Vac leaks checking with Easy start or so?
Thread Starter
Racer
Joined: Oct 2005
Posts: 405
Likes: 0
From: 1984 crossfire, Alhaurin de la Torre Malaga, Spain
Vac leaks checking with Easy start or so?
I did read quite a few times that you can find a vac leak with a spray can Easy start or propane. So I tried, without any result. Than I liked to know what effect it was I was looking for and sprayed in the TB, No change in Idle RPM 
I tried to spray in the IAC passages, No noticable effect either
If that has no effect, how can I find a leak with this method?
Does it only work when the A/F mixture is lean?
I tried to spray in the IAC passages, No noticable effect either If that has no effect, how can I find a leak with this method?
Does it only work when the A/F mixture is lean?
Thread Starter
Racer
Joined: Oct 2005
Posts: 405
Likes: 0
From: 1984 crossfire, Alhaurin de la Torre Malaga, Spain
If you only get a slight increase when spraying directly into the TB, I wonder if you ever find a small leak.
My RPM did not change sufficient to be noticable
My RPM did not change sufficient to be noticable
Thread Starter
Racer
Joined: Oct 2005
Posts: 405
Likes: 0
From: 1984 crossfire, Alhaurin de la Torre Malaga, Spain
I never have heard of that, but may be a good idea. A material that generates a good smoke when burned without screwing up your cat.
If you ever run into a good method, I appreciate it when yo post me, The Propane methode doesn´t work for me. I will do the same.
If you ever run into a good method, I appreciate it when yo post me, The Propane methode doesn´t work for me. I will do the same.
Safety Car
Joined: Mar 2005
Posts: 4,723
Likes: 11
From: Winnipeg Manitoba, Canada
I have these smoke sticks that when squeezed spray out a very black smoke. I tried it once but its very hard to use because when the engine is running the smoke gets blown around everywhere. Very hard to tell if there is a vacuum leak.
Le Mans Master
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
The one thing I'll say is checking for vac. leaks is not for the impatient.
It really takes time..and should be done slowly.Plus, you should actually check that all the plastics are actually still plugged in, I found one I could swear was good looking at it..but no, it was cracked right where it plugged in.WD40 is just to messy for me, I rely on propane...but what I've found is I can no longer rely on my hearing, so I have the wifey watch the tach for jumps while I check the lines.
I really do want to do the smoke test...but I'm sure it's a very slow process too, and I'd think you'd want the smoke as close to the vac. lines as possible...I think the theory is you should actually be able to see the smoke get sucked in.
It really takes time..and should be done slowly.Plus, you should actually check that all the plastics are actually still plugged in, I found one I could swear was good looking at it..but no, it was cracked right where it plugged in.WD40 is just to messy for me, I rely on propane...but what I've found is I can no longer rely on my hearing, so I have the wifey watch the tach for jumps while I check the lines.
I really do want to do the smoke test...but I'm sure it's a very slow process too, and I'd think you'd want the smoke as close to the vac. lines as possible...I think the theory is you should actually be able to see the smoke get sucked in.
Thread Starter
Racer
Joined: Oct 2005
Posts: 405
Likes: 0
From: 1984 crossfire, Alhaurin de la Torre Malaga, Spain
I don´t have these smoke sticks available here in Spain, so tried the propane. My problem is, even when sprayed into the TB, the RPM doesn´t go up more than standard variation I hear I really cant hear the presence of Propane in the TB. So it is impossible to decide if a very small RPM variation is due to the bad Idle or due to the propane. When I had a perfect smooth idle, I guess I didn´t have to look for vacuum leaks.
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