clsummers8604

Okay, I bought this 1990 mazda rx7 it has 99,405 miles on it. It wasn't running when i bought it the car has sat for 4 years. I got it for $500 i have put a new battery, new fuel pump, new fuel filter, new starter, a good used ecu, and new fuel injectors with new connectors, changed the oil, replaced vacuume lines, new spark plugs, and a used fuel selonoid resistor. All of this i have done and the thing still will not run, it fires up like its going to run and then dies. I have unflooded it several times. What else could it be are the apex seals bad? I mean it acts like it wants to run but it dies as soon as it starts up. I'm about to part the car out, It has been nothing but a money pit by far the worst investment i have ever made! EVER! Someone please help me save this car!

Rx7_Nut13B

iTrader: (1)

Pull start the car

it sounds like it is really flooded, if you pull start it, you will be able to get it up in the rpm range 3-4K then turn the key on to start

Keep the RPM's up untill you feel it will idle.

pal69

Hows the compression? You'll know if you have bad seals or housing generally by that, you said the car will fire but not run? is it getting fuel, hows the pressure does the pump run and power up properly? Im having the same problem with mine, bought it not running i've ended up finding that there is a fuel pump resistor/relay inline with the pump and it seems to run the injectors as well as the pump, its a low resistance resistor and can be easily checked, other then that, just make sure that you have proper spark, fuel, airflow and compression. Good luck

80DrIfTeR

iTrader: (1)

okay had the same problem on mine. try this: unplug the AFM and crank it. if u have someone help u, its easier. go to the AFM and feel inside as u crank the car. if u feel the door open easily, the problem may be elsewhere.... next, plug the AFM back in and key on but no crank. then reach in and push the AFM door, if u hear the fuel pump kick on and start pushing fuel around the problem lies elsewhere. if not, then the AFM is bad.
NEXT: go back to the basics. pull the dizzy out, realign the motor to "TDC" then align the dizzy according to the FSM and attempt start. make sure u check the ignitors inside the dizzy and see if they are in good shape. let me know what u got.

rxtasy3

iTrader: (2)

well u've done quite alot. but u didn't put in the "things done" list of cleaning out the fuel lines and draining the tank, putting in fresh gas. i'm sure u did that.....right? as for worst investment? u can still get way more parting it for what u have in it. but yeah, u bought a rotary that's been sitting for 4 yrs. what was u really expecting?

80DrIfTeR

iTrader: (1)

well i would hope he would drain the turpentine out of the tank first and foremost but who knows....
DONT TRASH THE CAR make her run. keep the rotary alive!

clsummers8604

YES that was the first thing i done, The tank and lines are clean, the fresh fuel is a 100:1 premix i did that since the motor hasnt been ran in awhile.

clsummers8604

Okay i am going to try that stuff tomorrow sounds helpful thank you, what i done tonight i unflooded it again and i loosened the crank angle sensor aka i think the dizzy, i turned it all the way to the left and i cranked the car it fired up and it was at a poor idal i was pressing the gas pedal back and forth and it stayed at about 500 to 600 rpms then it died, i pulled the plugs out and it was flooded again. I'm clueless at this point this is my first rx7 i know a little bit of stuff but not alot just what i have read and remembered.

Mez

Yeah +1 to checking the crank angle sensor. i had similar symptoms (started then died, started just ran and then died, and flooded all the time) after replacing the front cover gasket. took the CAS out put it back in one tooth over started up right away.

80DrIfTeR

iTrader: (1)

i still say its the dizzy!