Civic VX Throttle Body trouble. Used replacement is also BAD. Any way to fix?
Throttle body on my 92 Civic VX is causing the car to rev up and down at idle (800-1200 rpm). I know it's the throttle body because I also have a 94 Civic. Swapping throttle bodies made the 94 Civic idle poorly and fixed the idle on the 92 civic. I checked that it's not the MAP sensor by swapping MAP sensors.
I ordered a used throttle body from A and A Auto Truck Salvage USA-KS(Wichita) 1-800-566-9572 a couple months ago . I'd advise against dealing with this guys - very rude and just plain bad at delivering anything but excuses. This guys at A and A Auto Truck Salvage send out a wrong part and after a months and 20 or so phone calls and hearing just as many excuses I never got the correct replacement. Last time I called they claimed they never took my order! Now I got a refund, but only for the part, they did not refund the shipping WTF. Worst experience.
So this week I ordered a throttle body from another place and got it delivered yesterday. I cleaned it up with mineral spirits and put that TB in. This replacement TB it's also causing rough idle. Is it bad?
Any way to fix the throttle body it? At this point I'd rather try and fix it, as a new replacement is ~$500 and I'm tired of dealing with junk yards.
I heard that the throttle shaft could cause vacuum leak - is there a gasket that could be replaced? Anything else that could go wrong with it?
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