Running Rough..

sisco850t · Post by **sisco850t** » 27 Nov 2009, 20:39

My Volvo has been starting a lil ruff, once its started i have to give it a lil gas or it will bog down and die then it will idle and run fine any solutions?

Post by **Ozark Lee** » 27 Nov 2009, 22:51

There are a number of things that could cause your problem. Since you have a '95 you can read engine codes from the OBD-I (A/B) boxes under the hood. Pull the codes from ports A-2 and A-6 and post them back.

Here is how to read the codes.

http://volvospeed.com/CheckEngine.php

That writeup is specific to port A-2 but the same thing applies to port A-6, just plug the flywire into port number 6 to get the A-6 readings. Depending on your ECU system port A-6 may or may not give you any readings at all.

...Lee

sisco850t · Post by **sisco850t** » 27 Nov 2009, 23:28

Ok i did it 3 times 1st time 2-3-1 2nd time 2-3-2 and 3rd 1-2-1..

sisco850t · Post by **sisco850t** » 27 Nov 2009, 23:35

A-6 didnt blink at all..

Post by **Ozark Lee** » 27 Nov 2009, 23:49

2-3-1 and 2-3-2 are fuel trim limit codes. 1-2-1 is a MAF signal code.

Most of the time the 2-3-1 and 2-3-2 is due to a vacuum leak. The usual suspect is the vacuum line on the front end (belt side) of the intake manifold. It is a real bear to get to to fix. A bad or dirty MAF can also cause all of the codes that you describe and the behavior of the car that you describe. MAF cleaner is real cheap at the auto parts store, clean the MAF by just spraying it and then letting the cleaner dry. Don't try to scrub it and don't even touch it. It is very fragile and if it is damaged it is very expensive to replace.

Just cleaning the MAF may fix your problem but my guess is that you have a vacuum leak as well. Cleaning the MAF properly can never hurt anything.

Since you have a Turbo no codes in A-6 is normal.

...Lee