SOURCE: does the injectors throtle body stay hot or do
they are always hot, they are switched by the negative side (the ground turns on and off to pulse the injector)
SOURCE: I have a 93 trooper with 3.2l soc. it looses power
Attain a vacuum gauge and check the vacuum pressure at the intake manifold, it should reading steady needle at 18 lbs. of vacuum if not there is a vacuum leaking, if it reads 18 and the needle is shaking it may be a valve issue, most vacuum gauges come with a chart that shows the diagnostic procedures for use with vacuum gauges they are an invaluable tool for mechanical diagnosis and they can also tell you if your timing is off.
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