rag with some solvent to remove the gum and compressed the piston back down to 1 n 1/8 as my Haynes manual recommends. n i put a new o-ring on it, but the problem didn't go away so i took it to a shop.
Also if it is in fact my IAC could ne one tell me how much that would set me back never actually priced one i priced a TPS at our local chevy dealer 135$ the IAC looks a bit more complicated so am i looking at more green or less or bout the same?
Thx Fellas* *:up:


Get a second opinion, your car should have OBD1, correct? Get a book of codes and then stick a paper clip in the A and B ports in the diagnostic connector. Offhand, I'd say either vacuum leak or TPS. Have those things got MAF or MAP sensors?

[Drakar]

Also before i took it in i had the TPS off as well as the idle air control(IAC) n i cleaned the intake butterfly's thinkin the throttle body was sticking but when i removed the IAC there was alot of carbon so i cleaned it off witha rag with some solvent to remove the gum and compressed the piston back down to 1 n 1/8 as my Haynes manual recommends. n i put a new o-ring on it, but the problem didn't go away so i took it to a shop.
Also if it is in fact my IAC could ne one tell me how much that would set me back never actually priced one i priced a TPS at our local chevy dealer 135$ the IAC looks a bit more complicated so am i looking at more green or less or bout the same?
Thx Fellas :up:


Get a second opinion, your car should have OBD1, correct? Get a book of codes and then stick a paper clip in the A and B ports in the diagnostic connector. Offhand, I'd say either vacuum leak or TPS. Have those things got MAF or MAP sensors?



No OBD1, codes are located at Thirdgen.org, but ya paper clips and see about codes, otherswise check with 89vert.

[89vert]

Also before i took it in i had the TPS off as well as the idle air control(IAC) n i cleaned the intake butterfly's thinkin the throttle body was sticking but when i removed the IAC there was alot of carbon so i cleaned it off witha rag with some solvent to remove the gum and compressed the piston back down to 1 n 1/8 as my Haynes manual recommends. n i put a new o-ring on it, but the problem didn't go away so i took it to a shop.
Also if it is in fact my IAC could ne one tell me how much that would set me back never actually priced one i priced a TPS at our local chevy dealer 135$ the IAC looks a bit more complicated so am i looking at more green or less or bout the same?
Thx Fellas* *:up:


Get a second opinion, your car should have OBD1, correct? Get a book of codes and then stick a paper clip in the A and B ports in the diagnostic connector. Offhand, I'd say either vacuum leak or TPS. Have those things got MAF or MAP sensors?



No OBD1, codes are located at Thirdgen.org, but ya paper clips and see about codes, otherswise check with 89vert.


Dave as i stated above i have a tps for you,
i'll come out on saturday maybe, check out the chevelle too
since you are my cousin, i'll only charge you $1000 :D

[91Vert]

GEE Steve what a deal. :nono:yah i will give u call on thursday after work, ok. Should be free Saturday afternoon depends on work but i think i have Sunday off dunno yet might have a load to tha okanagan delivering monday n wednesday so i'll let u know tomorrow. If not this weekend possibly the next after month end(BUSY TIME)

Thanks Fellas for all ur input greatly appreciated. HOLLA at me if u guys ever need a mover. LOL
:up:

[allpontiacs]

Thanks Fellas for all ur input greatly appreciated. HOLLA at me if u guys ever need a mover. LOL
:up:


That may be a rash promise to make around here...

[91Vert]

LOL :cool:

[CrazyCanadian]

Did you get the problem fixed?

[90_IROC]

not yet... hopefully they will soon, my brother is gettin quite frusterated with it :fingersx:

[89vert]

not yet... hopefully they will soon, my brother is gettin quite frusterated with it* :fingersx:

i'm gonna head out to maple ditch next weekend and take a look :)

[91Vert]

Well it isnt ma fukin IAC sensor.Errrr :mad:.I just changed it n took it fo a burn its still fuked. Fuck iam seriously contemplating on returnin to a Mustang.LOL Accept the next Mustang i drive will prolly end up in the ditch too.I dunno do humans have 9 lives too it will help in ma decision i have already used 2. So its a tough one.
So if ne one else has ne ideas i am definatly ears open hopefully 89vert will come out next weekend n we can put our heads together to solve this irritating problem before i go fuckin crazy.

[allpontiacs]

Did you check the fucking codes yet??!??

[91Vert]

i had it in to a shop n they sayed no codes came up. so iam just doin whut has been suggested so far n i cant seem to hear a vacuum leak soo it could be the tps i guess? :dunno:

[89vert]

Well it isnt ma fukin IAC sensor.Errrr :mad:.I just changed it n took it fo a burn its still fuked. Fuck iam seriously contemplating on returnin to a Mustang.LOL Accept the next Mustang i drive will prolly end up in the ditch too.I dunno do humans have 9 lives too it will help in ma decision i have already used 2. So its a tough one.
So if ne one else has ne ideas i am definatly ears open hopefully 89vert will come out next weekend n we can put our heads together to solve this irritating problem before i go fuckin crazy.

i told you the iac wasn't bad possibly just dirty
i'll see if i can get the scanner from my work to see what its doing when it has the funny idle

[89vert]

i bet its the chip causing your problems

[allpontiacs]

Yeah try pulling the codes again, if there's not vacuum leak then it could very well be the TPS. You can test the TPS with a voltmeter, btw.

[89vert]

I'm gonna lean towards plugged rad

[CrazyCanadian]

not yet... hopefully they will soon, my brother is gettin quite frusterated with it* :fingersx:

Well if you ever fix it plz post what your brother did, I'd appreciate it.

[90_IROC]

so far we are trying everything i nteh book, so it may be a series of things... but will do, as soon as its running good again, we will let u know :)

[Glenn91L98GTA]

Many years ago, when I still lived on the Coast and my car was still stock, I had a similar problem (erratic idle with no codes).* It would almost sound like a cam (though it didn't have one yet).* I actually bought Diacom at that time to help try and locate the problem; it was driving me nuts.

I finally changed the EGR and it fixed the problem.*

Good Luck.* I hope it works for you.

[91Vert]

I was thinkin Egr too cuz my hanynes manual suggested the Egr as a possible problem so i will definatly take ur advice n have a look i a had a quick look but couldnt seem to see it i think it is on the passenger side by the distributor looks like a cock to change. but will do. thx.

[91Vert]

I dunno about the chip man ma bro put one in his n the idle was fucked everytime not just when the car got warm.He shorted the chip n fried it so it wouldn't work. The idle in my car is fine when u fire it up in the morning sounds perfect runs perfect. I talked to a guy i know at Lordco who's sold it to me (not one of those 18 year old punks that stand there n sell u b/s parts for a Volkswagen when u nee sumpen for a Camaro)he sayed as long as u install it carefully n avoid rubbin on the carpet of ur car(static electricity)it should be fine they're not light bulbs they don't just burn out lol. but yeah it was fine for 6months at least y would it fuck up now.

Clogged rad could be but when i drained the fluid when i changed my thermostat while installing my chip the fluid was fine green(No globs or chunkies) looked still good but i changed it NE ways so i dunno it could be but i doubt it.

[91Vert]

ATTENTION: Glenn91L98GTA
Quick question about the problem u had did it seem to run O.K until it got to normal operating temp?
Then after it warmed up did the problem get worse cuz mine is bad like avg.1750rpm n its like stuck there is no fluctuation.
Only way to get it down is by hammering tha throttle to like 4500-5000rpm then it seems to drop usualy to 850rpm-950rpm but sumtimes like around 1250rpm n holds there.

Soo.. if u reply with a yes on the warm car runs worse then when cold i will be buyin a Egr right quick.
Thx again

[91Vert]

Also could u tell me how difficult it was to change n how much u payed for the Egr? NOt that it matters but it will help if i know what iam gettin into?

[91Vert]

Well iam gunna purchase an Egr from GM tomo n prolley have results in by the weekend.Cross your fingers.Hopefullly an EGr will end my headache. :p

[CrazyCanadian]

Well iam gunna purchase an Egr from GM tomo n prolley have results in by the weekend.Cross your fingers.Hopefullly an EGr will end my headache. :p


I hope so for your sake and mine, then I can try the same thing.

[91Vert]

On my way to pick one up Now,will let ya know how it goes.

[Glenn91L98GTA]

Sorry, I didn't get back sooner. Been busy.

Unfortunately, it's been a number of years since I had the problem with the EGR (back in 1996/97 as I recall). So the prices are probably different.

It's not a hard job to do. Basically the same amount of work to install an AFPR. In fact, if you don't have an AFPR, it's a good time to add one. The most difficult time I had, was getting the bolts to line up properly with the holes in the plenum and NOT strip the aluminum. (I still had TPI at that time...and it convinced me to go to a Miniram with a one piece intake after that).

It's hard to recall exactly how it ran, but it seems that it ran worst when the engine was warmed up and up to around 1,500 rpm. It did a lot of "surging" when driving in a parking lot in 1st gear and under 1,500 rpm. Once past I was in second gear (and above 1,500 rpm) it ran fine.

Good luck, hope the fix works for you.

PS: As you probably know, I am very familiar with modifying and burning eproms. They don't generally go "bad" once installed in the car. They are either bad from the "get go" or something odd shows up within about 1/2 hour driving (when you first install the eprom). For an eprom to go bad after 6 months, they either need a good jolt of static electricity or exposed to sunlight with the "window" exposed (if the eprom is truly an eprom and not a flash prom...which I recommend over an eprom).

[91Vert]

I dont wanna sound too stupid for askin this question but what is an AFRP......? Let me know what it is exacty and i will consider purchasing one while the Plenum is still off.

:)THX for your input

[91Vert]

Yah the diassembly is dun i will have the egr tomorrow afternoon n then new runner to plenum gaskets be runnin by tomo night i hope cross your fingers for my sake!!!!!!!!!!!!!!!. :fingersx:

[Glenn91L98GTA]

I dont wanna sound too stupid for askin this question but what is an AFRP......? Let me know what it is exacty and i will consider purchasing one while the Plenum is still off.

:)THX for your input


No such thing as a stupid question.

AFPR = Adjustable Fuel Pressure Regulator.

If you make any mods, an AFPR can be useful for fine tuning the fueling if you don't have a custom eprom burnt for your. If you do get a custom eprom, then you can set your fuel pressure to a nice level (I like 48 psi) where the higher fuel pressure gives better gas atomization but not so high that your burn out your fuel pump.

Good luck.

[91Vert]

Well guys it wasnt my EGR just finished bout 10 minutes ago n i took her for a burn when she gets over 70degrees she starts the fukin high idle again. The the compression in like second or third gears will hold me down at like 1500rpm (crawling) then when i put the clutch in it flares up to 2000rpm. Just like when u put the clutch in at stop lights and when i just put it in neutral it seems to be a little high but not nearly as bad when i put the clutch in.

So... if anyone has ne more suggestions they would like to share with me it would greatly appreciated. FUCK have I been sayin that alot. :mad: :mad: :mad:

[91Vert]

Well guys this morning I'm gonna pull ma superchip just too see if it'll eliminate a possible issue with the computer. Cross something else of my check list u know. Hopefully but i ain't holding ma breath. This fucking car is the fucking devil himself. What a fucking asshole he is at that. :mad:

[91Vert]

Well guys i have sum good news n some bad but mainly good u wanna hear good news or bad first? Well I'll start with the good i pulled my super chip n reinstalled the stock chip soon as i fired her up engine light came on so i listen to ma idle at a stop the fucking idle hops between 1000rpm n like 150rpm. It's ma fucking TPS 99.9% sure. It happened too me before when i owned a mustang ???.But as for the fucking bad news ain't so bad but ma fucking speedo doesn't work anymore probably just a speed sensor or linkage i just got find it now. But never the less I'm still crossing ma fingers on the TPS but its been a good morning so -far.

If NE body has NE suggestions about my minor speedo problem let me know. THX FELLAS 8)

[91Vert]

So my optimism has turned quickly into pessimism, I just bought a TPS and installed it and the problem still exists. The idle pulsates between 100rpm- 1100rpm with out the chip. So I'm gonna reinstall the chip n see what happens because i think i have just about exhausted my options.
The car is cursed i have spent 600$ on My problem and no progress. I'm Fucking LOST. So if Ne oNE has ne more suggestions my ears are wide open. :fingersx:

[91Vert]

Well when i put the chip back the speedo worked fo some weird reason but the car still won't idle properly. So like i said suggestions are good. I just hope that one of them will finally work.

[CrazyCanadian]

Welcome to my world buddy, I have had my car looked at many times over and no one has found whats causing the problem.

[allpontiacs]

You're COMPLETELY sure there's no vacuum leak anywhere? Small ones can be hard to pin down.

[90_IROC]

yup, he is positive... no vacuum leaks, but we found the problem :D probably the cheapest part he could have ever bought... the return spring on the throttle body that closes the butterflies was hooped and wouldn't allow it to idle properly :rofl:

[91Vert]

Yeah the throttle would return back to the idle screw, ma idle was sittin a lil high too witch didnt help. when i came back n it was idlein at like 1750rpm i pushed the linkage back till it was touching the idle screw and the idle dropped to 1000rpm which is way better a little high but i 'll do sum adjusting n she'll run fine iam very confident.I also adjusted the cruise control linkage cuz it seemed to holding the linkage so i loosen it down a half notch. Fuckin wasted 650$ but whatever my car should have no problems passing aircare.The next time i will consider the easy shit first.

THX GUYS FOR ALL YOUR HELP :D

[Glenn91L98GTA]

Hope it truly is your problem. If it STILL idles high even with the new spring and re-adjusting your IAC; consider looking at your eprom (Superchip I believe I read somewhere else).

I mention this because I was helping a buddy all weekend address some "hot start" issues and found that for some reason, when we had a certain combination of adjustments in the eprom that the ECM would force the IAC Position to 160 and the idle would shoot-up to 1500-1700 rpm also.

So, if this problem does not seem to be entirely fixed OR if it returns, get a scan tool hooked up and monitor the IAC position. If it too parks itself at 160, it MAY be your eprom.

But I hope you have finally fixed your idle problems.

[91Vert]

Thx dude but it is running as good or better so i think i have finally found my problem. Might knock back the idle screw a turn or 2 but no sticky throttle n it hasn't happened since. so... I'm pretty confident that it is good, i feel stupid but.... whatever? SHIT HAPPENS!!!

THX TO ALL WHO HELPED IN MY QUEST. LOL :rofl: