to start with, the car is a 89 tII and i can't seem to keep it running. it floods all of the time - short trip, long trip cold hot it doesn't matter. and it floods bad. i have a fuel pump cut off switch (does the same as pulling the egi fuse) and rarely will that be enouogh to resurect the thing without pulling plugs. now the thing is running prety rich but i thought that that was a good thing. forgive me but i am somewhat new rotaries. is it possible that all of this headache could just be a leaky fuel injector or something like that or does it point to something much bigger? the compression is pretty good and with how frequently this is happening it has pretty much new plugs and fresh oil all of the time. i would really appreaciate any help that could be offered. thanks

 

the injector seals... o rings... whatever

 

Might be a good time for a comperession test...

 

about a month ago the compression was about 90 for the front rotor and about 85 for the back. i thought that it would have to be much lower than that for it to be that cause of my problems but i'll check it again if you think that those numbers were borderline...

 

I'd start with this.

 

Get your injectors cleaned its worth money. That compression test is ok.

 

yeah i would take a compression test... low compression often causes flooding

 

is there any way to test the functionality of the injectors and/or pinpoint which one(s) may be the problem without taking all of them out and cleaning them?

 

you could test them but a) the injectors tend to leak when they are warm so it makes them hard to test accurately. b) you have to remove the fuel rails and strap the injectors to the rails to test them, compounding my last statement on a).

 

www.cruzinperformance.com does injector cleaning, i don't know for sure if this can resurrect a leaking fuel injector...i lot of people say that the pintel inside the injector is worn out and you must replace the injector but i think if the pintel seat is contaminated then it can cause an injector to stay open and leak, my 88 t2 does the almost the same thing but i can usually get mine started with my fuel pump switch.

 

you can also pull out the one way check valve in the fuel pump to allow the fuel system to drain when the car sits so no fuel can leak into the system but this is a patch to a problem, or if you do not mind the extended cranking times then it could be a permanent fix.

but

a true tuned engine relies on injectors that are clean and balanced in flow rates, if your compression is ok and fuel system checks out ok i would suggest having them cleaned, the service is only $12 per injector so it won't break your bank.

 

Sounds like it could be staying in cold start mode (open loop) and not sensing the engine warming up. This would be the water temp switch (or maybe a faulty O2 sensor). Once the ECU senses the engine warmed up it leans the mixture, maybe it's staying in cold start "rich" mode? You mentioned that it floods cold or hot and runs rich, maybe this is contributing to the flooding?

-jb

 

thanks alot for the help. i have some good directions to go in today

 

just curious where this "check valve" is located. i believe mine might have been removed.