Bogging down like nuts after pro timing chain job =(

[Yorb]

Okay well I just got my 240 back from the shop, new timing chain and all. On the drive back, it was doing more than the usual stall at every light. It was bogging something AWFUL on low end acceleration.

I had told the mechanic beforehand that it was idling terribly, and asked him what he thought it was. He said he thought it was the MAFS gone bad, and that the AIV probably killed the MAFS because the AIV was screwed up. So, that would explain why it ran fine for a month after AIV removal, and then started with the stalling crap again. Anyway, on my way back here to work, like I said, it was bogging like mad.

So do I call the mechanic back and tell him to fix this, or do I just assume that this is the next step in the MAFS dying, and just go ahead and get a new one (junkyard)?

Also, where IS the MAFS? =/

EDIT: It just occured to me that maybe the car just needs to run for a while before it smooths out after such a big operation. Am I a dumbass? Is this all it is? =/

[nissandrift]

The MAFS is located next to where you replace your airfilter, its the metal tube. You can try and clean with brake cleaner, just make sure you are careful its very fragile. Usually though if its the MAFS the car is put into safe mode on your ECU and throwing a code 12. If it turns out to be the MAFS i have an extra one for sale.

[Yorb]

thanks.... i have no way of knowing if it IS the mafs, but my mechanic seems convinced that it is. what are you selling yours for? i found one at a raleigh junkyard for $85 with a 30-day warranty.

oh, and i opened up the air filter and peered around into the mafs (without removing it) and it looks to be the cleanest thing on my damn car. bright and shiny all over the inside, not a speck of dirt.

[bokinsmowls]

your not gonna see any dirt on the inside wall of the MAF. Just take it out and look at the sensor to see if there is any build up. I just did my timing kit last week. Been playing with the electronic timing, because my was doing same thing. It was way retarded where it sat before the timing job.(I marked the housing and cover before hand) You say you had it professionally done, but I would have electronic timing checked. Supposed to be 20 +/- 2.

At the risk of giving advice AND asking, what is the AIV, and why remove it?

[Yorb]

ahh. well that explains why there was no dirt there. i suppose that means my air filter works. good to know.

i wish i could have done my timing business myself, god knows that $1075 bill was not a pretty sight. i have no covered place to park my car, not even a concrete pad... not to mention any sort of jacks or lifts. didnt really have a choice =(

there's an article in the articles section of NICO about the AIV. basically its an extraneous part of the intake system and it causes problems, including screwing up the MAFS. i'm not sure exactly what the upsides of keeping it are. i think it helps to get more air faster to warm up the car when its cold out or something.

[nissandrift]

Im right by Raleigh, Ill sell it for 50.

[nissandrift]

If you want to try it first thats fine also.

[Yorb]

sounds like a good deal! where are you? i can come friday... or saturday or sunday i guess. we can also just pick somewhere to meet. i havent tried getting the MAFS off but i doubt it takes more than a screwdriver. we can do it in a parking lot.

[D-UNIT]

i wish i could have done my timing business myself, god knows that $1075 bill was not a pretty sight. i have no covered place to park my car, not even a concrete pad... not to mention any sort of jacks or lifts. didnt really have a choice =(

I would not wish that on anyone. I did mine about 8 months ago. My two friends (one a toyota and chevy master tech. the other a chevy tech.) and I just started yanking parts off. " should be easy " we said. HA '' hardly ''!! To take off the timing cover , you have to drop the oil pan. To take off the oil pan , you have to drop the crossmember. To take off the crossmember , you have to take the steering linkage off and loosen the engine mounts (not fun!!) . Remove chains and tensioners. Took an hour and a half to line the chains back up. ( the two non nissan techs didn't trust the chain markings.) Then reassembly!! in reverse!!LOL!!

Total time -- 11 hours. (darn beer !!!) The price you paid was well worth it IMO. Considering parts cost almost $400!! It was hard -- But I'd do it again in a heartbeat. The best part is that my car started right up. It was like we never even took it apart.

[Yorb]

yeah, coughing up the money doesnt irk me as much as not doing something to my car. it feels so good to do something yourself and have it improve or fix your car. =) i'm going to make myself feel better with this MAFS (hopefully), new fuel filter, o2 sensor, plugs, wires, an intake, and wheel spacers. within the next week or so (most already in shipping). =)

the main thing that turned me off of the timing chain job was the whole crossmember thing, and having to 'drop' it. sounded like a shop job, or the very least a several-guys-and-a-carport/garage-and-beer job. sounds like you opted for the second

[bokinsmowls]

I didnt drop my crossmember. Just unbolted the motor mounts and jacked up the motor using the trans mount as a pivot. Dropped oil pan to get to the pickup bolts, then ~finagled~ the oil pan out. It defintiely was more than I expected, and it took almost a whole week. And it WAS several-guys-and-a-garage-lots of beer-job. D-Unit-I didnt trust factory marks either, reassembled and disassembled cams 5X to get it right.

FYI-I probably wouldnt do it again, but Im glad I did.

[D-UNIT]

I didnt trust factory marks either, reassembled and disassembled cams 5X to get it right.

FYI-I probably wouldnt do it again, but Im glad I did.

The funniest thing was watching two professional techs line up everything perfectly , spin the crank and watch the marks move around , never to align again. They just freaked. And they get paid to work on cars. Not nissans though. It went from " we're the best and we can do anything. Let's get it started." to " we're going to kill whoever designed this engine." LOL. " Take it apart again. Aarrgh!!". All I can say is thank GOD for friends like that!!!

[bokinsmowls]

Good to hear it wasnt just me freakin. Same happened here.And Im nowhere near being a pro.