2002 se 6spd running sluggish
#42
im taking it to another mechanic, apparently the vq IS AN INTERFERENCE engine and could have bent up some valves if the timing were off. i was talking to the Nissan Tech and he said from point one if you run the car with no oil that could very well happen.
#44
I got hold of that other mechanic in Austin, sent him the link to this thread but haven't heard back from him. Sorry I wasn't able to hook you up with him, he is an excellent mechanic. I know another one in Richardson but I doubt you want to transport your car 200 miles one way. If anyone could figure it out, he could though. Took him about 2 hours to find an on and off miss my Accord had for 2 years that no one else could find. Turned out one of the wires on the O2 sensor had worn and was randomly contacting the front engine mount on acceleration and over bumps.
#45
Keep in mind how the timing belt tensioners work, the oil keeps the tensioner tight if the tensioner does loosen due to low oil pressure it normally rattles it's A$$ off and if it moves a tooth it would normally jump more than one, this isn't a rubber belt like previous cars known for jumping it's metal on metal not alot of friction to stop it. However most other engines I've seen even when there's an oiling problem and the tensioner is making alot of noise still don't jump. Jumping a tooth on most cars won't kill the engine but will make it run so bad and usually idle bad that it's noticeable.
Also cars with bent valves typically won't start not enough compression at low RPM's if they do it takes alot. Once again I think you are going down the wrong path.
Also cars with bent valves typically won't start not enough compression at low RPM's if they do it takes alot. Once again I think you are going down the wrong path.
#50
#54
ok guys i feel kinda like a noob for this but i did just find out that you can monitor all of the engines sensors with Consult-II and i just found out that my mechanic had a snap-on reader, now i asked the mechanic to check the MAF but with a snap on is that even possible? with the maf im going to have to go up there and check it or give him directions on how to check it if its possible with a voltmeter. does anyone know how to diagnose the MAF with a voltmeter, i will start searching threads now, does the car have to be running and have someone to tap the gas?
#55
sorry about all the previous denial, i may eat my words however i will be grateful for both your advice and the cheaper repair for the MAF. Lol, go ahead ![Slap](https://maxima.org/forums/images/smilies/slap.gif)
also another question: with the snap on tool is it possible to monitor any of the sensors? or just a limited few. he just got the gauges in so hopefully the engine will throw a code for whatever is causing this, but if hes driving it around with the snap on hooked up does it (the Snap-On tool) give you alot of data? thanks all, i seriously miss my car, i took it in before thanksgiving... i forget what its like to drive it haha but i really appreciate your help, and ill keep yall updated i should have some info tomorrow.
![Slap](https://maxima.org/forums/images/smilies/slap.gif)
also another question: with the snap on tool is it possible to monitor any of the sensors? or just a limited few. he just got the gauges in so hopefully the engine will throw a code for whatever is causing this, but if hes driving it around with the snap on hooked up does it (the Snap-On tool) give you alot of data? thanks all, i seriously miss my car, i took it in before thanksgiving... i forget what its like to drive it haha but i really appreciate your help, and ill keep yall updated i should have some info tomorrow.
#56
Using the consult interface, you can monitor a whole boat load of sensors, so yes, it's a viable tool.
The procedure for checking the MAF is in the FSM. It is in the stickys.
Keep in mind, you may need to substitute the word OLD for the word SHOW in those links.
http://forums.maxima.org/showthread....light=MAF+test
The procedure for checking the MAF is in the FSM. It is in the stickys.
Keep in mind, you may need to substitute the word OLD for the word SHOW in those links.
http://forums.maxima.org/showthread....light=MAF+test
#59
ok guys well i pulled my max outta the shop where the guy had IMO no chance of finding and helping me with my problem. So, i took it to Ancira nissan and they had it for a day and said it was a maf. 790 bucks , so i said ok do it. and they did then called me and said that didnt fix it and they dont know what it is. They said wait till tomorrow when this other tech can come in and look at it and call some nissanfix number and try to get why my car is acting up. this is really mind boggling how hard it is to diagnose this problem. the guy at ancira says the chain would break before it skipped teeth. is it really that difficult for these engines to skip timing teeth. 3 MONTHS and im really startin to miss my car. anyone have any ideas???
thanks all
thanks all
#62
ya theyre gonna give me the 790 back but i told them to leave the am600 on while diagnosing it just to eliminate any speculation of a mal-performing maf. i thought about the ignition coils but its not misfiring and revs/idles smoothly.
#66
![BangHead](https://maxima.org/forums/images/smilies/banghead.gif)
![doublethumbsup](https://maxima.org/forums/images/smilies/dblthumb2.gif)
Last edited by 02SE6MT; 01-16-2008 at 10:46 PM.
#67
Yeah, a clogged cat will kill power. When my 626 got rearended, the exhaust tips got bent under the muffler and my acceleration was pretty bad until I was able to get home and bend them down.
Glad to hear it appears your car is fixed.
Glad to hear it appears your car is fixed.
![Smilie](https://maxima.org/forums/images/smilies/smile.gif)
#69
You know, all anyone had to do was put a vacuum gauge on the engine and rev it to see if the exhaust was restricted....that is one of the first things the other garage and the Nissan dealer should have done.
#71
lol...its funny how my maxima felt like chit when i first bought it...now after the cat 'blew out' whatever was restricting it..it feels like a 3.0 beast..not a 3.5 beast lol.
eventually i plan on redoing my whole catback + y-pipe.
eventually i plan on redoing my whole catback + y-pipe.
#73
ya mine had no codes at all, still doesnt just ran like crap. and HuffDaddy: no im in sa now going to utsa, bought it down here only 6 speed within 300 miles for sale.
a quick RANDOM question: anyone have any experience with NWP Engineerings' intake spacer kit? supposedly gives good results
a quick RANDOM question: anyone have any experience with NWP Engineerings' intake spacer kit? supposedly gives good results
#74
ya mine had no codes at all, still doesnt just ran like crap. and HuffDaddy: no im in sa now going to utsa, bought it down here only 6 speed within 300 miles for sale.
a quick RANDOM question: anyone have any experience with NWP Engineerings' intake spacer kit? supposedly gives good results
a quick RANDOM question: anyone have any experience with NWP Engineerings' intake spacer kit? supposedly gives good results
#75
I wish I would've saw this thread before. My cat was clogged and had the exact same issue except that it was burning oil like nuts and I think all of the back pressure blew out more oil and then it seized. It's those POS precats. They just fall apart and then guess where they go. It's freakin BS. I say nissan still owes me an engine.
#76
Im gonna be honest, i wanna understand what the bloody hell is going on but i don't get all the abbriviations...
is there any sort of index on the forums for things like:
MAF................
IAT................
CEL...............
i've had my o2 sensor go out but that's it. it would be nice to know what all the other crap is/does in case i need a repair
is there any sort of index on the forums for things like:
MAF................
IAT................
CEL...............
i've had my o2 sensor go out but that's it. it would be nice to know what all the other crap is/does in case i need a repair
#79
Are you consuming oil at all? Generally catalytic converters don't fail under normal conditions. I'm not saying it can't happen, but you see the vast majority of them fail as the result of another problem (misfiring, running rich, oil burning etc).
Best of luck!
Best of luck!
#80
For future reference the Snap-on tools can read every sensor the engine has as long as the mechanic has the up-to-date cartridges for you vehicle. The new Snap-On tool is the SOLUS and it is awsome but it cost $4000.