My gf has an 03 Jetta. The whole thing is pretty much factory but she wanted to put an intake on so she went the ebay route and got a cold air intake from OBX or whatever. Anyways to make a long story short it threw the EPC and Check Engine light on so she went to Lokey VW and they said it read 3 codes and it was Throttle Body Assembly, MAF sensor, and Crankshaft Sensor. Could this have happened because the computer isnt used to the new increase in airflow reading on the MAF sensor? Im really confused. If anyone could chime in and point me in the right direction I would greatly appreciate it. Oh and I already did a search and could not find much. Thanks!

 

It shouldn't have, the MAF code maybe if you decided to touch the sensor. Does it drive fine? What motor is it anyway?

 

I dont know the name of the motor but its the 2.0 I4. I think its a GLS if im not mistaken. I personally did not install the intake. These 2 boneheads at a local tire shop installed it so they might have ruined the MAF sensor. It has a hard time starting after it hasn't been driven for over 30 minutes. Other than that it seems to run well and under hard acceleration the engine sounds a tad bit louder because of the intake i suppose. The only other odd thing is once it finally starts and goes to idle, I cannot turn the AC on because it will stall out. I first have to drive for just a few seconds then turn it on. I guess that is because the load the AC comp does to the engine drags the power when its trying to sustain itself. Correct me if im wrong. It takes many attempts to start it up. One time it refused to start so i removed one of the couplings on the intake and covered the hole with my hand then had my gf start the car and it started right up no problems. I guess thats because its getting too much air on start up. Could a bypass-valve correct this? Also im priming the fuel pump to aid in starting but I dont want to flood the engine so should I avoid doing that?

 

Sounds like the "mechanic" at the tire shop (really who does that?) screwed something up. I would take it to uro tuning and let them scan it, they should be able to point you in the right direction with what parts you're gonna need. How are you priming the fuel system? You can't flood it unless you have an injector sticking open. First thing I would look for is any loose wires/connections in the area they should have been working in. Look for any signs of someone trying to cover up a screw up.

 

Yeah tell me about it. This idiot advertises that he does "complete auto repairs" but all he has is a mount and balance machine and a tire machine and 2 lifts. He has destroyed simple things in a lot of my neighbor cars ranging from e-brake assemblies to spark plug wiring. But thats here nor there just stay away from "Adams Tires" in Odessa FL. Ive just been turning the key in the ACC position and back 3 times for the fuel pump to prime. I do it in my Honda when I have no gas and the car doesn't wanna start the first few times lol. I didnt even think about the fact that that doesnt do anything because fuel injectors dont operate in that manner so your right I cant really "flood" the engine. So first I will start by looking around for things that are disconnected. The guy mentioned to my gf when she got the car back that it was difficult for him to install the intake because he had to remove the headlight assembly. And her high beams dont work either now. There is also a pipe that runs off the intake to some sort of collector that sits under the valve cover panel in the front of the engine bay. Well he duck taped that stock pipe thing to the new intake and spray painted it black to blend it in i guess. I saw that crap and I peeled it off and put some rubber IC piping from an old DSM I used to have. Ive also had to re-tighten all the hose clamps every so often. So where is this euro place? And if the codes read those sensors is it saying it needs to be replaced or are they getting an incorrect reading? Im so confused. This is the first time im touching a VW.

 

uro tuning is on faulkenburg just north of 60 next to I75. Website is urotuning.com Probably have a serious vacuum leak, thats why you're able to start it easy with the intake blocked. The sensors giving the codes might be getting false readings from the botched job. If you don't have a manual yet, go grab a haynes. Eventually you'll need a bently but only if she keeps it and doesn't want to take it to a real mechanic. I would start taking pics of everything you're not sure of and post them up. Somebody will have something similar and should be able to guide you. I have a 2.0 in the race bug, and i still have the stock intake so i might be able to compare the two.

 

Well i didn't find anything unplugged but tomorrow morning I will look for vacuum leaks. That never even occurred to me lol. I will take some pics of the hack job and post it. Yeah your right im sure im not the only one who has an intake on a VW Jetta so someone out there has to have some idea about what is going on. Oh and today while I was looking around the engine bay, I discovered the idiot broke the oil dip stick tube. It is yellow and made out of plastic but none the less its broken now and it was not broken before. And an oil change is due soon. I wonder how much that costs at VW. Ohh boy -_-

 

the dip stick is common to break. urotuning has it in stock, at least they did 2 days ago when i was in there.

 

do you remember how much it was?

 

Boom theres your problem right there