Low idle and running rich
 

Ok so...I JUST took my car out tonite. Its an 86.5 7MGE engine, and it was seemingly not as powerful as it should. I assumed it was from my BHG. I just got it for 500 dollars, and I knew it had a blown head. I went to test it out, after getting the car in my name, and insured, that I should test it a bit more. I took my girlfriend home, and it was running ok. when I got back home, I went to check email, do whatever, and went to go to my aunts just a few blocks down. and...it kept dying. The engine wont hold RPM unless I rev it high, and then kinda...its not knocking, but its clunking. I hear a hissing from the back of the engine. I called the previous owner, and he told me that, Yes, he heard it too, and he and his buddy both couldnt figure it out. I have this hose, kinda "S" shaped, that I found sitting between the radiator, and frame under the hood. it has a little clamp on the end, so i know it goes somewhere. I also know with the BHG i had in my 89, that didnt affect the idle all that much, at least not enough to kill it. there is just coolant going out the exhaust chamber at times, and its not even a serious leak.

I know that when I ran seafoam through my 89, i had to pull off a vaccum line, and pour it in, which made the engine do the same thing, and make the same hissing noise.

What I would like to know, and hopefully fix, is where the hose goes, or whats loose. I cant see anything, but its also dark out, and I am not sure what is hissing, or sucking...

I read on another forum, (Supramania) that something like what im going through happened because of a vaccum leak, and something called the ISC. Im sorry to say I dont know what that is, and any help would be awesome. Pictures would help too...

ISC should stand for Idle Speed Control. Theres a good chance it IS a vaccuum leak, mainly because you said it runs okay at W.ide O.pen T.hrottle, which in most cars has its own preset fuel mixture. if it IS running rich, you probably DONT have a vaccuum leak, because that would cause a LEAN condition (too much air as compared with fuel). check the connnections at your air meter, which i've seen people refer to as an AFM on supras (all the other cars i've owned and worked on called them MAF's and MAP's...). If that sensor is bad(or has a bad connection), theres a good chance that its going into 'limp' mode and is dumping a generic amount of fuel because it's not getting an air reading. let me know what you find...good luck

Well if the blown head gasket is filling the cylinders with antifreeze that could cause it to stall out too. I just did the head gasket on my 88 7MGTE and it wasn't hissing, thats more likely a vaccume leak, but if the car sat for a while the antifreeze would seep into the oil pan and it would run fine for a while but after running for a while it would start runnning rough and then die out. At ope throttle it would run fine because the engine was exhausting the antifreeze faster than it was drawn in. If your leak isn't a very big leak then that could very well be the case. Mine on the other hand, I put a new head gasket on mine and never had the head checked. My mistake, I had to do it twice and have the head machine at a local shop here because after checking my head I foud it was warped. The machine shop had to take two thousanths of an inch off mine to fix it. Well let me know what you find.

Thats probably the case. the guy said it had a blown head, and it seems to act like it. Its fine when the engine is cold, and then after warming up, it starts to die out, and is hard to get up to speed. it kinda goes in and out of accelerating and stuttering, like its trying to die.

a while ago it was idling really rough, kinda clunking a bit and idling at 500-600, and would rev like....slow...going WOT when its just warming up, like...5 minutes after driving seems to have no affect on the power or speed.

Anyways...I found a link to buying a HG set... 7MGE Toyota Head Gasket Set (86-93) from PartsDinosaur.com..I know its cheap, but please understand, I cannot afford to do everything right now. The jackass I bought my 89 from hid every last thing from me until after the engine was running and was able to stretch its legs. At that time, that "Stop Leak" crap he put in there blew through the head, the crap in the heater core was forced out, and massive amount of coolant went into the engine and that cost 1200 bucks. plus the set was like single gasket was just for the top and I was charged 150 for that. I got new struts and that was about 540. new tires was about 520. I had about 5500 dollars to make this work, but insurance hit hard, so now im down to my last reserves of 100 bucks. I just got this 86 for 500 bucks, and it needs some minor things it seems like. at least minor compared to what went into the other one.

Anyone know how to take struts off the car...lol, kinda thinking on selling it, and salvaging what I can...lol

What i meant by rich was that when I started it up, smelling the exhaust was almost like stucking a gas can to your nose and inhaling... :(

So now we know the truth of the situation, You were huffing gasoline and was so far gone that you imagined the whole situation.... :dance:

Dude....srsly plx...Im in need of help, not jokes...

If you have any ideas that arnt listed there, please let me know :(

sorry thought it was funny lol, if there was any info i could offer you i would

hmmmmmm........ did you say that the exhaust had backfired too?

No, it never backfired. It just began idling extremely rough, and clunking as it ran. Weird thing is i disconnected the ISC started it, it idled better, small amount of clunking, but at least it wasnt dying. Later on, I put the connector back on and it kept running ok.

It seems that when its warmed up, the engine just cant live, i would assume this is due to the BHG, but I also believe I have a vaccuum leak based on what others are saying, or a hose is borked somewhere, or not connected to the right place. I will hopefully getting it to a trusted mechanic soon...thanks all for your help...sorry i am such a bother.. >_<

my first engine had thrown a rod in the bottom end and had a BHG

it would run ok while cool, which didnt last very long due to coolant not flowing through the system... lol

After it heated up the engine would just stall out as soon as u stoped, would continue going long as u didnt let off the gas lol. But it made knocking noise

Lol...is funny now... I was just a bit stressed when I wrote that before, but now I smiled... XD thanks... Made my night...

Mine doesnt really make a knocking noise... kinda a clicking noise maybe, but I figure because its running crappy.. I dunno, how bad is that...like... engine rebuild bad? ooor....maybe... bring the engine out and put a new one in :(

i understand ur frustration, i was sold a car with a BHG and a thrown rod, guy hid it well lol.... then i orderd a new engine from osaka jdm engines....

it arrived with a BHG..... lol wouldnt take back the engine only refunded me like 300 bucks.

For me it was replace the engine bad, throwing a rod in the bottom end tears up alota shit. unless ur mechaniclly inclined and can do it yourself prolly cheaper droping a new one in... just dont try to go cheap on the new engine you get what you pay for...

so it has the real problem during closed loop.....thats when Fuel Mixture goes stoich....... let me know what you find

I dont know what ti find...or what to look for. I am a noob with alot of these things...Hell, it took me like 3 hours or change tires from one supra to the other... >_<

I was hoping you could tell me how to fix it...lol

Yeah until I got mine fixed it smelled pretty strongly of gas vapors when running. Well best of luck to you on your endevor. The light is at the end of the tunnel. I was standing in your place not too long ago. I have a Haynes manual for that supra if you need it just let me know.

I couldnt agree with you more about the light, man...I just got 2 job offers, and will accept em both. both are the "on my own time" jobs, selling things...lol, not complaining, money is money. hopefully the light comes closer, and I can sell the 89, which someone contacted me about earlier, (FREAKIN' SCORE)...Hopefully they like cloth interior...thats what they asked about. and hopefully the 1200 will be enough to have the local shop fix the engine hissing...and possibly the BHG...I dont wanna bother honestly...im more of a driver, breaker, pay for it later... (I like that...I made a jingle... :D)

Anyways...thanks for the support, seems like life is finally taking a turn fr the better....

(just a few more weeks of driving a honda,.....Oh happy days!!!! :x::x::x::x:

Oh, and I got a haynes too...Chiltons or Haynes...I think Haynes...its waterlogged because I think the 89 has a leak in the back...better pull out my subs and air the bitch out...XD

Ah well, old rubber is old... :frown:

Well yay for me, i put the 89 on the internet for 1200 and got 1000 for it...im happy, and the guy is going to fix it and make it run like she should....I am happy for the car, better home that i can afford to give it.:(

Now I can work on my 86....:x:

top-tuner
 

Hi You guys ,
I am new here so greetings to everyone .....:rofl:

My 2jzgte engine runs extremely rich at idle !!!!
Does anyone know the values in volt for the
coolant and intake air temp sensors ?????:werd::mad:

Grt..:crazy2:

ok you dont need to make multiple posts of the same thing.. start a thread in the right forum (MKIV) and wait for an answer there... bump it once a day.. if you really want answered fast.. try supraforums or supramania.

1997 Starlet Turbo Idle low & rough running
 

Hi, I've just bought a Toyota Turbo Starlet. Had the car thoroughly checked out before purchase and it was good. Just drove it home and it has just started idling inconsistently and jumpy. When accelerating from stopped it makes a put-put noises up to 1500 rpms and really stalled acceleration even when you put your foot down, then it regulates at about 2000rpms. Running really rough and feels like its going to die - any ideas? I don't have a fortune to spend fixing it, so rather worried!