Does anyone know of a good rebuild kit for a 940 Sedan Turbo? I'm not sure which turbo it is, but it has 220,000 miles on it without ever being rebuilt. This morning the car started to idle poorly when sitting at a traffic light, and the check engine light came on. This lasted for about ten seconds and then it stopped and the light went away. I was thinking it might be an excess of pressure on the turbo or something, perhaps the blow-off valve is clogged? do these cars even have a blow-off valve?

Thanks for your help!

 

The turbo is most likly a TD04H-13c. I would take of the front turbo intake hose and see if the turbo shaft has any play in it, by moving it.
I dont thinkthe check engine lightis the turbos fault, and it should last you a long time.
Mine TD04H-13c has about 256,000 miles and it is boosting @11psi, and it is still in great shape.
What year is your car? if it -93 then chech the codes with the OBD1 box on the driver side strut tower.
If it is 94-97 then it should have OBD2, then you will need to go to Autozone and have them read the codes.
These cars have a CBV which is like a BOV but it vents back into the intake manifold.

 

The car is a 93, so How do I pull OBD-I codes on my own?

 

Check out this: http://www.troublecodes.net/Volvo/
It will tell you how and gives you the full list of Codes.
Once you know what the code is you can post it here if you need help.

 

thanks a bunch! I know what I'm doing with this sunny 60 degree day now!

 

Any time.
hope it is nothing serious.

Good luck.

 

I got a code of 3-1-2. But that is not in the list of codes at that link you showed me. Do you know what 3-1-2 means? Thanks!

 

Code 3-1-2 is the Knock sensor. It is faulty signal and might/will need replacing.
The knock sensor is located under the intake manifold mount on the block
The red arrow is pointing to it:

 

Holy crapola! That's what it is? that connector isn't even connected to anything! Shouldn't it not be running if that is not connected?

 

Whoa! just connect that and you should have no more check engine light. the car will run with out it, but it wont send any knock readings to the ICU. your car should run/idle better now.

 

Turned out that it wasnt that plug, for some reason my wiring harness has two leads there because it splits. Anyway, it turned out to be the idle control valve. And also a distributor and rotor that had seen 225,000 miles. Terrible. I was in awe when i opened it up! So, now it feels like a whole new car.

 

Cool!

Keep up with that maintenance from now on, and she should last you many more years to come!

Good luck.

 

TIPSP,

Wow! What a clean engine! Puts me to shame.

 

Thanks, actually it has seen better days.