Author Topic: Coughing intake (Read 14143 times)

NoobKevin · « **on:** November 03, 2019, 07:00:12 pm »

My 86 GT is coughing through the intake when I am cruising at approximately 40 mph. Please say this is not a valve adjustment issue.

GTRS Fiero · « **Reply #1 on:** November 03, 2019, 08:25:31 pm »

"this is not a valve adjustment issue"

Well, what RPM are you running at that speed?

Is this a new development? Did anything precipitate this?

TopNotch · « **Reply #2 on:** November 03, 2019, 08:31:35 pm »

Could be timing, or a fuel problem. A recording of the sound might be helpful.

NoobKevin · « **Reply #3 on:** November 04, 2019, 10:11:29 am »

I want to say rpm’s are around 2000. Everything is a new development for me. I have put only 100 miles on the motor since completing repairs.

GTRS Fiero · « **Reply #4 on:** November 04, 2019, 06:01:24 pm »

Does it sound like a singer sewing machine?

NoobKevin · « **Reply #5 on:** November 10, 2019, 05:44:43 pm »

The noise sounds like a coughing with a doink sound.

Fierofool · « **Reply #6 on:** November 10, 2019, 07:51:52 pm »

Check your plug wire routing again to be sure they're in the correct firing order. Sounds as if it's firing when it's on the intake stroke.

GTRS Fiero · « **Reply #7 on:** November 10, 2019, 08:48:07 pm »

Coughing, yes. "Doink" would seem to be push rods. Something hitting metal.

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