YGWDNFRE

So i have a 04 v6 mustang and i just tore apart the intake manifold and rebuilt my fuel injectors and put them in and put everything back together my car was surging before i tore it apart and now after its put back together are there any ideas as to what this could be theres no check engine light to tell me any codes wondering if any one else has had this problem

96t-bird

why did you remove the intake ? also what happen to the injectors? did you check all the vaccum lines before doing the intake? how about the IAC. when you state surging. when does it happen?

YGWDNFRE

my intake was completely gummed up and my butterflies could hardly move and i rebuilt my injectors thinking they were clogged and thats what could have caused the surging but now that they are rebuilt and put back and everything put back together i test drove it today and found the surge to be a much harder surge then before

YGWDNFRE

rough idle but dont see movement in the rpm guage only surging under power

zinda

I agree 100% that it's a vacuum problem my '02 had a 4 inch long crack on the bottom side of the main vacuum line, only reason I found it was I read some service bulletins that were for a 4.6 van that said to put clams on the hose connections. While I was doing this I felt the hose and turned it over to see that crack which was not showing up on my check engine codes nor was my scan tool showing anything wrong.

zinda

clams=clamps

zinda

clams are way to hard to keep in place, plus it's hard to find the ones that are trained to hold hoses in place on your engine.

Daehawk

Plus they take only so much heat before they collapse completely.