FIXED!!!!!-Smog failed due to EML light, did a drive cycle, now car is messing up!

[diddy0071]

Finished the spark plugs (some of the boots and coils were a butch to remove. Got to dark to see. On to tomorrow where I put the ICV and air box and turn it on. I'll keep you posted.

[diddy0071]

Started about an hour ago putting all the vacuums and boots and DISA/ICV valves in. Started up to the same thing. hesitation. I sprayed carb cleaner on the vacuums and found that there is no vacuum leaks. I put my hand in the air channel to block it, and it adjusted the idle accordingly. disconnecting the MAF made it idle better, but if I stepped on the pedal for fuel, it would hestitate. same issue as the video. So to recap:

DISA-Replaced
Spark Plugs-Replaced
Rubber Boot-Replaced
ICV-Cleaned
MAF-Replaced

I'm starting to think that vacuum wise, I am checking out. It might now be either a fuel issue or a spark issue. Since it turned on great (and feels like I got more power with the new sparks) and it idles ok, no hesitation on idle (only on cold start) I think the injectors are plugged (I hope not!) or the pump/fuel filter needs replacement. So I'm leaning on fuel too. I saw a video (BMW Fuel Pump Fuel Pressure Testing - YouTube) on how to check the fuel pressure through the shrader valve, and will most likely do that next. I'll post results once I get fuel pressure.

Unless anyone else has something to add?

[diddy0071]

Looking for pressure regulators on my vehicle, do they come included with a fuel filter?

[bcredliner]

When you disconnect the MAF and it idles fine that is an indication of a bad MAF. Testing by by stepping on the gas or driving it with the MAF disconnected or stepping on the pedal does not mean it is something else. Suggest you clean the old one with MAF cleaner and see if the hesitation goes away. If you clean the MAF again be sure to spray the wires encased at the end furthest into the air inlet, those are the important ones.

I know that brake cleaner works to find a vacuum leak not sure if carb cleaner would work as well. Suggest you use brake cleaner if you are going to do it again.

Do you use brand name fuel? Techron will do a good job of cleaning the injectors but you have to add it to a full tank of fuel.

[TerminatorX5]

Originally Posted by diddy0071

Looking for pressure regulators on my vehicle, do they come included with a fuel filter?

i believe they do... Anyone knows otherwise???

01Fuel filter with pressure regulator104/2002"13321709535"$96.84


chinese aftermarket

Fuel Filter for BMW 5 Series 97 2003 98 99 13321709535 | eBay

here is an original BMW part from BMW of Minnetonka - i personally bought a fuel filter for my V8 from them, super fast shipping, original part, no questions about fitment - this is what the doctor ordered

BMW 13321709535 Genuine Factory Original Fuel Filter | eBay

[diddy0071]

I checked the codes:

P1342
P1350
P1346
P1352
P1348
P1083
P0174
P0171
P0102

Looks like it gave me a check engine for the spark plugs being changed. Cleared the codes out, came back with P0171, P0174. Kept clearing them out, and they kept popping back up.

I turned it on and closed my eyes and listened for any noise as I revved the engine. I noticed that I hear a faint whistling/sucking sound. Unfortunately, I am alone, and I can't be in front of the engine and giving it gas at the same time. That DEFINITELy sounds like a vacuum leak. Does anyone have a diagram of ALL vacuums and where they lead to? Also, I took off the fuel cap while the engine was off, and it died. Replaced the cap, turned it back on and removed it again, and it stayed on. Not sure what to think of that.

I'm about ready to throw my car away in frustration. Something just doesn't seem right! I'm going to replace the old MAF sensor in it and see what THAT does.

Thanks.

[bcredliner]

try a piece of wood wedged between the seat and the gas pedal so you get just enough RPMs to hone in on the sound you are hearing--spray the carb cleaner there.

[TerminatorX5]

Originally Posted by diddy0071

I'm about ready to throw my car away in frustration. Something just doesn't seem right! I'm going to replace the old MAF sensor in it and see what THAT does.

Thanks.

stay with us - you will get it done...

we are trying to get the best diagnosys before throwing parts in to the problem... changing plugs - seems that you could use new plugs anyways...

before going into the fuel filter or pump, lets make sure that sound you hear is not a vacuum leak...

[bcredliner]

Originally Posted by TerminatorX5

stay with us - you will get it done...

we are trying to get the best diagnosys before throwing parts in to the problem... changing plugs - seems that you could use new plugs anyways...

before going into the fuel filter or pump, lets make sure that sound you hear is not a vacuum leak...

You don't have to change the whole MAF just remove the sensor from the tube.

If it is easier for you, you can also pressurize the engine with smoke and it will come out anywhere there is a vacuum leak

[diddy0071]

So I plugged in the OLD MAF, still the same issue. I decided to check the DISA valve. IT doesn't seem to be working with it plugged in or not.

http://i.imgur.com/06fAvic.jpg

http://i.imgur.com/cGVvtRQ.jpg

http://i.imgur.com/CqsxJVp.jpg

The DISA valve unplugged, doesn't do anything different. The DISA valve plugged in, same thing. I noticed the little cap to the plug for the DISA had a zip tie on it. I popped it off, and removed the cap. Maybe the connection just isn't working anymore.

Suggestions? FML.