got scrwed by mechanic, please help me fix the problem......

[mark2249]

Hey guys,
I have a cali spec 94 3000gt base. I blew out the engine so I got used engine from japan. I had a not so good but cheap mechanic put the engine in and he put it just fine except( and I found this out later on) I think he clipped of the egr pipe that connect to the intake. His shop is now closed so no one works there anymore, it was more like a junkyard really. I started finding out problems when I failed emissions testing for too much nitrogen oxide(correct me if i'm wrong) in the exhaust, problem that the egr fixed except its not there anymore. I noticed that some vacuum lines that were located on top of top left hand corner of the engine were also unplugged and missing. could it be that these lines were the one recirculating exhaust gasses in the intake??? I also noticed that the car ran more (even with new plugs adn wires)rougher but acceptable than before, could it be from the missing vacuum lines???Please help.......Thanks in advance.

[carlos80]

you mean nitrides of oxide(nox)
to answer your question the missing vac. lines could cause nox depending on how big the leak is, i'm not too familiar with your particular car but the IAC in most vehicles will compensate(by allowing less air to bypass the throttle). try to find a vac. diagram and hook thoose lines up. your nox problem is more likely to be from the inoperable EGR valve. the air that is injected into the intake, takes up space in the combustion chamber and does not burn, so it reduces the temperature of the chamber. this in turn reduces nox production which occurs at 2500 degrees F.

[Igovert500]

Ok, so I've got a few ideas, but first the more info we have the better. Are you getting any CELs (Check Engine Lights)...if so, go to Autozone and get them to scan the ECU(they do it for free) and find out which codes you are getting.

2) What exactly makes you think its the EGR...did the inspection guys tell you it was?

3) When you say clipped the egr pipe, do you mean the mechanic split it open and it is leaking...or that he removed it entirely...becuase if he removed it entirely, he would have needed to make 3 blockoff plates. The vacuum lines aren't what recirculate the air back into the intake, there are there because the EGR valve solenoid is controlled by vaccum pressure. Also what year engine did you get, was it fed spec or cali spec, because some fed spec 91-93 motors didn't have EGRs (so I've heard), so perhaps the engine you got didn't come with one at all.


4) You said the car ran rougher. This again sounds like a vacuum leak. Does your idle seem to be a bit erratic? When your engine is on, and you stand where these supposed vacuum lines are supposed to be...do you hear hissing from air escaping?


If you go here:
http://www.stealth316.com/misc/3tim.pdf
(wait for it to load, as it is a huge document that opens in adobe acrobat)
On the bottom on page 55 shows a diagram of the emissions contol system

http://www.stealth316.com/images/vacuumhoses.gif
here are similar vacuum hose diagrams, they are for twin turbo models, but I think the egr part should be the exact same.

http://www.3si.org/forum/attachment....chmentid=45639

And another, 96 TT model, but should be similar. EGR vacuum lines to solenoid are circled in red.

http://www.3si.org/forum/attachment....chmentid=45640

This is same picture as the last one, but shows how the vaccum lines could have been rerouted to avoid EGR solenoid. If this is your problem, (hopefully, as it would be easy to fix) you could just buy vacuum lines and hose clamps at any autostore and run new lines and fix it.

http://www.3si.org/forum/attachment....chmentid=20812
This is a pic of a guy who removed his entire EGR setup...notice the difference.


Lastly, this site has pictures taken with the plenum outside the car with the EGR removed and blockoff plates installed. This will give you a better idea as to where you should be looking for the EGR ports in your plenum.
http://rdmelton.autoeducation.com/ca...urbos.html#egr


So basically, are you:
1) missing the entire EGR system because you got a different engine?
2) missing the entire EGR system, and you either have a huge hole in the back of your plenum, or it has been blocked off?
3) It is there but the pipe is leaking?
4) It is there, but the vacuum hoses aren't connected so it is inoperative?

If you can take pictures that would help a ton as well.

[93_R/T_TT_Stealth]

Originally Posted by Igovert500

Ok, so I've got a few ideas, but first the more info we have the better. Are you getting any CELs (Check Engine Lights)...if so, go to Autozone and get them to scan the ECU(they do it for free) and find out which codes you are getting.

2) What exactly makes you think its the EGR...did the inspection guys tell you it was?

3) When you say clipped the egr pipe, do you mean the mechanic split it open and it is leaking...or that he removed it entirely...becuase if he removed it entirely, he would have needed to make 3 blockoff plates. The vacuum lines aren't what recirculate the air back into the intake, there are there because the EGR valve solenoid is controlled by vaccum pressure. Also what year engine did you get, was it fed spec or cali spec, because some fed spec 91-93 motors didn't have EGRs (so I've heard), so perhaps the engine you got didn't come with one at all.


4) You said the car ran rougher. This again sounds like a vacuum leak. Does your idle seem to be a bit erratic? When your engine is on, and you stand where these supposed vacuum lines are supposed to be...do you hear hissing from air escaping?


If you go here:
http://www.stealth316.com/misc/3tim.pdf
(wait for it to load, as it is a huge document that opens in adobe acrobat)
On the bottom on page 55 shows a diagram of the emissions contol system

http://www.stealth316.com/images/vacuumhoses.gif
here are similar vacuum hose diagrams, they are for twin turbo models, but I think the egr part should be the exact same.

http://www.3si.org/forum/attachment....chmentid=45639

And another, 96 TT model, but should be similar. EGR vacuum lines to solenoid are circled in red.

http://www.3si.org/forum/attachment....chmentid=45640

This is same picture as the last one, but shows how the vaccum lines could have been rerouted to avoid EGR solenoid. If this is your problem, (hopefully, as it would be easy to fix) you could just buy vacuum lines and hose clamps at any autostore and run new lines and fix it.


This is a pic of a guy who removed his entire EGR setup...notice the difference.


Lastly, this site has pictures taken with the plenum outside the car with the EGR removed and blockoff plates installed. This will give you a better idea as to where you should be looking for the EGR ports in your plenum.
http://rdmelton.autoeducation.com/ca...urbos.html#egr


So basically, are you:
1) missing the entire EGR system because you got a different engine?
2) missing the entire EGR system, and you either have a huge hole in the back of your plenum, or it has been blocked off?
3) It is there but the pipe is leaking?
4) It is there, but the vacuum hoses aren't connected so it is inoperative?

If you can take pictures that would help a ton as well.

excellent info sources an sollutions!