vacuum

patman

... spark plug was bad, if misfire moves to cylinder #5 then plug wire is bad, if misfire stays on #7 then suspect #7 coil pack or fuel injector, a vacuum leak at intake manifold gasket around cylinder #7 or (god forbid) a mechanical issue with that cylinder. ⋅ Cleared codes and test drove ...

gmcultr

Very possible 38. When you pull your vlines to check for gas check for cracks...

I once replaced a vacuum line with small flexible plumbing line from home depot... it got me to the partstore like a champ.

SilveradoSierra.com

Callahan

I haven't replaced any vacuum lines. And moisture under the cap makes sense because there was a massive storm that went through that day. How would i get the cap off without messing everything up?

gmcultr

gmcultr wrote:It has a map sensor.. iirc.

Uh I gotta read better.

Check for moisture in the cap if its rained or been really humid lately. And maybe a vacuum leak. Do you still have the old hard lines or have you replaced with soft lines?

Dont know if you saw these edits I made lol

gmcultr

It has a map sensor.. iirc.

Uh I gotta read better.

Check for moisture in the cap if its rained or been really humid lately. And maybe a vacuum leak. Do you still have the old hard lines or have you replaced with soft lines?

rodcheapo

You disconnect the vacuum line running to the brake boost in the back right of the engine bay. Big son-of-a-b*tch on a truck, can't miss it.

adamant

What vacuum line do you disconnect you add seafoam

country1911

When you say no major vacuum leaks, are there any? A small vacuum leak can cause a random misfire and it can be intermittent. I had one on my 02 that would only throw misfires intermittently when cold.

Also your fuel pressure seems low to me.

Russell1989

... brakes sometimes 20 or less. It's been happening for two weeks. And about a month and a half I changed the radiator. They said something about a vacuum hose but to be honest how would I solve that issue if it was a vacuum hose?

lilmagoo1

thats what im going to do 1/3 in the crankcase, 1/3 down the vacuum line and 1/3 down the fuel tank...ok so you shoudlnt stall it out then correct? and when you poured 1/3 of the container shut it off for at least 5 mintues?

Found 854 matches: vacuum

P0307 Cyl #7 Misfire, P0505 High Idle, P0404 EGR Valve

Re: Educated Guesses Needed

Re: Educated Guesses Needed

Re: Educated Guesses Needed

Re: Educated Guesses Needed

Re: Sea Foam

Re: Sea Foam

Re: P0300 help!

Re: Drop in oil pressure when applying brakes

Re: Correct line to use seafoam??

More Results