B6 a4 1.8t won't start, really need some help.

[B6_A4_Kid]

Alright guys I'm a new kid around here, I just got my own a4 it's an 04 Quattro with 131k on it. I have had it for a week. My car did not pass emissions and threw the code for a bad Evap purge valve. I received my new one today, a Bosch from ECS, I also decided to slap in some new plugs. I get all my new parts installed in 10 minutes, fire it up and went to grab lunch. Came home parked her in the garage and shut it off. About 7 hours later I was going to go catch a movie with some buddies, went to start it up, nothing. It will crank forever, I can hear the fuel pump, and it's getting fuel because the plugs are wet. I put a plug in a cool pack and positioned it on the valve cover and cranked it, no spark. Them I put the old plugs back in, same deal, nothing. I am kinda thinking it might be the speed sensor, but not sure. I can take a video of it trying to crank once the battery is charged again.

[EuroxS4]

Hmm weird check for faults.Was the timing belt even done on the car?It could be a speed sensor but even with a bad crank sensor it should still pickup the cam sensor and know when to fire the plugs and injectors.No fuel leaks??My instinct tells me bad fuel pump but you would need to check for fuel flow before rail while cranking the car.

[B6_A4_Kid]

The car fax showed an Audi 100k maintenance, I figured that was the timing belt

[B6_A4_Kid]

I ordered a cheap vag com cable and it won't be here until Tuesday. The car had its 100k maintenance done by Audi, not sure if that means timing chain or not. Still not sure if it's the fuel pump because I can here it, and the plugs are wet. Not a single leak is coming from anywhere on the car. The only thing is my coil pack harness is pretty effed up, had spots with bare copper, taped it up as best I could but didn't make a difference. I took a video but I'm not sure how to post it up here

[B6_A4_Kid]

I believe I found the issue, I must have been looking right passed it. On the left side of the engine, there is a metal line that runs to the kombi valve, and at the front of the motor it has a 90 degree fitting to go down to I believe the SAI not sure. But that fitting is broken, not sure if that is the current problem. But it is an issue, another issue is I can't find that fitting anywhere. I'm thinking I'll have to go to the stealership

[chad99]

The SAI won't stop the car from starting, it will throw a code but won't prevent starting

If it was the crank sensor the car should be able to start at around 2 or 3 trys

It's easy to check if the timing belt is good by removing the upper timing cover (only clips hold it) and starting it, if the belt spins the cams it's good, plus you can inspect the belt for piece of mind.

[B6_A4_Kid]

what do I look for with the timing belt? It won't start

[chad99]

When the starter cranks it's spinning the crankshaft which spins the camshafts via the timing belt, if the timing belt was broken your cams will not be spinning while the motor is cranking

If your by yourself you can mark the camshaft sprocket, try to start the car for 1 sec or less then check to see if the mark moved

[B6_A4_Kid]

Sorry to be a noob, which sprocket is for the cam?

[B6_A4_Kid]

Timing checks out, I think my next step is to order a new coil pack harness and see if that fixes it. I am absolutely get zero spark and it only happened after I change my plugs, as I pulled the harness of I could hear the plastic inside cracking. Hopefully I can have one overnighted to me

[old guy]

Have you checked your engine management fuses? They are under the fuse panel on the left end of the dash. Open the door and you will see the panel .There are four engine management fuses. 29, 32, 34 and 43.

Your cracked coil pack harness may have shorted out and blown one of them.

[V70R]

Check the fuses. Had a very similar issue on an '02 1.8t, coil harness was the culprit. Fuse 29 I believe is the 12V+ for the coil packs, but check them all.

[EuroxS4]

I believe the harness for coils is part of the entire engine harness.Is the ground attached to the valve cover???should be a 10mm nut



Like others have said check fuses.Also which plugs did you put in the car and are they gapped correctly?

[B6_A4_Kid]

I have checked the fuses numerous times, and I pulled the ground on the valve cover and cleaned it. Trying not to fray the wire, I'm thinking about pulling all of the old brittle plastic and just wrapping in electrical tape to see if I need a new harness or not. Imo it has to be an issue with the coil wiring because it only happened after I changed the plugs

[B6_A4_Kid]

I put the same plugs my bro runs I his b6, bkr6e gapped to .30

[B6_A4_Kid]

I think in my tired swing that was yesterday, I was misreading fuse 29 for the one below that. I just went through this morning and pulled each one and sure enough 29 has been popped. That fuse is for the coils so I taped up all of the bare copper I could find, now I need to let my battery charge up and see if she'll fire. Fingers crossed

[customa4]

Like OG said, if the engine management fuses are popped then it's definitely being caused by the coil pack harness. Get that fixed ASAP.

[B6_A4_Kid]

Well i put a new fuse in and it's still a no start. I'm at a loss here

[Northern_B6]

Order up a new coil harness.

Are the coil packs themselves in good shape? What revision letter coil packs are in the car?? Post up a part #

[B6_A4_Kid]

Not sure which number you want off of them. Two are vmq 2 and one is vmq 5 and the last one is vmq 14. I have ordered a harness but I really need this car to get to work and school.

[B6_A4_Kid]

06A 905 115 D

3 of them are from 09 and one is from 10

[B6_A4_Kid]

I really need help guys, I have to get this car going with a temporary setup until my parts get here

[V70R]

If fuse 29 is popped, almost guarantee that it happened again while trying to start the car. You have a short in the positive feed to all your coils, you can try to find it by removing the boots at the coil pack connectors and insulation.

[B6_A4_Kid]

It was odd because the second go around the fuse didn't pop. Did I maybe screw up my coil packs?

[B6_A4_Kid]

I ordered new 4 pin adapters and they are supposed to be here by the end of the week

[walky_talky20]

Check for spark. It's easy. If you have spark, the harness is good enough to work for now and your problem is somewhere else.

[chad99]

If the fuses are still good and you fixed the coil harness enough to where you no longer have any shorts, for now at least.

Check for spark, if you have it, then maybe the engine is now flooded from all the start attempts?

[B6_A4_Kid]

Checked spark, still nothing. I'm getting pretty frustrated at this point

[old guy]

Your "D" coil packs are the latest revision. Once you get your cable in tomorrow you may find a code P0322. Clicky click®

[B6_A4_Kid]

I tried to download vcds lite, but it isn't working on my computer

[B6_A4_Kid]

I am thinking it is the speed sensor. But I am confused about it, I am going to replace it anyways because that's how I roll, but which is it for my b6 1.8t Quattro with auto trans. I am looking at speed sensors, but for some reason I think it might be the crank sensor. Not sure maybe someone can point me in the right directing. One actually has wire, and a plug. And one is a solid plastic piece with a plug

[walky_talky20]

So you checked for spark, and you have none? Don't stop there, you have to continue to trace the fault back to the source.

There are 4 wires to each coil pack connector: 12v+, Ground, Ground, and a 5v square wave trigger. Figure out which signal you are missing. Then continue up the circuit to find out why. I'd start with making sure the 12v+ is present with key ON.

Or just start throwing parts at it. That's always fun. <sarcasm>

[V70R]

Grab your DVOM and check the ground and power supply wires at the coilpack connector. See if there is any resistance on your main ground wire, and whether or not your coils are getting power to the 12V feed wire. By the way, turn the ignition to auxiliary when you are checking for power at coilpack connector. If you do not have any power at the 12V feed wire, re-check fuse 29. Let us know what you find...

[B6_A4_Kid]

So you checked for spark, and you have none? Don't stop there, you have to continue to trace the fault back to the source.

There are 4 wires to each coil pack connector: 12v+, Ground, Ground, and a 5v square wave trigger. Figure out which signal you are missing. Then continue up the circuit to find out why. I'd start with making sure the 12v+ is present with key ON.

Or just start throwing parts at it. That's always fun. <sarcasm>

Well thats exactly what I did, I went to Oreillys and bought a crank shaft sensor. I hooked it up with the DIY that old guy posted (thanks) and she fired right up. No CELs running better than ever