ok so i took my uim off for polishing... after i was done i put every thing back together. I conected every thing in its right place (i believe) and i go to start it up and i get an engine check light, so i diagnost it and figure out that it is the throtle position sensor, well i for go to plug it back in. so i plug it in and start the car and it runs pretty smoothly. after a few seconds the "add coolant" light comes on. so i put more coolant and water in and start it again. no light when i start it up so i take it for a test drive, and as im driving it comes on again. so i come home and when i pull up i notice that the idle is studdering going from 1100 rpm to 1400 rpm up and down. so i look below where u fill the coolant and there is a puddle of coolant, while i was under there i noticed that there was another puddle of cooland towards the back of the engine block. so i dont know what the hell is going on. can u guys shed some light? thanx!

 

If I remember correctly, there's a coolant line that goes into the back of the TB. Maybe it popped off or is loose, check that.

 

i just checked it and its fine. every time i try to add coolant it just leaks out but then my stupid add coolant light comes on. i dont understand why. my idle is ok now. but now for some odd reason my turbos are hitting 14 psi primary and secondary (they were fine before i took my manifold off but like i said im pretty sure i put every thing back in its right place)... this is crazy and i really dont know why some one please help me!

 

14 psi sounds like a popped off wastegate hose... that 14psi is not likely related to your coolant loss issue.

technically, most coolant lines are to the front of the engine... so it is being transported there from a leaking hose elsewhere.
study the coolant routing diagram and see if you can trace likely suspects.

 

a poped waste gate hose? hmm ill go and checkn it out.

 

Yeah, either that, or check the vac line to the WG control solenoid.

Hey weetbix, how's your FD doin'?

 

First things and well most important you need to figure out where that coolant is leaking from... on the top of the back of the block you want to look and follow that coolant line... Goes from the throttle body to the rear iron. The safest way to find leaks like this is to find a pressure tester. Some places like Autozone and even Kraigen will let you rent one for free with just a deposit. Then you can put pressure in your cooling system without running the car.

How much coolant did you lose when you took off the Upper Intake Manifold? You could have just induced a bunch of air into the lines... but as your first post was saying is you saw there was coolant around that TB line on the block..

Definately avoid driving the car until you can get the coolant nice and happy... Check all hose clamps maybe you accidently put a small pinhole in the TB line just from bending it around + age of the hose... Thats one of those hoses I would replace everytime it looked funny at me just becuase of how tempermental these coolant seals are.

Ill try and think of some others to look at... watch out for those high boost levels... I think on the stock ecu you're borderline fuel cut there.. I am not 100% on that though..

 

thanks brian, ya i am hitting fuel cut at 14 psi im pretty sure. and when i took my manifold off i didnt loose any coolant. also why when i try to put more water into the coolant filler it just leaks right out? and the leak from the rear of my engine is real minor so i could just be a small pin hole but i did notce that the side of my engine block had liquid on it.

 

stock ECU fuel cuts between ~11.7psi - ~14psi depending on revs and throttle load.
you're right up there.

two potentially disasterous issues here... be careful and precise before you drive her again.

 

Well there's another hose which is right below the oil filter... It just so happens that the hose tends to get nice and spongy when oil is spilled from a oil change... I had this hose burst on me on my FC. You might check out that hose to see if its the potential cause for your small leak.. that could explain if you have liquid on the side with the spark plugs/driver side... so check out that hose..

So when you are filling from the normal spot its just over filling and spilling out...? Sounds like some air in the system.. sometimes the best way to bleed air out of the system is to pull off that upper throttle body hose. (at the throttle body) Since its one of the highest points in the cooling system the air will want to exit there. Then you can make sure at that point that you have water there..

Even those tiny small leaks are going to eventually put too much air in the system... so definately don't shrug it off before it poententally causes many many more headaches...

edit: I am trying to find some batteries for my digicam so I can show you what im talking about as sometimes pictures just help...

 

Hold on...when you say, "where you fill the coolant"...are you talking about the resevoir near the passenger side headlight? 'Cause that'll easily overfill and spill with coolant without any getting into your engine.

You want to fill the coolant at the waterpump. Pop off that radiator cap looking thing (for some people it might actually BE a pressurized radiator cap) that lurks between your airpump and your alternator area-ish. Then, after that's full, make sure you add a little coolant in your resevoir (near the passenger headlight). That'll "suck" into your cooling system over the next day or so, so check the levels at both places again.

However, if you ARE filling coolant at the water pump, you may want to check the large radiator hose that connects to the bottom of the water pump. I remember I had a loose clamp there that once leaked a bit of coolant on me. It could also be an old hose that's split. Who knows? As it was mentioned, that coolant line to the back of your throttle bottle could be leaking for one reason or another.

Of course, this only addresses the leaking coolant issue.

There's also one remote possibility that it's your idle speed controller got a bit dirty during your polish job. Check out Dale's website here for that: http://www.clubrx.org/default.asp?id...ntent=63&mnu=5

It's near the bottom.

Again...these may only be "pieces" of the problem. Sometimes the bottom falls out and a whole bunch of things happen at once. Good luck!

 

ok so i found the boost issue and its not a simple fix. weetbix13 you were rite about the waste gate hose, except its not poped off... the nipple that the hose conects to on the solinoid broke off. so i will have to buy a new one, do u guys know where i can buy a new solinoid (not from the dealership). and ill go and check that coolant hose now.

 

actually i did both just like you said. when i filled it up at the thermostat it was almost full, but the light still came on, then i started filling it at the resevoir and it started spilling every where.

 

Depending on which one you need I might have it sitting around from my rebuild... I will try and dig up the solenoids.. you talking about the ones right under the manifold.. not the rats nest.. but the two solenoids which are next to one another..?

 

Just get it from a dealership ($150) or post up that you are looking for one.
everyone running a single removes those solenoids... or put a boost control in place of the solenoid... lots of options.

 

yep, those are the ones he means.
turbo precontrol and wastegate control - they are bonded together so he'd need both.

 

Hey, I was the one that suggested the solenoid!! Weetbix stealin' my props, damn kiwi! j/k.

Check the classified section on the forum, you should be able to find a solenoid very cheap. Glad you found the issue, now about that coolant loss......

 

ya the ones directly under the uim. its the waste gate solenoid the one on the right side. brian if u found one laying around id appreciate it greatly!

 

sorry yuichiror, well thanks every one

 

u can replace it w/ a BC???

 

I will look around and see if I can find them... I may have broken mine as well way back when I pulled the motor.. I seem to remember buying a set from the dealer as well. I will let you know if I find anything...

 

yep, can just swap that out with a bleed or ball and spring valve for adjustable boost.

 

i was being general in my hose comment... anything from the solenoid right through to the actuator.

Yuichiror and i are both legends - and such is the brotherhood of the rx7club.com!

 

http://www.42below.com/flashad/fosters.html

talking of damn kiwis stealing props - and completely unrelated... have a laugh!

 

ok thanks brian, now abou my coolant issue, i took that hose off that connects to the TB and i heard an air noise like air escaping, and then followed a little bit of coollant coming out then i put it back on. i dont think i know which hose u are talking about brian (the one thats by the oil filter) i dont see any thing leaking or disconected any way...