View Full Version : SR20DET Hard start when warm

07-14-2005, 11:46 PM
My car starts great in the morning or any other time that it has been sitting for hours. Otherwise it cranks for about a minute then fires up, with my the throttle plate open. I have a bad iacv. The engine idles great with it unplugged. I have cleaned as suggested in a thread with Castrol super clean, no change. It is getting power. Fuel pressure is not raising past 55 psi, when at 15psi overboost. Boost quickly falls back to 10psi. Idle fp is 35 psi. I have tried clamping the return line, with the vacuum hose hooked up, it went to 55. I will try tomorrow, with no hose hooked up. This is my 2nd Walbro 255 in 5,000kms. Mostly half tank or less has been run, the last 3 years.This problem just surfaced this year, prior to 2005 there was no problem starting.

07-16-2005, 11:16 AM
I had a similar problem. Can you please share what happens when you try to start the car when its warm? Any noises or what not?