chrisw80

iTrader: (8)

hi

i have an 87 t2 with a j-spec engine if that matters and i searched the rx7 club for a wile and couldn't find the anwser to my problem. everything is stock so and (compression is good new engine) anyway i go to crank the car and it cranks and i have to keep my foot on the gas to keep it going. its got all new vac lines so its not a vac leak. I can start the car without steping on the gas pedal and it will rev up to 1500 rpm's and the go right down to 0 and ill have to restart the car. now i can start it and it will rev up and i have to keep my foot on the gass the car will run for a few minits and than go right down to 0 agin.

now theres the weird part. i start the car and give it gas and whell im doing it pull the return line off on the fuel rail and i will not see any fuel coming out is there a check valve in there somewhere? or something. dose anyone know why it would do this my guss is that all the fuel is being dumped down the injectors but why what would cause them to stay open like this. thanks any help on this would be great and i know on the j-spec the fuel lines are backwords to the a-spec and i can swap them around and it makes no differance.

KeloidJonesJr.

iTrader: (8)

TPS. You need more TP for you bunghole.

HAILERS

IF you jumper the fuel pump check connector and turn the key to ON, the fuel pump should run continuosly. You should hear the fuel passing thru the fuel rail and dumping back into the tank.

Pull the return line off while doing the above. Fuel should flow out the return.

The FPR acts as a check valve. Anyting over approx 37psi in the fuel rail gets dumped back into the tank.

Without the fuel pump check connector jumpered, the fuel pump does not run just because you put the key to ON. IT only runs is the fuel pump check connector is jumpered and the key is to ON........Or the engine is actually running, then the pump runs.........Or anytime you HOLD the key to START, the fuel pump runs. IF you hold the key to START and then let go, and the engine did not start, the pump will NOT run.

There is no such thing as turning the key to ON and the pump PRIMING the fuel rail. That is just plain non sense.

IF you can keep the enigne running by holding the pedal down, say for five minutes or whatever, then you let off the throttle, and the car dies, I'd say your idle is not set right.

I doubt it's a tps problem at all. If you think it is, then disconnect the tps. I'll bet the car acts the same.

See the FSM for setting the idle. It's a combination of putting the initial set coupler in, setting the timing RIGHT with a TIMING LIGHT. Adjusting the variable resistior if needed and adjusting the fast idle cam/thermowax/fast idle screw etc.

If you think its a vacuum problem with the vacuum tubes, then just cap off the bottom nipple on the front of the throttle body and the bottom nipple on the back of the throttle body.

Make sure you don't have the fuel injector air bleed connected to a vacuum source nor the oil injector spider connected to a vacuum source.

Read and take to heart this: http://www.teamfc3s.org/info/articles/idle.html

chrisw80

iTrader: (8)

where is the fuel pump check connector located thanks.