crazy studdering while Reving
 

My buddy just went to do a stupid tune up on the car. Replaced filters, changed oil, did some free mods.. everything was working fine. A couple days later, he decided to swap plugs and wires because he broke a wire doing a comp test and the plugs looked like they were the stock plugs.

It was running fine for about 10 minutes of driving. Shut it off, came back about 10 minutes later, and bam. At idle it sounds just like a beat.. you could here like a heart beat of exhaust. It was anything but a constant exhaust sound. Then we started moving and noticed it was studdering really bad. It is slower than an N/A dsm I'd think. I really dont know what happened.

He used the correct plugs ( bpr6es or some shit) and some cheap ass wires. Xact or something shitty along those lines. This car is completely stock ( 1g tsi AWD 7 bolt 92)

Any ideas anyone? Its friday, I probably wont get much help heh.

Re: crazy studdering while Reving
 

Sounds like a plug wire could be loose on either the plug or the coilpack.

Re: crazy studdering while Reving
 

Or some shit? There are a lot of plugs that are simular numbers but arent the same thing, if your not paying attention you could get the wrong ones. BP6S BR6ES BPR6ES. Make sure he has the right ones. Cheap wires could be the result. Make sure you have spark in each cylinder, if so then move to fuel. If no luck still check the intercooler piping, you said he replaced a filters? Was the air filter one of them, did he unplug the mas sensor and forget to plug it back in? Might try throwning the old wires back in, see if it helps.

Wow... 92 to have a 7 bolt. Not many of them were made. Interesting to know one is in the Metro area.

Re: crazy studdering while Reving
 

I would have to say a plug wire came off or is not connected all the way. Check the Mas plug also.

Re: crazy studdering while Reving
 

Bullshit, I would bet that either the plugs arent' gapped correctly or they are the wrong plugs. Brand new wires even if they are shitty should deliver enough spark on a stock car. What did he gap the plugs to?

Re: crazy studdering while Reving
 

If I remember correctly, the late 92's got the 7 bolts, didn't they? Mine was built in late 92 (93 model year) and had a 7 bolt in it.

Of course we can't forget about Mike's 93 with a 2g 7bolt in it........

Re: crazy studdering while Reving
 

I am going with Craig. I bet the plugs didn't get gapped and are sitting at .032" gap. If that isn't it, then one of the plug wires probably came off.

Re: crazy studdering while Reving
 

Very late, because 7 bolt production dates were 5/92 and up if I remember right. Usually any vehicle with a production date of June or later is the next model year. So there is a small percentage that were 92 model year with the seven bolt.

Re: crazy studdering while Reving
 

But would a .032" gap do that? Isn't that what they are supposed to be stock? Shit the guy that owned my car before me had his gapped at .035" so he said he could run 90 octane without any ill effects.... But I never had studdering problems with that gap, for the three months they were that way.

Re: crazy studdering while Reving
 

Yeah, I got to thinking about that and a big plug gap shouldn't matter at idle. A wire probably fell off. The plug gap matters more under boost.

Re: crazy studdering while Reving
 

Jake - I have the right plugs, I had it written down when I got there and I didnt have the sheet of paper here alright?

They are gapped to .30.. im aware that .28 is where it should be. Too bad that shouldnt effect anything until under boost! It does this ALL OVER the power band. Its not just at idle , or under boost. Its both.

The wires straight SUCKED. Im going to try and get better / new ones here today. I dont know alot about coil packs but its burnt black on the pack itself and the metal around it. MAybe it got cooked?

Im going to pickup the wires / coil pack right now and re-install to eliminate those.

I will update later once I get a better idea of whats going on.

Re: crazy studdering while Reving
 

wrong. .030. Yea .028 would be better, but I should have no ill effects at idle.

Re: crazy studdering while Reving
 

Actaully, .028 would not be better for a stock car, .031 would be ideal for the most power while at stock boost levels. You should learn to actually use proper grammar and appreicate other's ideas, especially when they know far more about DSM's than you can ever dream of knowing. You're lucky people are even helping you at all. I expect better from someone who's been on the boards for aslong as you have, good day.

Re: crazy studdering while Reving
 

You aren't seriously crying about my grammer are you? Everything I post is plenty legible for everyone to read. I have not had a complaint about that in a long time. I am not perfect, deal with it. And if you dont want to help, then dont. Usually the things people say on here dont help anyways. There is always that chance that someone chimes in with something that helps. When your working with something as broad as this ( lack of details for you) I can't expect anyone to actually help. I wish I understood what was happening more.

I dont exactly know where that attack came from but it was not needed. As for the brief responses that may come off as "snappy," I'm working on a DSM. Short temper is often the case while working on the car.

.030 is fine for the application. I was saving time just by telling craig that his assumptions were incorrect. I see nothing wrong with what I said.

Im going to swap coil packs and see if that helps at all.

Re: crazy studdering while Reving
 

I'm not going for the most power here. I'm trying to make the car STOP STUDDERING. How exactly do you know what I know about DSMs? You don't so dont assume. I've made everything work on every dsm I've owned with mostly verbal or NO help. I think I've paid people to work on my car a couple times and that was electrical.

Especially when everything posted was already things I know and have tried to change / test / fix. So far, nothing new has been established. This is a tech thread, why don't you treat it like one.

Re: crazy studdering while Reving
 

It needs to be 0.02901456 exactly.

This is one of the stupidest threads ever.

Re: crazy studdering while Reving
 

We have a winner..

Re: crazy studdering while Reving
 

I'm just trying to figure out this problem. That's all. It has managed to get off topic a few times already.

Re: crazy studdering while Reving
 

The time you have spent fucking typing shit in this thread you could have changed every part that could contribute to the car running like shit. We aren't going to be able to fix it for you, get your ass out there are work on it. And as far as my previous post, I didn't read your question carefully, I didn't know it was idling funny. My bad. Once you find out what was the cause of the problems feel free to post, otherwise no more of this bullshit.

Re: crazy studdering while Reving
 

Why not just use a DVM and check the coils? Wouldn't that be simpler?

Re: crazy studdering while Reving
 

Try a new coil pack, but first try a good set of wires- stock NGK or taylors or something that is good. Wires can make a big difference.

Everyone needs to settle down geez...

Re: crazy studdering while Reving
 

Electrical is anything but my thing. I dont have one nor would I know how to use one. Every coil is sparking, I just dont know if it is sparking right. I'm going to try and buy more new wires and plugs. The reasons these ones suck, is because the ends break off everytime you disconnect them from the coil pack and the spark plug. 2/4 are trashed.

Re: crazy studdering while Reving
 

Well I took craigs ass hole advise and it got me in the right direction ;) Thanks fucker!

The problem is still not fixed but I have a good feeling I know what it is. Since I put in NICE wires, NEW plugs gapped at .031, and checked out the coil pack; I realized sparks PERFECT. So what does that tell me? I air or fuel.. So I popped the clips off the injectors and pulled them one by one while the car was running. This is what I got

#4 - almost killed car
#3 - almost killed car
#2 - almost killed car
#1 - no change in how it ran

The car was already running weird and getting horrible gas mileage prior to this "tune up". So its likely that the injector was starting to get clogged and it finally had its own.

Problem is, I just sold my 450s and dont have anymore. I could use some good help if anyone feels like turning some advice over. Im up for any ideas.

Thanks in advance!

Re: crazy studdering while Reving
 

I'll check to see if I have a single 450 left. I won't break up a set if I just have sets left though.

Re: crazy studdering while Reving
 

Thanks anyways jet, Mike already got me covered. I am not putting it in tomorrow, I will post results like I was instructed.

Re: crazy studdering while Reving
 

I installed a couple injectors in #1. No improvement. Its still not firing. We put #2 clip on #1 and it was firing, but obviously out of order.

How can I fix the sensor / electrical problem? Can I just splice a new clip that attatches to the injector in there?

Re: crazy studdering while Reving
 

Yeah, be sure to solder it and shrink wrap it. You don't want to ghetto something up there where it is going to get wet a lot.

Re: crazy studdering while Reving
 

im talking about the clip which nothing but electrical current goes through.

I guess its a bit more complicated. I guess I have to use a DVOM and find where the signal is being lost and cut / solder there. I really dont know how to use that DVOM meter but I have one I can use.

ERIC FUCKING METZGER COULD BE SOME HELP HERE. Too bad he's horrible at answering the phone. EDIT ;) * notice the sarcasim now?

Re: crazy studdering while Reving
 

I wouldn't answer the damn phone either for someone who acts like you.

Re: crazy studdering while Reving
 

Are you kidding me? We treat eachother like this. Bah - So much for a tech thread. PPL just keep whoring it up.

Re: crazy studdering while Reving
 

LOL, if you are still having problems on Tuesday with this and haven't gotten a hold of Eric, I am pretty handy when It comes to electrical and can help. Let me know.

Re: crazy studdering while Reving
 

This is my car, just so you all know.

First were going to check and see if there is a short in the ecu. I'd much rather it be somthing like that than deep into the wiring harness, that's just a headache...

That is the next option that we are going to try out. I belive i have a DVM somwhere in the garage..

As far as the baggering goes, theres no point

Re: crazy studdering while Reving
 

Matt ( alpine TSI) went through the trouble to come down and figure out the problem. I'm glad he did because it was quite a bit beyond my electrical knowledge. If he feels the need to chime in and add detail, you can get more specs but until then, this is what I can tell you.

Basically one of the 2 wires going into the injector clip located on the top of injector number 1, was shorted somewhere. He ran a line to another source of signal or power ( cant remember with already lol) and now it works.

Bad thing - Check engine light pops on while at idle, and while no gas is applied. My guess is that the ecu thinks the injector isnt getting a signal but im not sure. It runs fine.

It wasnt very EASY to figure out, as he had to test a lot of crap with minimal tooling. However he did a great job and if for some reason he wanted to and someone needed help with electrical, I'd recommend him.

Re: crazy studdering while Reving
 

Thanks, now get that ECU taken care of! Unless you enjoy the smell of dead fish ;)

Re: crazy studdering while Reving
 

BUMP -

Would kind of like to know why the engine light comes on while at idle.. I dont have a scanner to check the code. I think its the way we wired it..

Re: crazy studdering while Reving
 

Bump, it's my car ~ I'd like to know aswell.

Re: crazy studdering while Reving
 

Well get one and find out. Thats the only way to check. Cant tell whats wrong with your car by looking at it, go to autozone or find someone that has a pocketlogger and pull the code.

Re: crazy studdering while Reving
 

Get the caps done, then worry about the CEL. Seriously, that damage to the board can't be doing any good.

If needed I have a logger and a cable that is now functioning correctly if you wanted to get the code figured out.

Matt