Hi
2 days ago , I just returned of my mechanic after replacing the knock sensor for me they tried and tried (after I insisted) to remove it without taking anything out from the engine bay (but ofcourse they failed)...Asked me to remove the IM , and stupidy I accepted..they removed the entire Intake manifold then they replace it and they found the 2 IM gaskets are bad (as they said,I don't know it's true or not) ... then the time was about to close their garage so they were on a rush to return all the parts togther to give me the car.....After all , nothing magical happend the car ! rather than slight better acceleration (never worths all the pain and removing many electrics and parts I would be very scarred only to touch !!!!)

Now the problems are :
1-The idle (at stop light) is coming after 10-12 seconds to 500RPM and the car seems to stall (but it doesn't) then slight shake in the engine in that low RPM........at the morning the RPM jumps to 1200-1400RPM when I switch the car on , but normal when the car is normal temp. (650-750 RPM on neutral)

2-I notice a "HISSS" sound from the engine side or around the throttle body , like an air flow from hose ? or leak from air flow from gasket they replaced ??

3-Some fluid leak , mostly coolent below the engine area I notice on the ground at the morning , lasted 2 days , then seems off now (the coolant reservoir is 2 cm below the level it used to be)....does this have any relation with no.2 ???

Please any advices on the issues above..thank you
I regreted all that now..advice for people not to take their IM to remove that crap KS.........only problems you get...

 

You'll get problems if you don't know what you're doing, sure.

Otherwise, no issues. I'd had my UIM off dozens of times now...problems? Nope.

Anyway, since they just did the work, why aren't you bringing it back to them?

Temporary low idle when stopping and the hissing sound may both be attributed to a cracked or completely disconnected IACV feed hose.

That, or a dirty IACV and a big vacuum leak.

Coolant doesn't hiss More than likely one of the various coolant lines that have to be removed to remove the UIM was damaged or not put on properly.

Again, just take it back to the shop.

 

The IACV is the black compound connected to the throttle body (with the air filter)? I examined it and nothing seems abnormal ...

 

No. The IACV is just aft of the throttle body.

And it doesn't have to be dirty on the outside to be dirty on the inside.

 

A massive vacuum leak could also cause hissing. Make sure the shop checks all of the vacuum hoses and makes sure the IM is seated properly or if they used the right gaskets.

 

LOL. I've removed my IM many times to do upgrades etc, no problems after the fact whatsoever. Clearly your mechanic rushed the job as you stated, most of your problems are a result of this. Take it back as stated.

The minor coolant loss is directly related to removing the IM. If it continues to diminish, you have a problem ie leaking hose at back of IM etc..

 

^^^

+1

Probley the line that goes to your tb and then behind your upper that usually are not in the greatest condition

 

Easy to clean, but you need to know what it is first. lol

 

I tell my wife that all the time. lol.

that is all.

 

^ Oh man, haha. That's amusing.

 

 

GOT IT

My EGR valve is DEAD..........leaking air............what to do ? (can I leave it without problems) ?

 

What do you mean leave it? If it's your current problem, what in the world makes you think that you can leave it as it is...without problems?

You can remove it entirely, replace it...all up to you.

 

Codes I have now
P0400
0171
0174
I mean , will it make me sitting of a junk of metal in the middle of the road?

Can it affect performance (other than the hissing sound) ?

Can it be repaired ? cleaned and reput back in its position ?

 

If it's causing your current problems, then why would you not fix it?

I'm really not understanding why if it's the source of your problems, you want to leave it as is. That makes absolutely zero sense.

Yes, it'll affect performance. If it's leaking air, you're running lean. As your codes show, actually. Both banks are running lean, probably dangerously, depending on the amount of air leaking in.

What exactly is leaking air? The EGR valve itself? The EGR guide tube? What?
And how did you diagnose that it's 'leaking' air?

 

Dear Prmhr
1-YOU VERY FAST
2-I picked up a mechanic to diagnose it ...after some here and there checking he said EGR valve/or the tubes around it hissing and making the leak ...pulling the codes too...suggested to replace it,called some shops to get a result it costs 135 $ ...I returned home a-to check prices again (I discovered it's 125$)
b-Might replace it my self if I can

The other issue I added some radiator coolant today to the max level in the plastic jar to the side of the car ..Now it's 3 cm below !!! can it be a coolant leak ? I hear some water flow just infront the dashboard when I coast first min in the car !! might be another hose leaking water ...but the loss everyday seems alittle only when begging a new jouney with the car !!!

 

Did you not check the coolant level in the radiator? Have you bled the system? You've got air pockets in there now, that's why you're hearing the waterfall in the heater core.

Without knowing exactly what it is, there's no way we can tell you what to do. Did you use a new EGR guide tube gasket when you put the UIM on? I assume you pulled the EGR equipment from the original VQ30 when you installed the DE-K, as they're not the same.

 

what DE-K ? and what tube ?

 

Oops, mixing up threads here.

Again, why haven't you taken it back to your mechanic?

If they didn't use a new EGR guide tube gasket, it'll likely leak there.

 

^^^^^






Pmohr couldnt of said it better!!! If your egr is leaking you are getting unmetered air causeing more than expected air to enter your engine. causing you not to get the correct mixture of gas and air!!!!!!!! which needs to be taken care of asap!!!

Also you really shouldnt be filling the reservoir with anti freeze. You should be filling it up at the radiator when its COLD.

 

Just thought I should post these while in subject


yup, thats gonna need new gaskets alright


Heres one more for ****s and giggles

 

"Dear Pmohr:" ROFL

I'm just along for the ride on this one. I think it's very funny when people try to 'fix' things they know and understand nothing about.

I think it's a good idea for you to take your car to a mechanic (and I'm willing to say most anybody at the shop is more qualified to work on your car - they had to know something to get a job there) and let them fix it.

 

It's not funny, until it happens to somebody. Hah!

I have the same problem, but have solved it, ever so much, by getting the new EGR guide tube gasket in place. I think I'll check the hose lines tomorrow to make sure I didn't forget to connect one in

 

pmohr, I fuzzing love you.
Pwning noobs since ... whenever you started pwning noobs.

 

so you started as a power member Mr.know-it-all from the uterus ? ...........by the way , you know what the uterus is ?

......and to the community,that was a long ago,turned at last to be a misplaced EGR guide tube gasket..........the guy who did the job fixed it in 3 minutes........ (it was a real noob style thread)

 

we were all newbies at one point. i wdnt sweat it man

 

Im a newb. What is the best intake for my car??

 

Remove everything and attach a cone filter directly to the TB.

 

ColumbianMax,

Is that a cash register drawer holding your IACV?

 

i got really excited when pmohr was posting, oh wait. its a dead thread, and for future refrence my UIM is held on by 2 bolts. no problems.