Heres what's going on. About 4 minutes after filling up on sunoco 93 octane gas I was at a light. I floored it in first gear and at the top of first my car went crazy. Out of no where the engine bogged way down and I heard it back fire. The motor would not alow me to do more then 10% throtle and I could only do 5MPH in first, 10 in 2nd, 20 in 3rd, etc. If I did more then about 10% throtle or if I went higher then hte listed speeds in each gear I the car would start shaking real bad nad ona few occasions in back fired(bang noise). When I put the car in nuetral bringing RPM's down the motor almost stalls and then comes back to life. At idle it seems to idle ok except about every 20 seconds it bogs way down and then comes back to life. The check engine light came on right after the incedent first occured.


Few things to note, I raced a G35 about 10 minutes before, and of course I smoked him bad . I don't know if racing had any thign to do with this cause the problem seems to be electrical.

Also the car is running extremly rich. ohh and I just had a o2 sensor and a MAFS replaced under warranty. Could this be another MAFS problem? Possibly a bad coil? I need ideas and advice, any help is greatly appreciated! Thanks

 

Your car hardly runs AND YOUR NAD IS BACKFIRING??? I can't even imagine what that feels like...

seriously, hope you get it fixed soon. And it sounds like MAF from other descriptions posted here.

 

how cold is it in your area?

doesnt the car run a little bit more rich when its colder out?...just thought about something, its 99% not it

 

It's my MAFS, AGAIN! I just unplugged the MAFS and the car ran better! LOL! What a relief, at first I thought I killed my motor

Pros
I have to give props to nissan for having a back up system if the MAFS goes out. It's like a life support system If you try hard you can still get the car to move, if you ever find your self in this situation you can still drive the car home(barely). Unplug the ECU too cause the MAFS causes the car runs a bit better with it unplugged.

Cons
Nissan really screwed up making these MAFS, then they have the nerve to sell them at a rediculas price. Get your act together and have a TSB offering a inproved MAFS. I love nissan and I don't wanna have to make this my last nissan..

 

i dont htink its the MAF, because he could rev to like 2500 rpm,
maybe somethign is wrong wti the ECU, air to fuel ratio is scrwed up

 

so now your car is going to be at the dealer another 10 more days



j/k

 

You mean 11

 

Sounds to me like you need new coils.. Mine did similar when mine went bad.. I would start car, take off, then it would start to putter then srvc engine light came on and it would hardly move at all. Then after a while it would run no problem but srvc engine light would still be on. Dealer said I had a bad coil, they installed all new coils under warranty, and never had problem again..

 

Emax, I had the exact same problem. I had only had the car for one week (still nervous about driving my first manual). I pulled up to an intersection after running it hard ONCE in 4th gear. The car started sputtering and choking. I had to make an immediate left into a strip mall. I shut it down and waited 5 minutes. Started back up fine. I pulled back out to the same intersection and it starts acting up again. I could only drive it 150ft. In 1st I could only get up to 10mph, 2nd to 20, and it wouldn't make it to 3rd. I stopped and let it idle in the parking lot. The tach was bouncing between 0rpm and 1100rpm. I shut it down again, this time for 20 minutes. I started it back up with no problems and idle was smooth. I drove it home and haven't had a problem since.

 

so... why not get the specs on the MAF and see if you can outsource/retrofit a better one? it's clear that the MAF issue is not going away anytime soon.

 

Great plan but how am I going to get the specs on a MAFS? I can't even amagine how I could find another one that would work.

 

just a thought. see Calsonic all over your car? Nissan doesnt really make that much of it. they dont even make our glorious transimssions :/

I doubt its possible, it was just an idea

 

Tim I think it is possible. Just ohm out the MAF and see what is brings up. If you can find another one similar to that, it should work out just fine. Im thinking towards the I35 ones. If you against Nissan ones, then going to have to look elsewhere.

Dixit

 

pull your plugs and check those out as well. If you were running super rich, they could have been fouled up too....

 

I just got a 2k2 6 speed and scheduled a 30 k service. I had the service manager check to see if any recalls needed to be done on the car. He said that there was a recall for a throttle sensor. He said the symptom were after full throttle acceleration the vehicle would go into limp mode. It would not be able to go above 2,500 rpm.

Sounds like the problem you are describing. Good luck.

 

Emax-

It sure sounds like the limp home mode Nissan likes to describe in their brochures. Nissan sure is happy about this "limp home mode" thing. Maybe it's because a lot of these late model Nissan's get to use this system on a regular basis I guess we really can't fault Nissan for the crappy MAFS they're using now beause they aren't the ones that build them.

Anyways, I know this will pain you greatly, but there sure seems to be an inherent problem with the 2k2+ Maxima and aftermarket intakes. It may be time to reinstall the stock intake system to see if your problems go away. The stock intake really isn't that bad, especically after you remove the resonators. It may be worth a try because you'll only loose a few HP/TQ and have a much greater peace of mind.


Dave