Its been a while since I have been on the forum or posted an update so I figured now would be a good time.

https://www.rx7club.com/forum/showth...hreadid=145238

Right now the car starts, sigh, and it runs. I had a blown turbo to manifold gasket (even though it was brand new) and that stoped my exhaust leak...OR so I thought.

The car is now MUCH quieter but after I drove it home from my buddy's place and popped the hood, I noticed about every 30-60 seconds a poof of smoke comes out from under the turbo area, maybe a leak of some sort???

The car doesn't seem to want to make any boost...I am kinda confused on this one, I have my manual boost controller opened up quite a bit, I never hear my BOV go off, my autometer boost gauge doesn't move, but my factory one moves a *little* bit when I hit it.

My idle is at about 1500-2000, I tried spraying carb cleaner around vacume hose area...no results.

Needless to say the power ain't all that great, since I am not making any boost though I am not surprised. I tried doing searches for these problems but get overwhelmed with things with other symptoms ect and I get confused...

I am pretty sure all the vacume hoses are on right, I did have some problems with the three that go on the back of the UIM and which order they go in, I know the bigger one went on the bottom but the upper two I wasn't sure. Besides for that all the hoses look like they are on good...

I have had some VERY excellent help in the past on the forum, hopefully I'll get this car up to a 100% soon

Note: the spark plugs are new, all minus one of the trailing since the new one broke. When driving on the highway in fourth gear at 3k or so it didn't want to go any faster no matter how much gas I gave it (I had to downshift) I know thats low RPM but I never had a problem before... Oh wells, I know its a lot of info but can anyone help? lol

TIA

Dan

 

bump

 

On a side note my turbo was glowing red today when I let it idle in the garage to try to find the poofing smoke mentioned above.

My buddy told my that I had a lot of unburned gas coming out, and from searching (hey thumbs up!) I infered that running rich can cause the turbo to glow...am I right on this?

I tried turning the idle adjust screw on the BAC but noticed no effect at all. Does it sound like I have a air leak among other problems? Perhaps around the UIM?

If anyone has ANY info I'd appreciate it, I need my daily driver back, soon I will be out the car I am borrowing, thanks!

Dan

 

Still stupmed on all of this, done a lot of searching but am having a hard time isolating symptoms. Could the BAC possibly be a culprit of some of this?

I dunno I think in frustration I am just starting to shoot in the dark. I've pondered intake leaks, UIM leak, Pressure sender, Hose going to BAC just above the turbo, shot turbo, water thermo sensor, Clogged exhaust(although very doubtful since no cats) it seems everything. I just want to be pointed in the right direction.... I am making no boost with a 1500-2000rpm idle. Anyone? Any ideas at all? I'm desperate and broke! lol Thanks!

Dan

 

just another bump

 

check your tps. make sure it's set. take off your tid and check your compressor wheel. make sure you didn't blow your turbo.

 

Not the water thermo sensor - I've been through that.

Don't see how the BAC could be responsible. It's easy to test, anyway. Check it's resistance when it's hot and when it's cold. The FSM will tell you what the range should be (don't have an FSM in front of me right now.) Be sure you check both hot and cold - I checked mine cold only and it was in the range. I later checked it hot and it was above the suggested max - the unit was garbage. You can also unplug the BAC with the car idling. If the idle doesn't change the unit is toast - at least that's the case with NAs.

A vacuum leak will give you a rough idle. A high idle is something else. Check the Air/Fuel Meter (search the Forum for how-to.) As suggested, check the TPS.

Setting the TPS on a turbo 7:
http://fc3s-pro.com/TECH/HOWTO/TPS/tps.html


You're saying that it won't rev over 3k *ever* or just on the highway in 4th?


And what kind of exhaust do you have on the car? How big are the pipes? Got headers? Pre-silencer? Who made them?

 

It will rev over 3k when driving, and in neutral, but on the highway it just kinda stayed there.

I figured a vacume leak would be a rough idle, thats why I was confused. When the car is first started it stops at 750 for a hot second, then it goes right up to 1500-2000.

I'll try to get my hands on some equipment so I can test the TPS, I didn't mess with it but once again....not ruling it out. Thanks for the help, let me know if I can answer anything else.

For exhaust I have a 2.5" Bonez DP and the Bonez 2.5" Cat replacement pipe going to the stock cat back exhaust.

I was hoping that nothing failed since everything was working when the car was taken apart, but as I have learned, I should not rule anything out...

Dan

 

Check out this thread. Lotsa stuff to check.

https://www.rx7club.com/forum/showth...0&pagenumber=2

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Turbo glowing red may not be bad:

https://www.rx7club.com/forum/showth...=glow%2A+turbo

Check out the pics!

https://www.rx7club.com/forum/showth...=glow%2A+turbo

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Let us know what adjusting the TPS does. The more I read the more I believe that adjusting yours will take care of both the idle and the low revs...

Check your intercooler piping.

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Check this thread out:

https://www.rx7club.com/forum/showth...light=no+boost

 

While searching I came accross those posts.

My concern however was the fact that it was glowing red after just idling for a few minutes, not after hard load...I think its due to running rich, I am currently trying to save up for an S-AFC

I have checked out the piping and it does look ok...but I will double check all connections of course because I do not want to rule anythng out.

I do not think I have a clog in my exhaust system since its all open except for the stock cat back...who knows lol

I will try to adjust the tps but need to get a hold of the eequipment to try it.

still stumped lol

Dan

 

First, remove the boost controller and run the wastegate lines unmolested - does it make any boost?

You might want to pop the TID off and inspect the turbo wheel by hand.&nbsp See if it spins nicely without hanging up.&nbsp If the turbo seized, it can cause that glow-red problem you've been having.


-Ted

 

Thanx for dropping by.

 

Haven't checked the thread in a while lol, I will do that today and get back to you guys.

THANKS!

Dan

 

check your timing, sounds like yor timing is running to much retard. this can cause turbo's and exhaust to glow red hot from just idling........Have you played with the cas it could have skipped a tooth. And likethe others said check your tps