Helpim In Themiddle Of The Road

[muff1n]

ok i was driving and the rpm dropped down to zero. i tried to start it again. the car starts and idle but the needle keeps jumping up and down. as soon as i give the car some gas the the car shakes and the rpm drops down too zero and the car dies. i think its the coil packs but im not sure. there are no lights like cel. only a battery light when the car dies. plz help me out. thx

[Seerlah]

What year is your car and mods? This same thing happened to me couple weeks ago.

[Jibberific]

maf?

[muff1n]

the car is a 01 a4 1.8tqm no engine mods just coilovers and sway bar.

[Jibberific]

are you still in the middle of the road?

it sounds like some really bad misfiring but that is supposed to cause a blinking cel

[Seerlah]

Unplug the MAF and see if it runs. It is under the rubber groument on the stock air box. Disconnect the plug from the MAF.

[muff1n]

Yeah thats the thing there is no cel. I got it parking next to a no parking sign.

[Seerlah]

Unplug the MAF. A bad MAF does not give you a CEL. Not at first then you will get a CEL for other things. Such as running lean.

[AudiA4_20T]

sounds like you blew a boost hose off or your IC endtank cracked

[muff1n]

sounds like you blew a boost hose off or your IC endtank cracked

ok im going too look but the car starts and idle alittle rough but works as soon as i put in gear and start drving it dies.

[Seerlah]

^That is what happened to me. My advice would have been for him to unplug the MAF so he could drive it home. Then put it on jacks or a ramp and check the hoses. Actually, the piston on my Forge DV got stuck and the pressure blew the hose off. I just serviced my DV and good as new.

[djwimbo]

I blew off my throttle body hose and it did just that. Apparently one of my Forge DV's was sent without sufficient lube and the piston stuck open on it and it felt kinda similar. It wouldn't stall out though.

[muff1n]

Seerlah thx for the help i unpluged the MAF and got home. Can i run without a MAF why do i need it. what i noticed driving home was that that the turbo spooled but i could hear the DV. i didnt hear the pppttttshhhhh sound. Is that another clue that the DV is broken or needs cleaning.

[biketsai]

Seerlah thx for the help i unpluged the MAF and got home. Can i run without a MAF why do i need it. what i noticed driving home was that that the turbo spooled but i could hear the DV. i didnt hear the pppttttshhhhh sound. Is that another clue that the DV is broken or needs cleaning.

The reason why you can run w/o the MAF is because on the 00-01 the engines also had an additional MAP sensor which gets the reading too. Check your hoses.

[muff1n]

i will but i really dont thing a house could blow off a a stock KO3 turbo with now chip or any other mods. Am i wrong to thing that? but yes will still check the hoses.

[muff1n]

Plus if the hose blow off i wouldnt be able to drive cuz i could hold the boost right. cuz it could all could out. right. is it just time for a new MAF.

[biketsai]

Hmm, are you running the stock DV? if so, then that is the first thing you should replace.

[muff1n]

but u dont thing it could be the MAF some answer me that. Why or why not? cuz when its unpluged the car was fine. if it was the DV would it still give problems even with the MAF unplugged.

[biketsai]

but u dont thing it could be the MAF some answer me that. Why or why not?

Not so sure I can give a full explanation, I dont think the MAF will cause that. But unplugging the MAF helps determine where hte problem is.

[Seerlah]

I am no expert (maybe someone could explain it better), but the fueling the ECU grants is done by calculating measurements from the MAF and 02 sensors. On the 01 (I did not know thw 00 also), there is an extra Map sensor that the ECU could get readings from for your ECU. The problem is it is not getting proper readings. Which will lead to next issue.

You will eventually get a CEL for engine running lean if you do not diagniose the problem. You will also need to fix whatever iis the problem and plug the MAF back up. To determine whether your MAF is bad or not is to log it with a Vag Com. As I stated before, you will not get a code for a bad MAF. Only running rich or lean which leads to a bad MAF being one of the culprits.

You would need to check all the hoses and dv as everyone stated. Then after that you confirm that all of them secure we can diagnose if you have a bad MAF, but you will need a VAG com for this (but if your car runs properly after you check all hoses and dv with the MAF plugged in, the MAF is more than likely still good). You need to get under your car and check the dv. If it is torn or ripped, it can be equivalent to a loose hose. Get a 710n, place hoses back, plug MAF back in and see how the car runs. Then post back after you do that.

Do not drive with your car the way it is. I just gave you that advice to get your car home so you can fix it the proper way. Which in all actuality should not cost more than $50 to fix. If you end up needing a new MAF, I have a used extra one I could sell you for $50 (hence, why I said no more than a $50 fix. Hoses are cheap, clamps are cheap, 710n used is cheap. but not cheap when you are broke).