Plenum Pull Advice, Starter Rebuild, MAP Sensor Info

[Paul Workman]

Originally Posted by mgbrv8

Okay first off It's been a while since I was able to touch my Zr1 project. What happened was I got everything buttoned back up But once I started it I noticed a miss Using my stethoscope i pinpointed which primary injector was stuck Despite tapping I could not get the stuck injector loose. Needless to say I had to pull the Plenum back off again. Once I had the Plenum off I tested all my injectors with a 9 V battery. Only to find that four of the secondaries were stuck. Once they were all free I energized the fuel pump circuit Via The fuel pump pigtail that hangs off the main harness from the ECM. Once the fuel system was energized I then found that I had six secondary And two primary injectors Leaking. So the lesson here is if you ever do a injector Replacement or anything in the valley Make sure to test your injectors before putting the Plenum back on. Now my injectors were rebuilt by a company that a number of people Have used on this forum. Before I go naming names or pointing fingers I want to talk to them on Monday.

Dave

Dave,

If it is who we think it is, their reputation is to make it right. However, you might be interested to know that your situation is not unheard of with "rebuilt" injectors. Even if the bad ones were to be replaced at no charge, you still have experienced what has happened a number of times before (with rebuilt - or NOS injectors too, come to think of it). But, the choice to go cheap and roll the dice (16 times) on "rebuilt" injectors and not come up "snake eyes" is the buyer's choice...and too possibly another set of gaskets to go with the additional plenum pull So, I believe the consensus on the forum is to go with their new stainless injectors once and be done with 'em!

This may not amount to anything, but I noticed you used a 9v battery to actuate the injectors. That is the first time I heard of using a 9V battery to test the injectors, so I'd be at a loss to say whether or not that in itself could be an issue if one or more failed to function. (I used a jumper directly off the pos of the 12v battery to test if they functioned properly (switch ON, fuel rails at pressure). Course, it doesn't matter in the case of a leaking injector - leaking is leaking.

Well, it sounds like you're on the road to repair. Let's hear how it turns out.

P.