LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

upgraded to 30# injectors, NEED HELP!!

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Old Jun 5, 2004 | 02:50 PM
  #1  
Muskys SS's Avatar
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From: Langley, BC,Canada
upgraded to 30# injectors, NEED HELP!!

I just completed assembling my engine which includes 30# injectors. Is it ok to start the car without tuning in the new injector size??? The current tune is setup for the stock 24#ers
Old Jun 5, 2004 | 02:53 PM
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From: waterford, MI - USA
yeah, I started mine thursday cause I didnt want to wait for my tune to start it. esp. if there's something wrong. that would give me a few more days to correct if there was a problem. anyways, I wouldnt drive it since it will be running rich. mine is only real rich at higher rpms. it doesnt really smoke at all at idle or just off idle. I have started it quite a few times to hear it since I just got done w/the heads/cam/exh. upgrade.
Old Jun 5, 2004 | 02:56 PM
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Yes, its ok to start it up w/ the 30# injectors. Yet, I would not do much driving at all before you get it tuned.
Old Jun 5, 2004 | 03:22 PM
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Muskys SS's Avatar
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great. thanx guys. I just want to start her up to make sure everything is good..
Old Jun 5, 2004 | 03:23 PM
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97 RedSS's Avatar
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Yes, mine ran OK w/o tuning for them..I left it like that for a week...

Cody
Old Jun 5, 2004 | 06:24 PM
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Starting it should be OK, but remember those injectors are 25% bigger than what the pcm thinks they are, so until the O2s warm and begin feedback it will be running very rich, then even once the O2s begin to work the pcm can not adjust the fuel trims enough to correct for that much extra fuel. So it will keep running rich just not as much so. I would not drive it at all you are looking at washing the cylinders down and dumping fuel into the oil, niether of which is a good thing.
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