MAF Question

[Frankenstien93]

I was wondering if what was going on. I have recently had problems with the car at idle it would die all the time. i ended up blowing the oil seals on my turbo so i for some reason took off the intake piping going into the turbo to watch to see if my turbine bearings were shot. but once i took the piping with the MAF on it off it ran fine for a long time. but once the piping even touched the turbo the car died. i dont know if the MAF has to be a certain distance away from the turbo (its about 7-8 inches away now) or if its bad and needs to be replaced. any help would be greatly appreciated.

[Frankenstien93]

anyone

[corn322]

So your car ran better without the MAF in the system?

[Frankenstien93]

i didnt unplug the wires i just unhooked it from the intake and it idled fine but once i went to put it back on the intake it died right away

[corn322]

Very strange. I don't have any ideas.

[Chezedik]

Does the turbo spin? Do you get any check engine lights? Can I assume your maf is being pulled through?

[Frankenstien93]

yea the turbo spin really sloppy though the bearings were shot. yea its a pull through system but the maf was just sitting off to the side still hooked up to the car but not the intake and it idled fine but would not rev past 2500rpms

[Chezedik]

But it will drive okay when you disconnect the MAF from the plumbing? Does the turbo push any air through to the other side?

[Frankenstien93]

i didnt drive it because it wouldnt rev past 2500rpms and i really didnt want to drivew w/o air filter on it i was just wondering if you have to have the maf a certain distance away and thats why my car has been dying at an idle then it "fixed" the problem when i removed it. so i would just make the intake from MAF to turbo longer and that would fix the problem

[Frankenstien93]

i just was wondering how far normally everyone runs the maf from the turbo or even if there has to be a certain distance

[dontbugme]

I was wondering if what was going on. I have recently had problems with the car at idle it would die all the time. i ended up blowing the oil seals on my turbo so i for some reason took off the intake piping going into the turbo to watch to see if my turbine bearings were shot. but once i took the piping with the MAF on it off it ran fine for a long time. but once the piping even touched the turbo the car died. i dont know if the MAF has to be a certain distance away from the turbo (its about 7-8 inches away now) or if its bad and needs to be replaced. any help would be greatly appreciated.

Could we have a few more details or some history? 1) Was the car operatring normally and this just happened or did it always die at idle? 2) Did it use to start and run but only die after coming out of boost like when coming to a stop sign? 3) What's your ECU set up? 4) Is your turbo dead or alive? 5) Did you check all your high pressure hoses for leaks? 6) Any CEL's showing, if so what are the codes? Most cars will run with the MAF disconnected electrically or removed - though not well. Distance to the compressor intake such as yours is shouldn't be a factor. W/O the MAF the engine would obviousely be lean, hence no running at elevated rpms. ECU tuned to very rich will also kill the engine with the MAF connected. I'd try a different MAF as a first step if items 4 & 5 are o.k.

[Chezedik]

Nissan computers are set to run without a MAF or with a malfunctioning MAF in what is called limp home mode. The car will only run until about 2.5K RPM in this mode if a MAF malfunction is to blame. Have you checked to see if the MAF is even still good? Distance can be important as it tends to lean out when it takes on greater ambient heat, but I am told the limit is 6-8in. Many NA guys do this all the time when making a custom intake.

[Frankenstien93]

well ever since i put the turbo in it would not idle for more than 5 seconds at a time and my turbo did konk out on me so i removed it and just capped off the exhaust housing and it still does it. i dont have a A/F controller and i am runnning on stock injectors now while its N/A and it still does it. how do i check to see if my maf is bad and what would cause somthing like that to go bad???

[Chezedik]

Sometimes they just go bad, if you go to the NA section you will notice a sticky on the top that includes a Factory Service Manual. That will tell you how to test the MAF.