Quote:
Originally Posted by pawoSD
Ok I read this thread....and I saw that Brian mentioned adjusting the vacuum valve on the injection pump to have higher idle vacuum...how does one do this?
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X 2!!
Quote:
Originally Posted by pawoSD
Also, yesterday I put the mityvac on the line leading into that valve (the trans valve on the IP) and it leaks down really fast in the idle position, I pumped the mityvac as fast as I could and could only reach 12-13"...and as soon as I stopped it quickly leaked back down....does this mean the valve is faulty/leaky? It does "leak down faster" as you apply throttle...and it does it a linear fashion as you increase the throttle position....its just that at idle it leaks down too easily...is this normal? I read you should see 20" on that line at idle....
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There is a linkage going to said valve, take the linkage off and push the lever on the valve all the way down, all the way one way should give you more like 20" and the other way the valve will hold close to or no vacuum at all. If that checks out OK then the valve is good. What appears to be your problem is the vacuum valve on top of the valve cover, usually the little lever will wear off and not supply enough vacuum to the valve on the IP. You can make up for that valve by shortening the linkage going to the VCV on the injection pump so that it will supply 20 inches at idle.
Quote:
Originally Posted by pawoSD
I checked my modulator for vacuum and it will hold 25" rock steady...no leaks. Could it still need replacement or is it ok?
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Your modulator sounds fine.