okay guys i have been dealing with a hard start problem ever since the temperature warmed up. I have played with some of the settings to no avail. She runs fine and strong once she starts, but sometimes i have to crank a couple of times when "cold" 15-20*C and 3-5 times when at operating temps 80-90*C.

I've played with my startup injector timing(changing by a couple of milliseconds in both directions), adjusted the TPS, IAC, and idle, but still no dice.

I am running a single turbo setup, so most of the sensors are gone, secondar throttle plates are removed. I checked for vaccuum leaks where i could.

Please, give me some advice. Thanks, Josh

 

(1) Make sure you throttle is totally closing when you let off the throttle.
You may have to adjust the dash pot and/or throttle linkage.
Make sure that when you are at fully closed throttle, that the secondary throttle is also fully closed.

(2) Get the engine completely 100% warmed up and everthing heat soaked.

(3) Make sure the cold start fast idle cam is disengaged. It should disengage around 140F. Adjust if needed.

(3) Make "ALL" of your hot engine idle adjustments to insure the engine idles as best as posible for all three idle speeds, and that when you stop after driving, that the revs settle down as they should. You might have to adjust the air bleed screw for this.

(4) In the morning when every part of the engine is cold:
(a) is the cold start system engaging properly in order to increase cold start revs?
(b) Start car and adjust the Water Temperature Correction Table left column for best cold idle. Set the right column value for 5% more than the left side.

 

Hey Josh, way back when I had that engine it started doing something similar and it turned out to be the water temp sensor for the ECU. The sensor went bad and it wasnt going in and out of cold start mode as it should. So before I went and messed with too much on the PFC I would check that. Just make sure you test the correct temp sensor because there is a diff one for the gauge than the ECU. You need the large one that is on the water pump housing.

 

thanks for the advice guys. i will check that stuff out.