PLZ PLZ HELP,RPM Problem,cant Find Solution

[racer]

Ok guys I'll try to explain this somehow.I dont drive car for few days,then I start it up and it starts perfectly like new car.It idles normal at around 1300 rpm and with the the temperature going up the rpms are going down as it should be.Now the thing is that while the car is heating up the rpms are droping for like a sec and it drops like for example
from 1300 to 1100 and then goes up to 1300 again,then it does it again after like 10 sec. If the engine runs ok it goes like brrrrrr and when this shit comes is like brrrrrrrBOU .It is like someting cuts the air or fuel for a second.It does it only at idle.Then when it warms up doesnt do it at all or if it does it,it is very easy, hard to notice.I had brand new steper motor like an year ago cuz the old one was bad.After that it was runing fine until now.I checked the ECU and it is fine everyting is working normal so I do not think that it is the ECU.I chek the plugs and wiers everyting is perfect and it sparks perfect.My timing sensor and trotle position sensors are in perfect condition and all work fine.
PLZ PLZ SOMEONE HELP ME.I can not drive my car if there is someting that isnt normal,I just dont feel comfortable driving it while there is someting that isnt right with it.

 

[Eclipsed]

Originally posted by racer
Ok guys I'll try to explain this somehow.I dont drive car for few days,then I start it up and it starts perfectly like new car.It idles normal at around 1300 rpm and with the the temperature going up the rpms are going down as it should be.Now the thing is that while the car is heating up the rpms are droping for like a sec and it drops like for example
from 1300 to 1100 and then goes up to 1300 again,then it does it again after like 10 sec. If the engine runs ok it goes like brrrrrr and when this shit comes is like brrrrrrrBOU .It is like someting cuts the air or fuel for a second.It does it only at idle.Then when it warms up doesnt do it at all or if it does it,it is very easy, hard to notice.I had brand new steper motor like an year ago cuz the old one was bad.After that it was runing fine until now.I checked the ECU and it is fine everyting is working normal so I do not think that it is the ECU.I chek the plugs and wiers everyting is perfect and it sparks perfect.My timing sensor and trotle position sensors are in perfect condition and all work fine.
PLZ PLZ SOMEONE HELP ME.I can not drive my car if there is someting that isnt normal,I just dont feel comfortable driving it while there is someting that isnt right with it.

Check ALL of your fuel injectors. This could be the problem.

If not I would say make sure that your TPS is really as good as you think. Could also be a throttle body related problem. Like most cases I cant really explain what I think this is without seeing it or hearing it.

 

[racer]

yea i know that it is hard to tell with out see or hear it acting but I ll check again.What did u mean by check the injectors?check for what?

 

[BOBS90TURBO]

Sounds like the ISC motor, I have idle probs myself and been looking into it last few days.

 

[Eclipsed]

Originally posted by racer
yea i know that it is hard to tell with out see or hear it acting but I ll check again.What did u mean by check the injectors?check for what?

Check the O rings on them. Some might be warn away. A good way to chekc this is to take em out and look.

This could also be the ISC motor as stated above. This really does seem like it is Throttle body related though. I could be wrong. Hope any of my info helps, I cant do much wihtout being there.

 

[racer]

see the thing is that we cked the ISC and it came up fine so i gess it is not it too.I duno I hate DSM. My Camry is 18 years old with 300K miles and i drive it with no oil and it is working perfect ,never problems.

 

[96eclipsers88]

have you checked the mass air flow or the IAC? im having a similar problem with mine its breaking up RPMs completely at 3200 it wont go past that driving or not its very anoying bc i cant fig out whats causing mine either. so hey could be worse bro.