Fuel Injector guru's, need your help!!!
Thread Starter
Melting Slicks
Joined: May 2002
Posts: 3,424
Likes: 1
From: Tucson Az
St. Jude Contributor
Fuel Injector guru's, need your help!!!
My '92 LT1 has the warm weather blues again... As usual.
My question to the pro's is:
Can an injector(s) malfunction after reaching operating temp or above, say 220 degrees, and not have any issues when cold? If so, can they be heated (after removal) and tested?
I'll be checking the oil later today for evidence of fuel in the pan.
TIA
My question to the pro's is:
Can an injector(s) malfunction after reaching operating temp or above, say 220 degrees, and not have any issues when cold? If so, can they be heated (after removal) and tested?
I'll be checking the oil later today for evidence of fuel in the pan.
TIA
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Sure - check resistance across the coils hot and cold - no need to remove them, just warm up the engine. Specs are 10 ohms or higher - most check out at around 16 or 17 ohms with a little bit of a drop (like an ohm) warmed up. All should be the same, wide variances need to be replaced.
Thread Starter
Melting Slicks
Joined: May 2002
Posts: 3,424
Likes: 1
From: Tucson Az
St. Jude Contributor
Originally Posted by SunCr
Sure - check resistance across the coils hot and cold - no need to remove them, just warm up the engine. Specs are 10 ohms or higher - most check out at around 16 or 17 ohms with a little bit of a drop (like an ohm) warmed up. All should be the same, wide variances need to be replaced.
Good tip!!
Le Mans Master
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
but I'm not sure it has to be a wide variance, mine all ohmed within .5 I've owned it for 7 yrs., I'd say if you found 1 or more 1+ ohms out you've got some problems-and more to follow.Thought I read somewhere they should be within .5 of each other...but the old memory is slippin.
Thread Starter
Melting Slicks
Joined: May 2002
Posts: 3,424
Likes: 1
From: Tucson Az
St. Jude Contributor
Originally Posted by bogus
hm... do you have access to a scanner? something to see what the various sensers are doing?
Can an injector be bad ONLY when heated up?
Le Mans Master
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
Isn't that the same question, that's why you ohm them hot and cold.Answer...sure! If you'd like to see the results of a injectors testing bad..look at 87 Rag s last post by myself and mudslides problem.
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