[Carlos]

Summary:
Item1- spring unlikely weak
2-trottle cable check out
3- cam not deformed
4- screw was tight
5- are you talking about idle air control valve ?
6 – wear on trottle body,im not sure
Your suggestions 1-3: they were checked no problem

I saw this video in youtube about TPS adjustment, does this also apply to 2001 altima? Here is the pic,i dont know how to show the link

[Carlos]

Yeap, it did

[Carlos]

yeah ,p0420 has been solved and many thanks to nighflr

About the idle issue is pretty much the same, I cleaned and lubricated and still about 1100-1200 rpm at normal temperature. I tried to see if the iacv valve is working and it seems responding, it goes up around 1100 to 1500 rpm when I I tried to adjust it.

[Carlos]

Hi,so in order to clean it, i have to remove the trottle body assembly,correct? And what specific area that needs lubrication and what kind of lubricant? Thanks

[Carlos]

[quote=”Boyet” post=156040][/quote] this pic taken while engine is running at idle (warmup) 1100-1200 rpm

[Carlos]

First pic ( the one with the rust) was taken at cold start(1500-1650 rpm) and the 2nd pic(rust part covered) was taken during warmup and reached the normal temp / idle around 1100-1200 rpm)

Attachments:

• image-6.jpg
• image-5.jpg

[Carlos]

I changed the o2 sensor rear about 4 days ago using my old one cuz the new one i bought from ebay is the one giving me this p0420 code and i couldnt believed that its brand new and it went bad after 900 miles on it,,,so far the engine light hasnt come back yet after drving 98 miles on it,,, usually i will get this light on every 15-25 miles. So hopefully that is the problem,many thanks to you nighflr !
Lemme go back to my other problem on “high idle stays at 1100-1200 rpm after warmup”, its look like the idle cam arm is resting to the adjustment screw , is it advisable to touch the adjustment screw? Also what did moved on the pics,,2 spring coils top and bottom,i called them spring coils but probably they are some kind of thermistor coils? Thank you
engine just turn on,,,cold start

See the rust part area has moved,im not sure which coil did that ? Top or bottom coil (spring)?

Engine running After warmup (1100-1200 rpm)

Attachments:

• image-3.jpg
• image-4.jpg

[Carlos]

Im in New York,but my vehicle has a California emission and has secondary catalytic converter(diagram no.6)

Attachments:

• image.jpg
• image-2.jpg

[Carlos]

I need to take care of this engine code first, which of the catalytic converter as you referring to? Is it the pre-cat where the 1st o2 sensor is and located after the exhaust manifold) or the other cOnverter (after the flex pipe ) and (before the second o2 sensor)? Thx

[Carlos]

I saw the middle leverage moved slightly from cold start to warmup, can I adjust the screw (with the red arrow) ,to see if the idle goes down? also btw I got p0420 engine code , this came out suddenly(not sure if because I cleaned the idle air control valve?) thx
(the upstream o2 sensor maybe the culprit? still original part 88K miles) thank you

[Carlos]

where is this idle cam located? thx

[Carlos]

That was 45 k miles 8 yrs ago

[Carlos]

[quote=”Boyet” post=155546]Nope , no engine code, this high rpm started when The car is only 45 k miles 8 yrs ago, now it’s 88k[/quote]

[Carlos]

Nope , no engine code, this high rpm started when The car is only 45 k miles , now it’s 88k

[Carlos]

Ok,i did all of these but most of the time it stays at 1100 rpm

[Author]

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