Last post on Jun 11, 2013 at 1:53 PM
You are in the Volkswagen Jetta
What is this discussion about?
Volkswagen Jetta, Engine, Sedan
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#271 of 304 Re: Rough idle, Muffled Exhaust, even w/ new plugs, wires, and ignition coi [jeffyscott]
Dec 03, 2009 (6:05 pm)
The 2.5L engine uses COP (Coil On Plug) ignition units. Apparently, these COP units have been troublesome for VW.
There is a reason that COP units are considerd high-tech.... each indivudual ignition-unit is plugged DIRECTLY into the top of the sparkplug. This means the COP unit must endure extremely high heat from the cylinder head. Heat and electronics do not mix well. (The heat always wins in the end)
#273 of 304 Re: Look here for recalls/TSBs [bpeebles]
by MrShift@Edmunds HOST
Dec 03, 2009 (6:28 pm)
If you have the # and date of the TSB I'll post the details for him.
#274 of 304 Re: Rough idle, Muffled Exhaust, even w/ new plugs, wires, and ignition coil [bpeebles]
Dec 07, 2009 (10:32 am)
Here are the specific codes
PO351, PO352,PO353,PO354 -I believe corresponds to each of the connections to igintion coil, slots A-D.
Presently slot A has plug 1, B -2, C-3, D-4
All wires and plugs are new
The last code is PO302 which is misfire cylinder 2
I know I do not have the green ECT so will grab one. The needle sits at 0 for as long as I can recall. Years. Was told that is just how they are. I will also unhook the MAF as well
#275 of 304 2000 Jetta VR6 (Timing Belt)
Mar 10, 2010 (8:08 pm)
I own a 2000 Jetta VR6. I bought it at an auction and it didn't come with an owner's manual. The vehicle has 149,000 miles on it. I've been hearing that they don't have a timing belt on them but wasn't sure if that was true or not. Someone said that I should replace the belt. Does the car even have one though?
#276 of 304 Re: 2000 Jetta VR6 (Timing Belt) [daltonb40]
by MrShift@Edmunds HOST
Mar 11, 2010 (8:06 am)
No it has a chain, but these have been known to wear out (especially the guides and tensioners) on these cars. No need to replace it preemptively, but if you start hearing timing chain noise, get to it right away. Big job, not easy. At your mileage I would check for timing chain noise when the engine first starts in the morning. If you aren't sure what chain noise is, have a technician listen for you---if the guides break, you've got yourself a big mess.
#277 of 304 Re: Rough idle, Muffled Exhaust, even w/ new plugs, wires, and ignition coil [dp2226]
Mar 11, 2010 (7:11 pm)
If you are seeing ALL those codes (P0351, P0352,P0353,P0354 )... and have new plugs and wires... all that is left is the coilpack itself. (or bad ground-connection to the coilpack) This is not an inexpensive part. I would personally consider a good used one from scrapyard if I could find one.
BTW: I just installed a new (green) ECT (Engine Coolant Temparature) sensor in my wifes Jetta yesterday. Then I hooked up my laptop computer and reset all the codes. So far, the light on the dashboard has NOT come back on and the temparture guage has been working as expected.
#278 of 304 Re: Whats that noise??? [calivdub]
Jul 06, 2011 (9:24 am)
I have a 2011 2.0 VW Jetta, 16400 miles. Just had the axles replaced because the cv boots had slight tears. From the very first driver after they were replaced, I have loud noise when it reaches 38 RMP. I can not take it to 75-80 because the noise gets louder and you can feel it. My mechanic is confused. He then replaced the Rear Tranny mount (dog bone) because he noticed it did have more play in it then should have thinking this was the problem. He is now playing the guessing game. He even thought maybe the wheel bearing but it doesn't make the noise constantly. I do not have any $$$ to take it to the dealership. Help!!!
#279 of 304 Re: Whats that noise??? [suz18]
Jul 06, 2011 (1:19 pm)
The rubbers on the CV joints were torn at 16K miles.... OWCHIE... The only time I have EVER had such a problem is when porcupines were nibbling on them to get at the road-salt from the winter. Most vehicles will go well over 100,000 miles before CV joints need any attention.
Some of the cheap rebuilt "aftermarket" parts will not perform nor last nearly as long as real VW components.
If you are CERTAIN that the new axles were properly installed and are original GERMAN components... then I am sorry to tell you that what you describe may be INSIDE the transmission.
#280 of 304 Re: Whats that noise??? [suz18]
Jul 07, 2011 (10:56 am)
calivdub: If that noise was not there before the CV replacement, it sure sounds like the repair was not done correctly, or the replacements were defective. Has your tech gone back to make sure all bolts and fittings were properly tightened? Also, some vdubs have different axle lengths for each side, but I wouldn't think they could be mixed up. vwdawg