SuperSpore
OBS Enthusiast
Hello,
On a 91 c1500 7.4 Tbi - One day it just didn't want to idle. It kept dying. It had a previous miss or rough idle which I had chalked up to a bad plug wire connection, but nothing found.
You have to keep mashing the throttle to keep it on. It has since thrown a 43 code (knock sensor error).
Wondering if there's a simple way to test the egr valve by pulling the vacuum line?
I realize it also might be a bad alternator, but wanted to rule out the other simpler solutions.
thanks
On a 91 c1500 7.4 Tbi - One day it just didn't want to idle. It kept dying. It had a previous miss or rough idle which I had chalked up to a bad plug wire connection, but nothing found.
You have to keep mashing the throttle to keep it on. It has since thrown a 43 code (knock sensor error).
Wondering if there's a simple way to test the egr valve by pulling the vacuum line?
I realize it also might be a bad alternator, but wanted to rule out the other simpler solutions.
thanks
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