Replaced EGR valve now it won't start!
I need help! My oil pressure switch was screwing up, so I went and got a new one, and my idle has been rough for awhile, so I decided to replace the EGR valve, while I was back there. I replaced both with no issues, but now it won't start. It is turning over, but seems like it's not getting gas. I didn't think it would be the EGR but I cleaned the old one, and put it back on, with no luck. The only thing that is different when I turn the car on, is the oil pressure shows as maxed out on the dash (digital dash), when I turn the car on. This happens whether the oil pressure switch is hooked up or not. I diconnected the pressure switch, and it still didn't start. Any ideas?
My Blazer is an '89 4x4 with the 4.3liter, TBI. |
Did you remove the tbi body to replace the egr? as its the easiest way. One thing i always forget to plug back up is the darn wires to the injectors since they are pushed out of the way.
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No. I didn't. Or unplug any wires, besides the oil pressure switch. That's what's baffles me.
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So I figured it out. The Oil Pressure switch, and the Fuel pump are on the same circuit, and the ECM B fuse was blown. Now, my battery is dying. I just bought a new one yesterday, and is dead this morning. Time to trouble shoot again, but at least it runs, may have to disconnect the battery at night, until I figure out what's up.
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Yea the oil switch and fuel pump work together in a way. Gm build somewhat of a safety feature with it. If it detects no oil pressure through the switch the fuel pump cuts off. to save the engine from running with no pressure.
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