Need Help
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Cruising
Joined: Nov 2010
Posts: 13
Likes: 0
Need Help
I ran into a resent problem a few days after going for a ride and parking my 90 L98 coupe in the garage, went to take it out and it cranked but would not start. Keep in mind I totally restored this car and know it in and out. I had spark so checked fuel pressure and found it would come up to 20# on the 2 sec prime and then drops to zero. Changed the inline filter, pump, pump filter and pulsater, same problem. Next did the return line pinch off test and had pressure, changed the fpr, same problem. This is what I found if I unplug all the injector connecters (also new) on the right side the pressure comes up to 40# and holds. The pressure drop is because the injectors are spraying on that side, ECM? I did check for a ground short but that looked good. Anyone have any ideas?
Last edited by c4PLASTIC; Oct 7, 2011 at 09:51 AM.
Drifting
Joined: Dec 2007
Posts: 1,647
Likes: 4
From: Argillite KY
Wow, you've just about covered it. Are the injectors spraying with the engine off and the key on? It does sound like a shorted ground wire. Have you tried to locate the ground wire at the pcm? You may need to disconnect it there and see if they're still spraying. I can't think of any inputs that would make one side spray so if it's not a ground it's almost got to be the ECM. Never heerd of such a thing. Keep us posted.
