6G Celicas Forums

The hard idle set screw is what the throttle pulley rests on, (half moon that the cable is attached to) comes to a stop at one end of the screw. There is a small nut to loosen it up and it is a small metric alan key which turns it if i recall correctly. The throttle position sensor will be out of sync if you change the hard idle.

i still haven't found the issue.. but that shiny new alternator they sold me at advance auto parts failed already its grinding inside.. going back today to exchange it... man i wanna junk this car but i just gave up my truck and sold my Mr2 so I'm stuck with this thing until I save up enough for something else.

If I figure it out I'll be sure to post it up because this is a pretty annoying issue, having to daily drive a car that literally is shaking itself to pieces is not something I can settle for. I put it in neutral also, but it still shakes just not as bad.

got the car back, it passed inspection and the shop couldn't figure out what was wrong.. all the owner .. a tech of 30+ years could say was:

"Adjust the hard idle setting with the screw, and change the motor mounts."

I already DID change the hard idle and somehow no matter how high I put it, it wont idle higher than like 700 with it way out where 1,000 should be and the mounts aren't causing the needle to fluctuate. When I start the car, the car is searching for an idle speed that it's hardly able to steady.. it doesnt jump a lot, but it fluctuates 200 rpms at least up and down for a few seconds and sometimes at lights it dips too far, or raises without throttle input. It's like a vacuum leak but I retorqued the manifold gasket, and sprayed carb cleaner all over the engine.. the rpms didnt change and I was using a timing light so I'd have a dead accurate reading of the rpms.

I have a set of cleaned up injectors I'm going to install with new rubbers, and I'll change the intake manifold gasket with a brand new one. If the new gasket doesn't have any impact, I'm going to probably give up.. I already have the gasket so I might as well.

can you please post photos of the bumper, any deep scratches etc?

anybody closer have a bumper or no?

I'm definitely going to try this for the comfort of the ride if my fathers guy cant figure it out, because every time i stop i feel like the cars going to crumble into a pile of bolts. haha

Compression test results:

Cylinder 1: 205 Cylinder2: 190 Cylinder 3: 195 Cylinder 4: 195

It failed emissions which is the only reason I'm even trying to fix it so I can pass inspection. Drive legal my friends

The hissing sound is your idle air control valve, the clunk or girgle that is barely audible upon deceleration could be many things, the sound quality is really terrible. Could be a misfire, could be an exhaust leak causing popping sounds, could be worn exhaust hanger allowing the exhaust to bang into the underside of the vehicle when torque is applied.

If you want to find an exhaust leak, when the car is cool / cold start it up, and cover your hand with a rag or towell and cover the tail pipe (with force don't let air escape for a few seconds) if there is a breach anywhere you will hear exhaust escaping from it. visibly, you'll be able to see soot around where the hole / crack in the exhaust is usually.

Do not try this when the car has been running for a while or hot, you will get burned. Please exercise caution.

The fuel pressure was to spec according to the haynes manual, and that sucks.. a lot of people seem to be having horrible idle issues after a certain time and then nobody figures out what it is.

My brother texted me and said his boss told me to change the intake manifold gasket - says they are prone to leaking on these engines. I don't know if he knows the celica has like 5 different engines but.. If it turns out to be the intake manifold gasket I'm going to laugh... because I reused the old gasket in a pinch I was unable to go to the store, but I don't think that's it because removing the manifold and putting the other one on should have sealed it when i retorqued it. I suppose anything is possible but.. from my experience usually bad vacuum leaks don't cause a low or crappy idle they cause a high smooth idle.. but I have never seen a car idle this bad, and run perfectly off idle before.

did the fuel filter when we pulled the motor..

Just got back inside just replaced the alternator with a new new new unit, still idles just as bad as before..

so i adjusted the idle stop screw to set it higher since it idles constantly at 650-700 at most .. and that did nothing at all. I'm starting to think there is an internal failure such as a burned valve or something of that nature because the engine was pulled from a vehicle (unbeknownst to me having this idle issue) I have since replaced absolutely every sensor and everything on the exterior of the engine and not a single thing has made any impact on the rough idle or idle speed what-so-ever.

intake manifold / throttle body / all sensors / exhaust with cat complete / intake / entire fuel rail, injectors, pressure regulator, EGR valve, all vacuum hoses, PS pump, alternator, belts, distributor, entire tune up including fuel filter cap rotor wires plugs, new grounds all over, double grounded battery cable, new terminals, set timing, fresh fluids, changed motor mounts... I forget what else

This has been a tremendous waste of money thus far and I'm just going to have to pull the plug on searching for now, it's going to be looked at by a mechanic my father uses so we'll see what they have to say. If they can not figure it out either, I'm just going to make sure it passes inspection and drive it into the ground. I have an MR2 turbo I waste all my money on, this cars eating up too much. I'll post back with results from the shop in a week or so.

well, this one is from a 95 geo prism, we pulled the engine and put it along with all attached accessories into this 95 celica ST (same engines) the differences were negligible but the alt looks to be original it's definitely got no wrench marks on the bolts so it's time to spend on a new one for peace of mind i guess

New header / had to have a shop cut it at the flex and make it fit the car, ebay sent me the wrong one.. haha 02 sensors are new/er and a new catalytic converter was just installed about a month ago at meineke.

I'm gonna take your advice and order a new pigtail plug for the alternator since wiggling it makes the car die.. obviously the plug is screwed, but the low voltage output from the alt.. I will go get a new alt. tomorrow morning and install it. if it helps I will be very glad.. this cars been through a lot!

I installed the new ERG today and that was a waste of $200 bucks... That didn't help anything. I then made a new negative battery cable, and grounded it in 2 places, that didn't help either.. the list is growing.

Getting back to the alternator theory, I grabbed my multi meter and at warm idle on the battery im reading way low around 12.4 or 12.5. off idle it's around 14.4 but it differs it's either one or the other all the time it fluctuates which is leading me to believe it's either faulty wiring to / from the alternator, or the alternator itself. If I wiggle the plug on the exhaust side of the alternator the car trys to stall.. it appears to be somewhat melted visually. I guess a good LOOKING alternator can still be a piece of junk.. perhaps

Anybody have any experience with such a thing? Is it going to be wiring, or the alternator? I'll try to figure it out tomorrow it's dark and cold.. till next time

alternator is brand new 14-15+v running

just installed coil pack 15 mins ago, still shaking like a SOB lol

I'm starting to think it's the EGR valve I thought it was working properly but I ordered a new one just to be sure. dang those stupid things are expensive.... $203 shipped for the EGR @ rockauto

I'll post back when I put the EGR in when it arrives to see if anything has changed!

What a tricky tricky problem...

From research I've done online it looks like egr valves can act like a vacuum leak causing a rough idle / misfire / lean running condition at idle and that would explain why the emissions are perfect anything above idle but only HC is high at idle. I hope i hope i hope... if it's not the EGR I'm just going to either replace the head, or the entire engine although I just put this engine in the car about month ago.

installed an entirely different rail / fpr / injectors... installed entirely different throttle body and iac valve... installed other unknown sensors on firewall... still nothing yet same crappy rough idle.. still waiting on the ignition coil to arrive hopefully today.

compression is 200 190 195 195.. don't see a problem there

yes, all mounts changed. Gotta find the route cause of the crappy combustion that's causing the shake, because it made me fail emissions.

I just went to pull my pcv valve to see if it's operational and i broke it in half it was so brittle... haha i guess i won't know if it was the problem until tomorrow when I go buy a new one.... stupid small thing.. I hope that's the problem but I don't think it will be

I have never found a problem with an engine that I was unable to fix with some moderate thinking.. but with this 1.8L engine I have done the following:

Symptoms:

Car starts VERY FAST. Click vroom. Perfect. Idles 1200 or so to warm up, then drops to what appears to be factory setting around 750 or so. In park, or neutral the engine is vibrating but you don't feel it as bad. The moment you put it in a gear, R or D the entire car shakes to pieces. Touch the gas, and with a load the problem is magically gone until the next stop light... it never stalls. I just failed emissions for HC.. (unburned fuel... which made me think ignition system)


- plugs
- cap
- rotor
- wires
- coolant temp sensor
- egr check
- re-ground everything
- iac clean / check
- vacuum sensor check
- replace all vacuum lines
- checked for leaks anywhere
- set base timing to factory specs
- changed fluids
- changed motor mounts
- unplugged and plugged back in every sensor to no avail
- put on an entirely different distributor
- drained the gas tank and put in all new fuel

.. The only thing I can think of that I did not try is replacing the ignition coil in the distributor, it could be bad.. but the likely hood of both the old and newer distributors coils both being bad is probably slim... I'm going insane.

Now after messing with the TPS my idle wont go below 1,000 or so.. guess I put it back in the wrong position. Oh well, I'll figure that out later but is there anything I'm missing here? I've tried everything I searched google many times I can't even find anything else to check.

fuel pressure? Any ideas....

I have a hatch back, thank you for your offer I would pick it up if you were closer but 11 hours is a big round trip for me at this time.

I have a 95 Celica that needs a rear bumper, any color is fine but the car is black.. so obviously I'd rather have black if I could choose. please let me know your bumpers price, color, (please have some photographs ready) and where it is located.. thanks!

The cars



Engine ready to pull



Engine ready to pull



Engine out of Celica



Junkyard bound... stripped of course



Engine out of Geo



Some fun



Engine going in Celica



Axles in w/ new stopping gear



Modified mounts, drilled geo brackets a bit to the left to fit the celica mounts (necessary) The brackets are definitely different.. best idea would be to use the celica brackets and mounts only.



Engine in and running..



First startup Video:
It's alive... runs & drives no check engine lights. (after startup, timing was set, and fluids checked filled.) Loud... open header at the moment.. ebay made in china CRAP. Doesn't fit.

http://www.youtube.com/watch?v=tvGtlIv0Uis

Edgars cool, I'm sure he didn't mean to send me here if nobody could use it, maybe since the turbos are both called CT-26? Anyway I'll try to find a forum where it fits cars. The Supra forums is full of know it all idiots - I stopped wasting my time on that site years ago.

Thanks guys, and I'm sorry the Turbo won't fit the Celica, I was misinformed I apologize. I guess I will try ebay or craigslist or something like that.

About the Supra - i get a lot of guff for it being auto n/a but I waited 13 years to buy a supra. This vehicle was as close to showroom / mint quality as I had ever seen any used car be in. 1 owner cars are very hard to find, especially cars that are only 1 of 55 (this one.) I just couldn't pass it up.

It's all stock, 97 limited anniversary edition N/A targa auto. I bought it to save as a collectors car so the N/A part didn't matter but I ended up liking the car so much even as non turbo that I drive it anyway. This is the car that Edgar called "annoyingly slow" while bashing all his friends cars in another thread of his. He is lucky I even let him drive it.

Just wondering why anyone would post stuff for sale thats too good to be true? I am a person who likes cars just like the rest of you.

www.myspace.com/youknowmyurl thats me, if that help you feel better about spending $95.00 on a turbo.

A member of this forum named Edgar (used to own a black GT-2 and sold it to another member here who somehow blew the motor) was the one who advised me that celica owners could use this turbocharger. Yes it's the single entry turbo from a Supra, I wasn't aware that it doesn't fit the Celica. I own a 97 Supra so I have no use for it, and the price is good because he also told me it was worth "$90.00 max."

I guess he lied to me but thats besides the point, anyway sorry if this won't work for your cars I really didn't know that. I thought the only difference was the single or twin entry design.

If you can use it, it's still for sale. Sorry for any issues with this turbo's fitment guys.

- Brett