when going into third gear the rpms drop tremendously and sounds as if it had a cam and rpms will not climb at all... instead of the smooth bzzzzzz its like (2nd gear) bzzzzzzzzzzzzz-(3rd gear) bdddddddddddddddddd.... but... if i go from 3rd (while it is bogging) into 4th for like a second or two and then right back into 3rd from 4th its fine and climbs good.

secondary injectors

what does work on your car?

not a god d* thing!!! haha... when i bought the car basically it was a shell... and guy had all the parts to put it back together so i did

secondary injectors? how can that cuase it to bogg down only in 3rd gear? there brand new i just bought them from advanced

you shouldnt buy important things like injectors from advanced autoparts...seriously.



kevin.

well where else could i get them? anywhere else and im sure theyd be way too much to pay for.. anyway back to tranny problems..!!!!!!

COULD THIS BE THE PROBLEM. sorry for uppercase had to get ebveryon back on track.



2 of my omp lines broke right where they go into the lower intake manifold and 1 on one of the housings... i patched them up for a quick fix with vacuum hose tubing and alot of silicone... but by the way its acting (read first post again) i dont think thats it, although i do know that will cuase problems on down the raod...

I thought you said you were a mechanic in one post? A mechanic would never "quickfix" OMP lines...that's just asking for a blown motor. Either have a proper lubricated system, or run premix. Then, pick up a good EFI tuning manual and go standalone...with a car that has as many problems as yours, you may want to consider a compression test, stripping it down to short block form, replacing all the gaskets, use injectors made by bosch, greddy, nippon denso, etc (not from Autozone or Advance Auto or whatever), wire up a cheap Microtech ECU standalone system and go to town. Just go through the car top to bottom with genuine mazda parts or a decent aftermarket setup. It's costly, but thats why its always dangerous to buy somebody else's mess and try to fix it.

yesi am a mechanic, i work on car that have things called pistons. i did the quick fix becuase i odnt care about this motor... im actually hoping it blows so i have an excuse to get a ported rebuilt one. i mean... this motor is pretty new, but... it wasnt put in or set up by me. i dont like buying stuff from other people after theyve hacked all over it. and im new to rotarys and am learning abou tthem still. all im trying to figure out is whats making it bogg down in 3rd gear, i dont see any mechanical way its doing this, its got to be with the computer or the electrical system and since i dont have all the time in the world to sit down and go through the wiring and how the computer is set up im asking your you guys' advice becuase somebody else might have had this problem... and help would be greatly appreciated

It could be a simple load issue, maybe a short in the wiring harness causing the secondaries to trip out, lol. It's hard to get to the bottom of some issues when the car isn't right here. With as many issues that you have posted about on that car, I can't begin to think of what may cause this bogging.



Also, if your learning rotaries, and "hope the motor blows" so you can do your own setup, etc since you didn't build the one that is in it...what makes you think you can build a better setup? Use the motor for as long as you can as a learning block. You can pick up blown s4 6port motors all day for like $150 or less...just shop around. Tear it down, and learn that way. Don't blow a recently rebuilt motor just for the sake of rebuilding it.

im not putting a 6 port motor back in it. im eventually doing the t2 swap... but anywaylike i said im just asking if anyone has had this problem and if they did what the cuase was...

**** it then, throw the god damn motor out and everything under the hood and start from scratch caus eit sobvious your car right now, as it is, is buttfucked.



you're siliconing OMP lines together, swapping s4->s5 randomly bla bla bla.



seriously just throw everything in the engine bay out and start the **** over.



either that or just give it up. your car needs serious work in more then a couple areas so its either time to take it off the road and do a major overhaul of everything and double/triple check EVERYTHING...or just get rid of the damn car.



seriously.



This whole "bogging in 3rd gear" thing can be tons of things, most notably NOT the transmission, unless you have an auto tranny. hell it wouldnt even be the clutch, or pressure plate or flywheel.



You know why injectors cost a lot more when you buy them from the correct places ?(aka injector specialists or the dealer... NOT AUTOZONE) Because they're a very important part of your car and even a micrometer's worth of dirt can **** it up. its not a part you should be getting from autozone.



Check the secondary injector clips, make sure theyre fully plugged in. Replace the secondary injectors with proper ones, or have your current ones cleaned and flow tested at a PROPER FUEL INJECTION SHOP.. NOT AUTOZONE.



after that, come back to us if it didnt fix the problem. ALso try noting the RPMs when this bog happens, just generalizing 3rd gear as "bzzzzzzzzzz *3rd Gear* bddddddddd" is completely useless to anyone trying to diagnose a car over the internet.



oh and for gods sake, quit your "mechanic" job and find a new career, you obviously know nothing about cars. The only thing different about rotaries, really, is what goes on inside the motor and a few things outside such as the OMP etc. All the other systems work the same as a ******* piston car. the coils, ignitor, fuel pump, injectors, headlights, intake... bla bla bla. everything.



and one more note: i cant wait to see your posts when you try modifying this car.



kevin.

Heh Heh. Burned.

alright well this thread is usless and you guys need to grow up, im asking for some help here.





p.s. suck my wankel

you sure it doesnt bog in 4th too? i have no idea why it would only do it in 1 gear

ok here's the help:



1) FLowtest and Clean your Autozone injectors at a proper fuel injection shop, or buy new injectors from a place that specializes in injectors



2) Check your secondary injector wiring and clips make sure theyre not loose or messed up



3) Your bogging ISNT YOUR TRANS, nor your clutch, or flywheel or pressure plate.



4) Might try buying a brand new engine harness, especially since im sure you undoubtedly hacked your current one to death



5) Stop swapping **** until everything is back to running 100%, adding parts from an s5 is just going to complicate things



6) Buy new OMP lines, dont use siliconed ones, they will destroy your motor, seriously. Silicone isnt supposed to be used with oil, it deteriorates rapidly (but youre a mechanic you should know that, uh duh.)



7) Also try noting the RPMs when this bog happens, just generalizing 3rd gear as "bzzzzzzzzzz *3rd Gear* bddddddddd" is completely useless to anyone trying to diagnose a car over the internet.



and here are some possible alternatives to doing all of the above:



A) Throw everything under the hood out and start again from scratch, apparently you say you want to do this anyway



B) Give the car to a real mechanic to fix all your broken ****.







there, helpful enough for you? Oh and please hold off on modifying your car, i dont think the forum would be able to hold that many "whats wrong" topics.



kevin.

seriously, im even doubting its the injectors since its one gear only, but i dont even think the ECU knows what gear the car is in. in fact im not sure how many things in the car even know what gear the car is in.



of course, unless its automatic that changes everything.



kevin.

its got a switch for reverse, and 5th gear, but thats it. ecu has no speed input either, so it really doesnt know, 3rd gear

I think hes throwin it in 5th.

****. i dunno but its wierd as hell and i cant figure it out for nothing.

HAHA!! I love when Kevin gets in topics...makes them fun and exciting to read.

thats bwhat ive been thinking about it only *knows* reverse and 5th and the only thing that knows the speed is the speedometer, which is mechanical so that doesnt even go through the computer.



is it possibly it uses the tach or something?



i dont see any way for the car to bog specifically in 3rd.



kevin.

did everything i could with the info i got from this FAQ section, FC3Spro website, rotary ressurection website, rx7club.com FAQ. it wont go away. anyone want the car? take $1,000 bucks for it. its got 3 grand in it. cant get rid of the 3800 rpm problem and i am tired of dealing with it. ive grounded all four ecu grounds, grounded the pressure sensor ground, battery has 2 extra 4-guage grounds besides stock ground, grounded upper intake, tranny, harness ground on top of block ran back to battery, fuel pump has been grounded, new fuel pump, new secondary injectors, new plugs and fuel filter. among other things if you want the car it has all four drilled and slotted rotors, converted to 5-lug with 4 piston calipers, s5 front and rear bumpers, s5 tailights, 3 inch megan racing exhuast, new computer, new guage cluster with carbon fiber insert and glow gauges, short shifter, stage 3 clutch, new tranny, new master and slave cylinder, new front struts, new rear carpet with cargo boxes, panasonic head unit, cd/mp3, two 500 watt 6x9's , two 500 watt 5 1/4's,(both sets powered by 250 watt amp) two 4'' in dash, 2 tweeters, and 10 sub with 400 watts, dash in mint condition, door panels mint, no front carpet, seats arent the greatest, new sunroof and motor, body is good with some waves in passenger door, have extra door, extra motor and extra tranny, theres more but **** thats too much to write sombody just take this peice of **** off my hands... should have known then to buy a damn import. .... $1,000 and its yours. i am in warner robins, georgia, 31088

have you tried a Apexi AFC? Pretty sure that would fix you up.

I'll give you $50 plus shipping,lol. Don't be discouraged from imports from one bad instance.

This is an N/A right?



Have you ever seen if the 5th and 6th ports open?



I'll give you $200

5th and 6th are wired open. i mean ive treid everything. the only thing i could think of other than that is my volt gauge is reading just a tiny bit above 12 volts... most cars run at about 14 volts. got a buddy with an 86 rx7 and his volts are reading exact same as mine and his doesnt stumble one bit. other than that... i guess its going up for sale locally. either gonna get a T2 or another toyota 4x4

Damn wish I lived by ya, Ide so take it off ur hands.

how far ia georgia from NJ? i need a parts car.



kevin.

you're selling it just because it has the stumble? thats crazy man. All that money invested and just for $1000. Someone is gonna be a lucky man.

i know it... but it will not go away. ive done everything and it still does it. its annoying as hell and i have the damn 3 inch exhuast its too damn loud. i dont have the money to do anything else with it and no one on this forum will give more than a grand for it becuase thye all know about these cars. ill try to take pics of it today

lets see some pics of this beast https://www.nopistons.com/forums/pub...#>/biggrin.png

POS, is it worth $1,000 you think??? gotta be worth at least a grand. anyway... dog me out, let me know what you thinjk

You have a pm!!!

Haha see, its worth something to someone!

lol. guess so... so if i do sell it anyone want to buy those rims?

what size are the rims?

If I lived by ya, like I already said, Ide take it.

already looked in FAQ . now i need your guys's help. ok, so if youve read my other posts i still have the 3800 problem and before you ask, yes i grounded everything, and i mean everything from front to back. didnt help at all. so... i checked resistances of the crank angle sensor... good, aws valve...good, bac valve.. good, now heres 3 things i need your help on.



(1) first off, my car was built before nov of 86, and 7's built before then had problems with the ground on the pressure sensor, so i regrounded it just like they did when they had the recall back in the 80's... i have another pressure sensor tho, found it in my parts car. this one and the one on my car look exactly the same except the part numbers are different, and when i say exactly the same i mean in every way, plug and everything. old one reads (N327 6612 E1T12071) and the new one i found reads (N350 9227 E1T12272) can i use the new one?????? it plugs right up and everything.



(2) im using an s5 tps on my s4,(dont bust my balls, its the only other sensor i had) i just spliced the wires from the s5 sensor to the s4 plug, and cut the wires (so its just there, not being used) on the oil metering sensor i think is what it is. works good too, but before putting it on i checked it with an ohmeter, no opens or shorts, i went out and checked it just now and it has a big open in it from about halfway depressed to all the way to full throttle... and i have an old s4 tps laying around... does the same damn thing as the s5 one, has a short in the same area...????



(3) my volt gauge reads just a little bit over 12 volts, ide say about 12.3 maybe... shouldnt it be putting out close to 14? or are rx7's just different like that. my buddy has an 86 that reads exactly where mine does and he has no hesitation...took it to work and tested the alternator. first test read a good 14 volts, second test only brought up like 12.2 volts. so if you can remember or feel like going and starting up your second gen let me know what your voltage reads on the gauge. is there any other alternator that will fit into the stock mounts that puts out more volts.. .like from a different car ?