GSL-SE "misfire"
#1
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Join Date: Mar 2013
Location: Portland, OR
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GSL-SE "misfire"
My 1985 GSL-SE with an original 13B has a slight "misfire". I don't actually think it is a true misfire because I've already replaced the spark plugs, cables, cap, and rotor and that didn't make a difference. It has the intermitten, not-quite-predictable rumbling like if I push in the TPS without actually changing the throttle plate position. The idle moves ever so slightly between 800-850RPM. The car runs fine, there isn't really any sign of misfire above 2000RPMs, and I've already done a TPS adjustment. Just every second or so (it's not perfectly even), there is a slight "misfire" at 800RPMs (idle). When I drive it, there is no sign that anything is wrong with the car: no unusual surges or anything anywhere even up to ~6000RPM. Seems to be strictly an idle issue.
Are there any other low-effort things I could check at all?? Thank you!!
Are there any other low-effort things I could check at all?? Thank you!!
#6
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Join Date: May 2013
Location: Long island
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look at all your vacuum lines and see if they look broken, brittle, cracked or are super hard which usually crack easily. if you have a vacuum leak and you spray carb cleaner, it will cause the car to hesitate. I use a smoke machine and smoke the entire system. if i see smoke leaking i found the problem. it comes in real handy.