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Old 07-18-2012, 11:50 AM
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Flashing Service Light

My service light comes on and off, more so when I'm below 1500 rpms. Took it to diesel mech, told me no codes but the #8 injector was sticking per computer. It is not actually doing it, just what the comp said. Have done some reading about this, would Rev-x possible fix it? I filled it up with offroad fuel and added additive, so i know its not a fuel issue.
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Old 07-18-2012, 11:58 AM
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If that "mechanic" told you there were No Codes, Find another mechanic!

If the light was On at All, there IS a stored code to tell you why (he must not have the right equipment to retrieve out codes - which Are different from generic OBD-II). Another common misdiagnosis from people who don't know the 7.3 is the #8 injector (which IS different from the other 7....) and good indication you've got the Wrong Guy to work on your truck

Seriously, take it somewhere Else, there's a good chance that guy's a Clown.....

ps. and NO, an additive is Not going to solve the problem
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Old 07-18-2012, 12:14 PM
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He had a toughbook, not a hand held OBD-II. I've read A LOT on here about this per the #8 injector. Should I go ahead and just replace it even though its running fine?
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Old 07-18-2012, 12:33 PM
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Just because he used a laptop doesn't mean he had the right software for our trucks.

Again, IF THE LIGHT CAME ON THERE ARE CODES STORED! Your guy just may not be able to retrieve them (and you'd really be smarter to find someone who is).

Quote:
Originally Posted by Langpie View Post
Should I go ahead and just replace it even though its running fine?
Are you serious??????
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Old 07-18-2012, 12:41 PM
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Actually not all codes will show up after the check engine light goes off. Just like some codes will be there even with out the check engine light ever coming on. All depends on what the code is. But I would still take it to a diesel specific shop to get checked out they'll have the a better idea of what's going on.

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Old 07-18-2012, 12:50 PM
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Mikejones I did... thats all he does... think I should get a second opinion?
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Old 07-18-2012, 12:51 PM
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Quote:
Originally Posted by mikejones96 View Post
Actually not all codes will show up after the check engine light goes off. Just like some codes will be there even with out the check engine light ever coming on. All depends on what the code is. But I would still take it to a diesel specific shop to get checked out they'll have the a better idea of what's going on.
Dude, I don't know where you're getting that from...

The OP is describing his light constantly coming On & Off. He certainly has a code stored. There ARE "soft codes" that get stored, and don't illuminate the light, I agree. That does Not apply here though.

It takes specialized software to retrieve codes from our trucks, that I don't think everybody has. The PCM should get properly scanned, a Buzz Test performed, and the IDM queried to know where to go from here. That's just gonna be step-one. If his current "mechanic" can't get it done and he's unwilling to go elsewhere I don't think I know what else to tell him....
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Old 07-18-2012, 12:55 PM
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umm NoRalPh what are you talking about? where did I say I was "unwilling" to go anywhere else??? try reading
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Old 07-18-2012, 01:06 PM
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I hope you read my statement right,,, I said IF you were unwilling.

You did seem to be trying to qualify his equipment because it was a Tough Book and not a Generic OBD-II scanner. I thought that's what made you believe he was using the right equipment.
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Old 07-18-2012, 06:41 PM
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chances are its either the cps or #8
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