Hi





thanks for reading this. I have an 87 t2 rx7 with a new j-spec engine installed and im so frustrated with it because its bin like 2 years and I've tryed everything to get my car to idle. and i do have good compression (new engine) only 200 miles on new engine.



ok heres the problem i can start the car and i have to keep my foot on the gas or the car will stall out / turn off / the engine will just die on me. and it will not idle at all no mater what i do and I've driven it like this a few times and i get really bad gas mileage on it. I have more miles on the back of a tow truck than i do driving it. I've already checked for vacuum leaks in fact I've replaced every vacuum hose on there 3x's already I've replace the lower intake mainifold uper intake mainifold did the throttle body mod, disconnected 2endary injectors to see if there staying on for some reason but i plugged them back in because thats not it I've tryed every trick in the book. and i can dissconect the bac plug on the side of the mainifold and it makes not differance. Ive replaced the entire wiring harness. changed out ecus with several different ones including the same moddle but a different one.

dose anyone have any idas at all? the car will not idle i can rev the car up and down just fine and with my foot on the gas and i can drive it but there is no idle at all even when i screw in the idle stop screw to try and hold the idle up i can get it to go blow 15k - 1k rmps the lowest ive ever bin able to hold the throttle open was 1k but that only lasted for like 1min at the most. dose anyone at all have any idas ive read most of the fsm online and have tryed everyting and nothing has worked ive also searched the entire rx7 club data base and nothing. if anyone has any possable idas on what this could be please let me know. thanks

There's nothing more frustrating than a mechanical problem that just can't seem to be fixed. You said you replaced the vacuum lines. Good, because your problem sounds like classic vacuum leak. Did you also replace the UIM and LIM gaskets? Good quality, untorn gaskets and a coating of silicone or RTV.



Also check..clogged fuel filter, clogged Cats, fuel pump pressure, correct CAS alignment and correct engine timing.



Then, finally at some point you may just have to bite the bullet and take the car to a Mazda shop or a certified Mazda mechanic and let them do the job.

turbo inlet duct? these cars are super picky about vacuum leaks, even a little one can cause a low/no idle/flooding

hi



ive checked for clogged fuel filter, clogged Cats, fuel pump pressure, correct CAS alignment and correct engine timing. many times over and have replaced them all and it makes no differance at all i am now going to install blockoff plates all the way around and see if it makes any differance. and ive had it to 4 differnt local rotary shop and noone car figure it out. so ive tested everything i possably can and replaced it and its made no differance. so im out of ida's

mine used to flood on every hot start, it turns out that the vacuum lines @the acv were backwards. once i put em right it wanted to start hot.



yours is prolly a bac acv (they can leak internally), blown intake gasket, or some other vacuum leak