Need help determining whats wrong

Asked by Sep 26, 2017 at 02:52 PM about the 2003 Volkswagen Jetta GL 2.0

Question type: Maintenance & Repair

My car is a 03 Jetta got it about a year ago. I believe it was left mostly sitting
in one spot for long period(s) of time. The roof clear coat shipping off ever so
little.
Managed to fix most of what was wrong with it. But now I'm experiencing
something weird with the engine. I know that the thing doesn't have to much
HP and/or torque. So I plan accordingly when it comes to gassing it. But
sometimes I have no choice. When I gas it too "hard" the engine kicks a bit.
and it blinks the check engine light. I know i have something wrong with a
vacuum tube. But I'm not sure if that's the cause of it.

13 Answers

2,790

Blinking check engine light is not good. It means you are in danger of ruining your catalytic converter. I would definitely fix your vacuum issue as this can cause your issue. A few dollars worth of vacuum line is not worth $1500.00 catalytic converter. You have too much unburned fuel getting to your converter.

1 of 1 people found this helpful.
Best Answer Mark helpful

Oh dam. That doesn't sound too good. Also forgot to mention when the car is in idle, not moving just in park. The RPM needle keep jumping up and down. Not by a whole lot but its noticeable. And I'm not 100% about the vacuum itself. I just asked a friend and he said that what it was. Every time I try to actively try to find a replacement I can never find it. I eventually just pulled one off a '02-'04 Jetta in the junkyard. Once i get out of school i can take pictures of the tube I'm referring too.

2,790

All parts stores carry this vacuum line. Use hose clamps or constant pressure clamps. Take a picture if it has special ends or something of that nature. Do you have a check engine light constantly on? Read the code and start there. Some code readers can check for historical codes if the light is not on at the time of checking. Does sound vacuum related. Your computer is throwing extra gas in the engine to overcompensate for all the unmetered air

1 of 1 people found this helpful.

Ok in this pic I'm showing the "hose" or "tube" that I had/have problems with. And yes, when i turn the car on it usually makes a noticeable "sucking" sound. The sound was significantly louder before I replaced it with another used one. And yea I'm gonna try to ask around to find a code reader. The engine light as of now is constantly on, sometimes in a really cold night/morning the check engine light doesn't come on. And then from there, it only comes back on when I gas it too hard.

2,790

This makes sense that a cold engine needs more gas. The light is not on when cold because it is already getting too much gas because of the issue and being cold it needs more gas. Code readers are really cheap on EBay. Get the MS300 from Autel. $10 - $13. Great reviews. I have 3 of them one in each car. For now autozone might be able to read code or pull a historical code for you?

1 of 1 people found this helpful.
2,790

NAPA or any parts store would sell you that piece for like $4. Buy new clamps. Keep in mind that fixing one vacuum leak might uncover another because of the age of the rubber hoses. I buy 4 feet at a time of all different diameters for this reason.

1 of 1 people found this helpful.

Yea definitely. Now, is this issue time sensitive? Because I've been driving with this issue for a while, and on 300 mile trip. Not recently but a while ago. Currently I'm waiting for the miles to come up to 3k. So I can do an oil change. Was wondering if I can hold off on it till then or fix the issue before then. Thanks so much for your help.

2,790

I am guessing you will get a code that says large vacuum leak. I would not drive this vehicle if it was mine. Ruining a catalytic converter is expensive and sometimes aftermarket parts do not fix the issue and OEM are crazy expensive. I would be outside replacing vacuum lines if it was my car. You also could have a gasket leaking on your intake that would show up with a smoke test. There is a video on YouTube on how to make a smoke machine for cars. You could do this and find your other leaks. How does the evap canister and the hoses going to it look?

1 of 1 people found this helpful.
2,790

You also could have a bad gas cap. (Seal on it)

1 of 1 people found this helpful.

****UPDATE**** Ok first off I would like to thank you a lot for your help, and also sorry for not responding after your last. About 3 days ago I went to O'Reillys to get my check engine light checked. Two codes came back; P0302 Cylinder 2 misfire and 532 Battery voltage to small. So after o got that information I did quite a bit of research. Deduced that code P0302 was coming from a bad spark plug wire or the spark plug itself. From my research I believed that code 532 was in relation to P0302. Therefore, I maintained my focus of P0302. I bought new spark plug wires and spark plugs. Just today I tried to do it and sort of succeeded, I was unable to remove spark plugs 1 and 4. I feared I would crack the manifold. But i managed to change spark plugs 2 and 3. I did however, change all 4 spark plug wires. I accidentally broke the vacuum tube that is on the left of the manifold, but managed to get a replacement for that. I also replaced the gas cap. The seal was riddled with tears. Overall, once said and done. The car is working just fine now. Tried to replicate the situations in which the issue would normally be caused, but alas! Issue gone. Oh by the way, I think i found the main culprit here. Just take a look at the picture...

2,790

Wow yeah I think that would do it. I once had a spark plug that the resistor was even with the ceramic. Good job on the fix try those other spark plugs when the car has been in about 3 minutes. Maybe even drop a small bit of oil down and work them back and forth.

2,790

Car has been on about 3 minutes

Yea honestly If i had the whole day I would of worked something out but I had work. I was crunching time at that point. Probably find another day to replace the other one. But yea, as of now no check engine light is on and the engine purrs nicely. Well ass nicely for a 13 year old car.

Your Answer

Jetta

Looking for a Used Jetta in your area?

CarGurus has 1,986 nationwide Jetta listings starting at $1,800.

Postal Code:

Volkswagen Jetta Experts

  • #1
    Goodwrench707
    Reputation
    2,460
  • #2
    Deathjam4
    Reputation
    1,940
  • #3
    Scott Sr.
    Reputation
    1,470
View All

Related Models For Sale

Used Volkswagen Passat
29 Great Deals out of 596 listings starting at $1,950
Used Honda Civic
301 Great Deals out of 3,173 listings starting at $995
Used Volkswagen GTI
29 Great Deals out of 192 listings starting at $3,995
Used Honda Accord
81 Great Deals out of 951 listings starting at $1,815
Used Volkswagen Golf
52 Great Deals out of 884 listings starting at $2,495
Used BMW 3 Series
147 Great Deals out of 1,733 listings starting at $2,990
Used Toyota Camry
86 Great Deals out of 2,208 listings starting at $1,781
Used Toyota Corolla
266 Great Deals out of 3,938 listings starting at $995
Used Audi A4
31 Great Deals out of 556 listings starting at $3,995
Used Nissan Altima
80 Great Deals out of 1,382 listings starting at $1,785
Used Mazda MAZDA3
173 Great Deals out of 2,768 listings starting at $995
Used Ford Focus
87 Great Deals out of 2,606 listings starting at $999
Used Volkswagen Beetle
26 Great Deals out of 284 listings starting at $1,295

Used Cars For Sale

2017 Volkswagen Jetta For Sale
609 listings starting at $16,907
2016 Volkswagen Jetta For Sale
5 Great Deals out of 153 listings starting at $13,899
2015 Volkswagen Jetta For Sale
26 Great Deals out of 247 listings starting at $10,950
2014 Volkswagen Jetta For Sale
18 Great Deals out of 209 listings starting at $7,990
2013 Volkswagen Jetta For Sale
17 Great Deals out of 385 listings starting at $5,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.