1991 Nissan 300ZX "vacum hoses keep blowing back" Questions

vacum when held at 2000 rpm and that was good what mite cause the light to come on It could simply be that the EGR valve is clogged. You could try doing a Seafoam treatment on the vacuum system to see

...keep the check engine light from coming back on? the valve seldom fails. The lines that are connected to it fill with carbon and the valve opens and flow of exhaust doesn't happen. The senser is in ...

...blowing out and no power No power EGR valve blow-out can be caused by a clogged catalytic converter. A clogged cat. converter will cause pressure to back up in the engine. A test to perform is remove ...

...vacum systems (its all ok), all wiring systems (its ok too). And the problem still remains. 10 mechanics have checked and tried to repair my car already - and they all failed. The dtc P1403 stil ...

...hoses should blow though easy and the motor it's self should blow through some. The stepper moter isn't in stock at my parts house so I think that it doesn't fail very often and you have some other ...