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3
votes
1answer
106 views

Block Test: Can't suck any more air, is this normal? (1999 Suburban)

I performed a block test recently to diagnose a problem I'm having. The liquid stayed blue, but I want to clarify I have done this right. The purpose of the test was to see if I could prove a head ...
2
votes
0answers
25 views

Is there a way to test ignition coils with built-in ICM?

My car's service manual shows this for the ignition coils: What is the ICM? Related to http://mechanics.stackexchange.com/a/2850/31, is there a way to check the coils to see if they are working ...