This weekend I installed a Walbaro 255 fuel pump, RTEK 1.7 and RC Engineering 720cc secondaries on my 88 Turbo II. Also battery was relocated to the rear hatch in prep for the FMIC next weekend. Anyway i got everything installed and put back together and it was running great, I noticed the new injector leaking fuel so I pulled the UIM again and replaced both O-Rings. This fixed the fuel leak but now I seem to have an idle issue. I will also note Power steering and AC was deleted as well. Anyway I found a cracked hose going from the UIM to the Turbo outlet, I replaced that and all seemed fine it idled normal again. I went back about an hour later and the same issue popped back up. It idles at about 400-500 rpms and goes up and down. It won't hold a steady, once you get going everything is fine but as soon as you come up to a stop it will want to die out or die out. Any suggestions? TPS, idle, vacuum leak elsewhere?

 

Anyone?

 

I wouldn't attribute it to the new injectors since they aren't even on at idle.

Unless they are leaking pretty bad, which might cause a rich idle. Worth a check

 

Do you mean cracked hose on the turbo INLET? Does the car run/drive fine otherwise? May just need to adjust your idle. Should idle right around 750

 

Also be sure you put the injectors where they needed to be haha. I've seen someone swap in "new secondaries"... right into the primary injector position haha. Not sure how they messed that up though. I'd be embarrassed

 

You have a vacuum leak somewhere.

Once the leak is solved, adjust the TPS as per the instructions in the FSM.