Rotary Ronin

I have a 91 turboII and I was told my car has an fd3s fuel pump on it and i was also told the reason for it not idleing when it warms up is because of a stuck open fuel injector. I was going to replace the fuel injectors with stock 550cc ones. but since i supposebly have an fd3s fuel pump on it (which is bigger im told) can i upgrade the injectors? if so what size? thanks!
Also i was told the car has a street port and fuel cut eliminator if that helps any thanks again!
Im ready to get this car on the road.

farberio

iTrader: (7)

Unless you have a way to control bigger injectors stick with 550s

Rotary Ronin

as in something like a stand alone?

farberio

iTrader: (7)

Standalone or an Rtek.

Rotary Ronin

ok, thank you very much!

arghx

iTrader: (3)

stuck injector is near the bottom of the list of things that could be killing your idle. first thing i would check is a vacuum leak.

Rotary Ronin

i will definately check for a vacuum leak first thing tomorrow morning. the car does idle fine when its idleing high from being cold, but once it warms up the idle drops and the car kills, it can be kept alive by tapping the pedal, it also drives and boosts pretty normal. Does it still sound like a vacuum leak? i hope so cause that would save me alot of money.

namelesspenguin

iTrader: (1)

tps maybe

Rotary Ronin

I forgot to mention that also the car sometimes will just spin over and not start like its flooded and the only way to get it to start is to hold the throttle wide open.

OutCold

well whatever u do dont sit and pump the gas while trying too fire up. Holding it like you do is the only right way in your case.

Rotary Ronin

well i checked for a vacuum leak today, found two culprits, one being the old connection for a boost guage, the other was a hose split on the end at a plastic t-connection. sadley it ran the same, when you first start the car it idles high then once it drops to normal operating temperature it stays alive, but when you drive and you push in the clutch and let the idle drop all the way it kills. then it appears that the motor is flooded because it just doesnt want to start after that for a while. so im really starting to lean for new injectors, what do you all think?

Rotary Ronin

I tried this...
Ok this worked for me, I found it in another topic, it started, now I am thinking I need injectors, what brand is recommended, also can someone post a link? Also is it high impedance or low impedance? (91 turboII)

Hello Roto

you can send the injectors your car has to witchhunter.com they can clean and flow test the ones you got for like $70.

There is a tab on the injector to locate the elect plug. On low impedence injectors the tab is in the middle. On high impedence injectors it's offset to one side i.e not in the middle.

Rotary Ronin

Thank you very much for the help ^^

Rotary Ronin

Also where is a good place to purchase intake manifold gaskets for when i go to pull the injectors? if i could get them from napa or autozone that would be great.

Rotary Ronin

I went ahead and bought some new RC fuel injectors 550 (primary and secondary) we changed some easy to get to vacuum lines, found one that wasn't connected, reconnected it. car still runs the same, except, when i start it now it revs up high then dies...unless i tap the gas before it dies then it does its normal warm up idle, drops down to normal idle and idles for a while then dies. Then it will not restart without holding the throttle to the floor. I still need more help please.