Fuel pressure and evap solenoid ???s

jelliott510 · Post by **jelliott510** » Wed Jun 23, 2010 2:24 pm

I am working on the wiring for my car and noticed in the wiring section that the solenoids are crossed off. Do you guys not use them? I was going to use them in my car, but it would look alot cleaner without them. Is there a problem with check engine lights or driveability with out the feul pressure solenoid?
What do you guy do?
Any thoughts?
My ecu and wiring is 1990.

jeffball610 · Post by **jeffball610** » Sun Jun 27, 2010 5:04 pm

Solenoids are not necessary. I have also removed the FIAV wiring from my project as it is of no use. Most of these were attempts at being emissions compliant I think.

I'm also working on making a new wiring diagram for everyone. I have had a long road in getting my wiring sorted, so I thought I would try and make it a little easier on everyone else. Let's see how long it takes me to get this thing done.

4g63mightymax · Post by **4g63mightymax** » Thu Jul 01, 2010 6:06 pm

Jeff is right. You can remove the two solenoids and their associated wiring. Not having them will not cause a CEL. I have been driving my 4G63 powered truck for ~ 4 years now without them, and I even legitimately passed multiple Massachusetts (read: tough) emissions tests without them.

-Jeremy

jelliott510 · Post by **jelliott510** » Sat Jul 03, 2010 6:13 pm

I was just worried that it might be to rich at idle. Any ideas?