3800rpm smoking
12-22-02, 07:38 PM
#1
Passenger
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3800rpm smoking
been having this problem ever since i changed gas from 87 to 89 octane. So whenever i hold down the gas to around that rpm and hold it for about 2-3 secs it starts spewing smoke like crazy. i have no idea why it does that any clues?? 
12-22-02, 07:55 PM
#2
Nothing to see here.
Sounds like oil seals are shot. Is it blue smoke—burning oil? Holding the engine at 4000 rpms in neutral is a simple test of oil seal failure. If this is the case it will require a rebuild.
Let us know.
Also, if it's an N/A 89 octane isn't necessary and I don't believe this would be causing the smoking at 4k rpm. If it was gas, the smoke would be black.
Let us know.
Also, if it's an N/A 89 octane isn't necessary and I don't believe this would be causing the smoking at 4k rpm. If it was gas, the smoke would be black.
Last edited by rxse7en; 12-22-02 at 07:57 PM.
12-22-02, 08:33 PM
#4
i think its because your secondaries are not coming online (thats when they come on is 3800 rpm, under a load=having gas floored) my car used to do this. search for 3800 rpm hesitation. sometimes you cant really tell the difference between gas smoke and oil smoke when there is a whole lot of gas smoke.
12-22-02, 10:36 PM
#5
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Blue smoke is from burning oil. The aux ports do open up at aprox. 3800rpms, and if the oil seals on the rotor are wearing out, it will require a rebuild. It doesn't have to be rebuilt immediately, but the sooner the better. As time goes on, it will happen at a lower Rpm because the amount of oil pressure required to push oil past the worn seal(s) won't be as high. Eventually you will notice the smoke just from sitting and idling.
12-23-02, 11:22 AM
#7
Passenger
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i dont think its the oil seals either. but if i hold it at around 3800 it'll start to smoke if i go past it it wont. and it only happens in third gear. but its strange i dont get any hesitation at all. like if i launch my car and do all out acceleration it works fine no smoke whatsoever. but holding it there at that rpm when the secondaries fire will start to smoke. is it because im running to rich for all the fuel to burn at that point?? i did flood my car quite a bit when i stalled learning to drive stick.
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12-23-02, 05:12 PM
#9
Passenger
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welll i think i sorta pin pointed how and when it smokes now. Whenever i hit and hold the 3800 rpm then shift it smokes a lil. holding it there would cause it to smoke alot. 
and if i take my tii to redline it doesn't smoke at all. so curious what u guys think it may be. anyone elses car do this?
and if i take my tii to redline it doesn't smoke at all. so curious what u guys think it may be. anyone elses car do this?
12-23-02, 07:42 PM
#12
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dude, mine does the same thing. I was at chevron filling up on mid grade as i always do and this guy said he wanted to hear my enging run. So i started it and was letting it idle, so i took it to around 3800 and i smoked out the entire gas station people were actually getting into their cars until the smoke cleared. I was like wtf just happened. But i do remember the smoke was white. And when i startin the morning i see a puff of blue smoke for a sec or two then it goes away.
12-27-02, 12:39 AM
#14
Passenger
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sorry i couldn't reply til now was on holidays visiting my folks. uhm yea johnkean thats exactly what happened to me. i also filled my gas up at chevron going with a midgrade 89. the previous owner never had a problem with smoking with 87 grade gas and i never had one til i went to chevron. odd... and yea its like white smoke kidna smoke u see from cars exhaust in morning. but its not coolant cuz ive checked my coolant levels and all seems to be exactly same level as before. i burnt off most of the chevron gas and put in 87 from petro and most of the smoking is gone it does a few puffs at 3800 and then stops. im gonna try get rid of all that chevron crap and see if my car still smokes but as of now it gives the odd puff every time i hit 3800 for more than 5secs
01-12-03, 02:09 AM
#15
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I'm having the same problem.
I just purchased my first rx-7 last week for really cheap and I am starting to fix it up.
The previous owners flooded the engine and didn't bother to diagnose it. They sold it as having engine startup problems.
I change the spark plugs and unflooded it (which produced a HUGH cloud of white smoke that looked like a large fog bank going down the street) and the engine came to life with no problem. Smoke went away after about 5-10min.
Later when I was doing some rev test to make sure it would run fine at higher RPM's I noticed that at around 3500-3800rpm that a cloud of white smoke would start billowing out. As soon as I dropped the rpm the smoke slowely went away. Tested several time and it was consistantly starting at the same RPM.
I suspect the second injector not kicking in but I am not sure how to fix it.
(I did have a small trace of white smoke when it first started up but that went away in 10-20sec)
I replaced the oil with 20W-30 and I don't know what Octane it is, as it has nearly a full tank of gas from when I bought it.
I just purchased my first rx-7 last week for really cheap and I am starting to fix it up.
The previous owners flooded the engine and didn't bother to diagnose it. They sold it as having engine startup problems.
I change the spark plugs and unflooded it (which produced a HUGH cloud of white smoke that looked like a large fog bank going down the street) and the engine came to life with no problem. Smoke went away after about 5-10min.
Later when I was doing some rev test to make sure it would run fine at higher RPM's I noticed that at around 3500-3800rpm that a cloud of white smoke would start billowing out. As soon as I dropped the rpm the smoke slowely went away. Tested several time and it was consistantly starting at the same RPM.
I suspect the second injector not kicking in but I am not sure how to fix it.
(I did have a small trace of white smoke when it first started up but that went away in 10-20sec)
I replaced the oil with 20W-30 and I don't know what Octane it is, as it has nearly a full tank of gas from when I bought it.
01-12-03, 02:52 AM
#16
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Yea, I bought my RX7 they said the engine and clutch were in perfect condition, when I test drove it I didnt see any smoke at all at start up or at higher RPM's hopefully that doesnt happen to me, also whats the recomended oil for a FC n/a
01-16-03, 08:52 PM
#19
Passenger
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the car is strating to frustrate me.. i seemed to narrow it down when it starts to boost then teh huge smokes appear. and im 100% positive it is oil being burned because im losing oil at an extremely fast rate. anyone have any idea fix this? im just about ready to give up 
i seemed to narrow it down when it starts to boost then teh huge smokes appear. and im 100% positive it is oil being burned because im losing oil at an extremely fast rate. anyone have any idea fix this? im just about ready to give up
01-16-03, 10:55 PM
#20
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I'm 99% sure what you were seeing from the tail pipe is burnt oil, be it white or blue. I'm at 100mile/qt
It would smoke like crazy right after 6k for a while, recently down to 5k, while in neutral. I really can't see a whole lot of smoke while driving since my rear window is tinted.
btw, your secondaries should only kick in under load; simply flooring it to redline won't activate those guys.
It would smoke like crazy right after 6k for a while, recently down to 5k, while in neutral. I really can't see a whole lot of smoke while driving since my rear window is tinted.btw, your secondaries should only kick in under load; simply flooring it to redline won't activate those guys.
01-16-03, 11:05 PM
#21
Passenger
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no i am putting it under load. been practicing my *ahem* launch 
and i would just simply pin it all the way to redline and it would puff smoke. i too am losing a quart every 100mile so i dunno what to do. this to me dont seem normal so there has to be something wrong. also its only when im boosting will it smoke normal daily driving it'd drive like a brand new car. its odd too cuz if i drove it at a steady pace around the 4k area it would smoke so bad drivesr behind me would swerve to the other lanes and try and pass me. so im at a loss here guys any help would do 
and i would just simply pin it all the way to redline and it would puff smoke. i too am losing a quart every 100mile so i dunno what to do. this to me dont seem normal so there has to be something wrong. also its only when im boosting will it smoke normal daily driving it'd drive like a brand new car. its odd too cuz if i drove it at a steady pace around the 4k area it would smoke so bad drivesr behind me would swerve to the other lanes and try and pass me. so im at a loss here guys any help would do
01-17-03, 07:44 AM
#22
Nothing to see here.
Originally posted by rxse7en
Sounds like oil seals are shot. Is it blue smoke—burning oil? Holding the engine at 4000 rpms in neutral is a simple test of oil seal failure. If this is the case it will require a rebuild.
Let us know.
Also, if it's an N/A 89 octane isn't necessary and I don't believe this would be causing the smoking at 4k rpm. If it was gas, the smoke would be black.
Sounds like oil seals are shot. Is it blue smoke—burning oil? Holding the engine at 4000 rpms in neutral is a simple test of oil seal failure. If this is the case it will require a rebuild.
Let us know.
Also, if it's an N/A 89 octane isn't necessary and I don't believe this would be causing the smoking at 4k rpm. If it was gas, the smoke would be black.
I'm sticking with my first diagnosis.
01-17-03, 07:08 PM
#23
Passenger
Posts: n/a
hehe thx se7en i'll check that out but is there a more inexpensive approach to solving this? could there possibly be some wear on the turbo oil lines or some sort and its just squirting oil down my exhaust or something? i just wanna find out all the symptoms that may cause smoking in boost
01-17-03, 07:46 PM
#24
Keep Right Except to Pass
If it's smoking under boost then check the turbo. If it's not the turbo then it's gonna need a rebuild.
I thought I saw in there somewhere that it was a TII.
My $0.02
I thought I saw in there somewhere that it was a TII.
My $0.02
03-27-07, 11:17 PM
#25
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Does anybody have any news on this? haha Im having the same issue, maybe I shouldnt be putting 92 octane in?? Im going to try the whole no in gear reving thing tomorrow. (so it doesnt use secondaries.)
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