Injectors are not grounding.. where in the pcm do they ground from?

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Mar 3, 2008 | 07:00 PM

#21

jay_lt4

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From: wisconsin

computer will be shipped back to you in the morning, at least you can rule out vats and i tested it on another ls1 swap vehicle and it fired right up so you know the pcm is good.

Mar 4, 2008 | 12:12 PM

#22

95GreenZ28

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Excellent! Thanks Jay.

Mar 6, 2008 | 11:28 AM

#23

95GreenZ28

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Hey Jay I got the pcm. Thanks again man! Still doesnt work. I am gonna go get a noid light today and check that and if all is good then I know it is my injectors

Mar 6, 2008 | 12:11 PM

#24

jay_lt4

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From: wisconsin

that is the next step, you should be able to get a noid light set from any local parts store like autozone

Mar 6, 2008 | 01:13 PM

#25

95GreenZ28

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Yea I will head by there tonight. I hope the noid light shows pulse so that way I know it is my injectors

Mar 7, 2008 | 01:58 PM

#26

jay_lt4

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what did ya find?

Mar 8, 2008 | 05:44 PM

#27

95GreenZ28

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Ok got a noid light and they work great. So i am guessing either bad injectors or clogged injectors. Who can clean them or test them?

Mar 8, 2008 | 07:57 PM

#28

LS1MCSS

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http://www.rceng.com/Fuel-Injector-Cleaning-P43C0.aspx

Mar 8, 2008 | 09:26 PM

#29

95GreenZ28

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Wow thats expensive. Thanks though man

Mar 8, 2008 | 10:02 PM

#30

poolshark021

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This may be a dumb question but have you checked fuel pressure to make sure the pump is running? The injectors may be firing but is any fuel even getting to them?

Mar 9, 2008 | 11:33 AM

#31

95GreenZ28

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Fuel is to the rails with correct pressure yes

Mar 9, 2008 | 11:52 AM

#32

LS1MCSS

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Quote:

Originally Posted by 95GreenZ28

Wow thats expensive. Thanks though man

It's a little expensive but still a lot cheaper than new, or even most used, injectors and you know they are right when they come back.

Mar 9, 2008 | 12:10 PM

#33

95GreenZ28

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From: Amarillo, Texas

Thats true but I cant spend that much on stock injectors. I can get a good set of 30#s for that. I just ordered a stock set fresh out of a running ls1 so hopefully they will work

Mar 9, 2008 | 07:51 PM

#34

edcmat-l1

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Quote:

Originally Posted by 95GreenZ28

Ok got a noid light and they work great. So i am guessing either bad injectors or clogged injectors. Who can clean them or test them?

I thought you said you had them cleaned? Tap on them with a brass punch and hammer.

Mar 9, 2008 | 07:51 PM

#35

95GreenZ28

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I had two sets and I accidentally sold my cleaned set and kept these

Mar 9, 2008 | 07:52 PM

#36

95GreenZ28

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tap on them where?

Mar 9, 2008 | 07:53 PM

#37

edcmat-l1

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Quote:

Originally Posted by 95GreenZ28

Does anyone know? i did a ls1 swap into my 95 and everything works great except I cant get the injectors to open up. They were cleaned when I bought them as well. I though it might be the vats but it wasnt. What wire from the pcm grounds the injectors? Anyone know? Thanks in advance

Quote:

Originally Posted by edcmat-l1

I would check with a "noid" light. I have seen many times, after cleaning injectors, them not opening. I think its from the pintle and seat being so clean they kind of jam together. I seen it many times. If this is the case, the easiest thing to do is to buzz the injectors with a buzz box and tap on them with a brass punch and hammer.
First thing you have to determine though is if indeed you do or do not have an injector "pulse".

Just in case you need a refresher..................