Individually Disabling Injectors?

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Feb 19, 2019 | 12:29 AM

Project_Daily

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Staging Lane

Joined: Feb 2019

Posts: 79

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From: Houston, Texas

Individually Disabling Injectors?

Hey guys, this is my first actual forum post other than a greeting and I've got a doozy. I just replaced the plugs im my 94 Firebird Formula with the recommended NGK TR55s, and now have an intermittent, fairly violent backfire from the exhaust at idle. To boot, I think the backfire killed my header gasket as I can now hear what sounds like an exhaust leak from the passenger side. I went over all the plugs and couldn't find anything obviously wrong. Now my question is, is there any way to disable the injectors cylinder by cylinder without disassembling the fuel rails each time? I'm thinking if I can isolate the backfire to a specific cylinder it will be much easier to solve.

Feb 19, 2019 | 06:19 AM

80/TA/LT1

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Just unplug them one at a time

Feb 19, 2019 | 08:22 AM

dirtybob

Staging Lane

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eehack software has this (disable injector x) feature as well

Feb 19, 2019 | 11:29 AM

Project_Daily

Thread Starter

Staging Lane

Joined: Feb 2019

Posts: 79

Likes: 5

From: Houston, Texas

Quote:

Originally Posted by 80/TA/LT1

Just unplug them one at a time

That was my first thought, but it looked to me that there were metal retainers that kept the plug end attached unless the fuel rail wasn't sitting on top of it

Feb 19, 2019 | 01:41 PM

dirtybob

Staging Lane

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The clip to release the electrical connector is just a push spring. There are also clips holing the inj. to rail which you would not need to touch.

Feb 19, 2019 | 08:35 PM

Project_Daily

Thread Starter

Staging Lane

Joined: Feb 2019

Posts: 79

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From: Houston, Texas

Quote:

Originally Posted by dirtybob

eehack software has this (disable injector x) feature as well

This is exactly what I was looking for. Thanks a lot!

Feb 19, 2019 | 08:50 PM

shbox

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From: Little Rock, AR

You just push in (pinch) the connector and pull it off.

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Feb 20, 2019 | 02:32 PM

Purple Poncho

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Careful with those metal clips as you pinch them. I've launched and lost a few over the years. They go flying if you don't squeeze and hold carefully.