ballmead

I have an EB 4 speed auto and after doing the CFI to MPI conversion I have had some problems with the air conditioner vents closing when the engine is under load and a vacuum noise (hiss) coming from the air con temperature slider knob when set to full cool position. I also have a question about the air con vacuum hoses. Can someone tell me where the vacuum hoses connect up to. The are 2 black and one green vacuum lines coming out of the firewall and into the engine bay.Help please.

ballmead

Can someone please look under the bonnet of their 3.9 MPI and tell me where the two black and 1 green air con. vacuum lines go, pretty please? :)

zxander

i had the same problem when i had the CFI engine, hissing sound and the vents directing to windows when you plant your foot. all i did was take the climate control box (next to the instruments) thing out and played around with the vacuum hoses until it stopped making the noise. i think i just plugged up one of the vacuum hoses with blu-tack on the right side of it... can't remember which. fixed it right up and worked perfectly ever since. :)