having a problem with my maxima (LONGG STORY)
10-09-2009, 09:36 AM
#1
having a problem with my maxima (LONGG STORY)
ok guys.. since i have decided to take my car to the school and give the UIM a major clean out, including the IACV and EGR and replace the PCV hose and other goodies. this is what i have done so far.
I have Cleaned out EVERYTHING. I got the UIM sandblasted and cleaned on the inside. Nice and shiny.. I sandblasted the EGR, and soaked it in a bucket of Carb Cleaner for about 3 hours.. and took some wires to clean the inside of it. (i have no idea that that thing is called.. o_O long rod with stiff wires coming from the top?) Cleaned the sensor that was on the EGR (sandblasted the health out of it.) Cleaned the IACV, Cleaned the Throttle body itself.
Now this was done on the maxima. when i had the UIM off
But i will replace fuel pump ASAP on monday.
other than that, i still thikn the car won't crank even if i do change the fuel pump... other than that, is there anything else i should check for? anything i should do at this moment? Any help is greatly appreciated. thanks!
SORRY for writing in SO MUCH detail of what i did to it.
I have Cleaned out EVERYTHING. I got the UIM sandblasted and cleaned on the inside. Nice and shiny.. I sandblasted the EGR, and soaked it in a bucket of Carb Cleaner for about 3 hours.. and took some wires to clean the inside of it. (i have no idea that that thing is called.. o_O long rod with stiff wires coming from the top?) Cleaned the sensor that was on the EGR (sandblasted the health out of it.) Cleaned the IACV, Cleaned the Throttle body itself.
Now this was done on the maxima. when i had the UIM off
- Injector balance test. Injectors working fine
- Noid Light test- all injectors were getting electricity.
- Spark test (spark plugs are NGK G-Power)
- Checked Fuel Pressure. (fuel pressure reading 27.. when it should be 49-/+.. then i closed the return hose to do the fuel pressure test again and the fuel pressure should have read sky high close to around 80 or so... but nope. still read 27 pressure. and this was when you switch it to on, and it read the same when you crank it, (turn it over)
- Cleaned MAF
- Checked wires
- Cleaned the CPS sensor
- replaced knock sensor
- checked the fuse to the fuel pump. everything is good according to my eyes.. well, at least the fuses were.
- Made sure IAT sensor was clean and working, and it was
- tested coil pack with an ohm meter, and they all check out good. forgot what the reading were, but according to alldata they checked out fine. (but the inside where the spring sits, is kinda dirty.. need to clean them)
- checked valves, and there is 0 carbon buildup on all of them. (shell with nitro helps GREATLY)
- Replaced fuel filter
- checked all vacuum hoses, nothing cracked, nothing broken, all hoses are back in place. (correctly)
- Cleaned EGR tube, replaced gasket, and thanks Navfe for letting me know the EGR gasket has to be on right, and It is.
and by the way, the hacking mod WAS needed if you want to take the EGR tube off. Search the .org, you will find some great information and pictures. I printed that whole thread and kept it in a place where i can use it later.
But i will replace fuel pump ASAP on monday.
other than that, i still thikn the car won't crank even if i do change the fuel pump... other than that, is there anything else i should check for? anything i should do at this moment? Any help is greatly appreciated. thanks!
SORRY for writing in SO MUCH detail of what i did to it.
Last edited by dkillahster; 10-09-2009 at 09:43 AM. Reason: title edit
10-10-2009, 12:04 AM
#10
Junior Member
Join Date: Oct 2009
Posts: 13
Hi dkillahster,
I performed a similar cleaning maintenance a week ago on my car (UIM, EGR, IACV, Fuel Filter, Gasket). When I put everything back together the maxima would start but I had to keep the gas pedal down to keep it running (barely). My problem was the IACV was on its last leg and I washed that leg out when I cleaned the it. I replace the IACV and now the maxima can idle. You can try to do the idle relearn procedure if you think your IACV is still good. Just be aware that it is common for the IACV to short out your ECM.
http://forums.maxima.org/5th-generat...-5-5-gens.html
http://forums.maxima.org/5th-generat...00-2001-a.html
http://forums.maxima.org/5th-generat...questions.html
On idle the motor shaked and smell from all the cleaning product that polluted the oil. The rumbling went away after changing and rinsing the motor oil. If you are sure the IACV is not your problem I suggest you look at the MAF next because you are rpm-ing under 3000.
Btw since you just took out the UIM maybe you can help me with this unknown bolt with a hugh washer that's driving me nuts.
I think I took it out from the back of the UIM area when I was trying to take off the two bolts on the support bracket. I've been trying for days to feel for a hole and look with a mirror for where I can put it in but I'm just not sure. Did you happen to run across this bolt and remember where it would go?
Thanks,
a
I performed a similar cleaning maintenance a week ago on my car (UIM, EGR, IACV, Fuel Filter, Gasket). When I put everything back together the maxima would start but I had to keep the gas pedal down to keep it running (barely). My problem was the IACV was on its last leg and I washed that leg out when I cleaned the it. I replace the IACV and now the maxima can idle. You can try to do the idle relearn procedure if you think your IACV is still good. Just be aware that it is common for the IACV to short out your ECM.
http://forums.maxima.org/5th-generat...-5-5-gens.html
http://forums.maxima.org/5th-generat...00-2001-a.html
http://forums.maxima.org/5th-generat...questions.html
On idle the motor shaked and smell from all the cleaning product that polluted the oil. The rumbling went away after changing and rinsing the motor oil. If you are sure the IACV is not your problem I suggest you look at the MAF next because you are rpm-ing under 3000.
Btw since you just took out the UIM maybe you can help me with this unknown bolt with a hugh washer that's driving me nuts.
I think I took it out from the back of the UIM area when I was trying to take off the two bolts on the support bracket. I've been trying for days to feel for a hole and look with a mirror for where I can put it in but I'm just not sure. Did you happen to run across this bolt and remember where it would go?
Thanks,
a
Last edited by acclimate; 10-11-2009 at 06:53 PM.
10-10-2009, 09:31 AM
#12
Hi dkillahster,
Btw since you just took out the UIM maybe you can help me with this unknown bolt with a hugh washer that's driving me nuts.
I think I took it out from the back of the UIM area when I was trying to take off the two bolts on the support bracket. I've been trying for days to feel for a hole and look with a mirror for where I can put it in but I'm just not sure. Did you happen to run across this bolt and remember where it would go?
Thanks,
a
Btw since you just took out the UIM maybe you can help me with this unknown bolt with a hugh washer that's driving me nuts.
I think I took it out from the back of the UIM area when I was trying to take off the two bolts on the support bracket. I've been trying for days to feel for a hole and look with a mirror for where I can put it in but I'm just not sure. Did you happen to run across this bolt and remember where it would go?
Thanks,
a
I still have those bolts in my pocket.. I have problems trying to get them back on too.. and when i took those bolts out, a bracket fell somwhere, i couldn't find it anywhere. But if i am able to get my had in there i'll let you know.. but i have to wait till monday, because the school ios closed now. and my baby is in the shop..
And with the IACV, i cleaned it too while i was taking everything apart, i doubt i put that with all the information above.. I'm still thinking the fuel pump reading that low of pressure may have a problem.. But misfire? if everything checks out from the injectors to the sparks. how can there be a misfire?
just had to resolder in the wires to the maf.. because if you remember, maybe not, that i had my intake down into the engine. like right in front of the radiator. and I figured i can place my MAF right down there as well, so back then, i had soldered the wires to be longer to reach the filter, but now, i resoldered in the wires to the right lenght and the MAF is sitting the way it should. and all voltages check out on the MAF with my voltmeter..
10-10-2009, 10:00 AM
#13
I still have those bolts in my pocket.. I have problems trying to get them back on too.. and when i took those bolts out, a bracket fell somwhere, i couldn't find it anywhere. But if i am able to get my had in there i'll let you know.. but i have to wait till monday, because the school ios closed now. and my baby is in the shop..
And with the IACV, i cleaned it too while i was taking everything apart, i doubt i put that with all the information above.. I'm still thinking the fuel pump reading that low of pressure may have a problem.. But misfire? if everything checks out from the injectors to the sparks. how can there be a misfire?
just had to resolder in the wires to the maf.. because if you remember, maybe not, that i had my intake down into the engine. like right in front of the radiator. and I figured i can place my MAF right down there as well, so back then, i had soldered the wires to be longer to reach the filter, but now, i resoldered in the wires to the right lenght and the MAF is sitting the way it should. and all voltages check out on the MAF with my voltmeter..
And with the IACV, i cleaned it too while i was taking everything apart, i doubt i put that with all the information above.. I'm still thinking the fuel pump reading that low of pressure may have a problem.. But misfire? if everything checks out from the injectors to the sparks. how can there be a misfire?
just had to resolder in the wires to the maf.. because if you remember, maybe not, that i had my intake down into the engine. like right in front of the radiator. and I figured i can place my MAF right down there as well, so back then, i had soldered the wires to be longer to reach the filter, but now, i resoldered in the wires to the right lenght and the MAF is sitting the way it should. and all voltages check out on the MAF with my voltmeter..
10-10-2009, 01:57 PM
#14
10-10-2009, 05:49 PM
#16
Hey dkillahster How do you check the fuel pressure
I have some fuel related problems too i thinks.
I have some fuel related problems too i thinks.
10-10-2009, 08:19 PM
#17
That bolt has a huge washer, and looks just like one that goes to the egr guide tube.
When I cleaned the tb, iacv, egr tube, and maf on mine I also adjusted the throttle cable. Fired it up and was getting the rpm spike like you did. Turns out I adjust the cable WAY too much, it left the throttle open about 25% or so, even without pushing on the pedal.
The two bolts on the back of the uim, the ones that hold mounting brackets, do not need to be replaced, so I hear. The bolt MIGHT be from that.
Make sure all your connectors are in, and hoses connected.
When I cleaned the tb, iacv, egr tube, and maf on mine I also adjusted the throttle cable. Fired it up and was getting the rpm spike like you did. Turns out I adjust the cable WAY too much, it left the throttle open about 25% or so, even without pushing on the pedal.
The two bolts on the back of the uim, the ones that hold mounting brackets, do not need to be replaced, so I hear. The bolt MIGHT be from that.
Make sure all your connectors are in, and hoses connected.
10-11-2009, 12:29 AM
#19
The car will turn over.. start, and die instantly.. but the day before that, it started up and had those rpm "spikes"
but funny thing was. it read a misfire code, IACV code, and the CPS sensor. then when i go in the next day.. the codes were gone.. weird
but funny thing was. it read a misfire code, IACV code, and the CPS sensor. then when i go in the next day.. the codes were gone.. weird
10-11-2009, 12:32 AM
#20
Hey dkillahster How do you check the fuel pressure
I have some fuel related problems too i thinks.
I have some fuel related problems too i thinks.
well, you can do like i did.. Use the tools at our shop. which was a MAC TOOLS Fuel Pressure Guage. You hook it up inline with your fuel system. Like wise, where your fuel filter is at. or you can have the fuel filter off.
Fuel pressure should read 37 or so at idle, and 42-49 at start-up. so i hope this helps. And if you clamp off the return hose and do another reading, the reading should go sky high. like in the 80psi or so..
10-11-2009, 07:18 PM
#25
Junior Member
Join Date: Oct 2009
Posts: 13
That bolt has a huge washer, and looks just like one that goes to the egr guide tube.
When I cleaned the tb, iacv, egr tube, and maf on mine I also adjusted the throttle cable. Fired it up and was getting the rpm spike like you did. Turns out I adjust the cable WAY too much, it left the throttle open about 25% or so, even without pushing on the pedal.
The two bolts on the back of the uim, the ones that hold mounting brackets, do not need to be replaced, so I hear. The bolt MIGHT be from that.
Make sure all your connectors are in, and hoses connected.
When I cleaned the tb, iacv, egr tube, and maf on mine I also adjusted the throttle cable. Fired it up and was getting the rpm spike like you did. Turns out I adjust the cable WAY too much, it left the throttle open about 25% or so, even without pushing on the pedal.
The two bolts on the back of the uim, the ones that hold mounting brackets, do not need to be replaced, so I hear. The bolt MIGHT be from that.
Make sure all your connectors are in, and hoses connected.
. I've been feeling for a protruded round circle because the washer has a perfectly round un-rusted circle on it. When I look at the pictures again I can actually see the un-rusted shape of the egr valve on the other side of the washer - I had the washer on backwards. I guess I must've dropped the other washer because I only have one in my pocket. After seeing how other users on this forum screw the bolts back in place to hold it I'll strive to never hold bolts in my pocket again. Thanks,
acclimate
Last edited by acclimate; 10-11-2009 at 07:21 PM.
10-13-2009, 01:52 PM
#26
Problem solved Max runs like a champ
Figured it was the MAF, just like BLACKWIND said it was. *cough*
Replaced my 96 maf for a 99 from a JY. She runs better now. with the EGR Cleaned, i can feel a BIG power difference. And for some reason, she growls a lot louder too.. o_O but anywho. Thanks to all of you who chimed in for the help. Big thanks to Blackwind!!
Replaced my 96 maf for a 99 from a JY. She runs better now. with the EGR Cleaned, i can feel a BIG power difference. And for some reason, she growls a lot louder too.. o_O but anywho. Thanks to all of you who chimed in for the help. Big thanks to Blackwind!!
10-13-2009, 02:06 PM
#27
Figured it was the MAF, just like BLACKWIND said it was. *cough*
Replaced my 96 maf for a 99 from a JY. She runs better now. with the EGR Cleaned, i can feel a BIG power difference. And for some reason, she growls a lot louder too.. o_O but anywho. Thanks to all of you who chimed in for the help. Big thanks to Blackwind!!
Replaced my 96 maf for a 99 from a JY. She runs better now. with the EGR Cleaned, i can feel a BIG power difference. And for some reason, she growls a lot louder too.. o_O but anywho. Thanks to all of you who chimed in for the help. Big thanks to Blackwind!!
10-21-2009, 05:16 PM
#29
10-21-2009, 10:00 PM
#30
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