Bucking at 1700 - 2100 RPM

wubie317 · Post by **wubie317** » Fri Mar 06, 2015 4:25 pm

Recently, the car has started bucking...surging, lurching, not smooth...at exactly 1700 RPM. It's like riding a bucking bronco until it gets to 2100, then all is fine. All gears.

Where should I start looking for a cause?

azruss · Post by **azruss** » Fri Mar 06, 2015 4:41 pm

I would start with fuel. clean carb, change filter. Also, pull your plugs and see who they look. how do plug wires look. tight on both ends.

124JOE · Post by **124JOE** » Fri Mar 06, 2015 5:06 pm

also pull the cap and inspect it and the rotor

vandor · Post by **vandor** » Sat Mar 07, 2015 12:44 am

Fuel pressure should be checked, not enough fuel often causes bucking on both carbed and FI cars.

So Cal Mark · Post by **So Cal Mark** » Sat Mar 07, 2015 1:38 am

if you post more information about the car you'll get more specific answers

76was124 · Post by **76was124** » Sat Mar 07, 2015 6:51 am

Ditto what Mark said.....what year? Engine? FI or carb etc.

Also, does it happen in that rpm range in all gears?

toplessexpat · Post by **toplessexpat** » Sat Mar 07, 2015 7:10 am

Looks like a '77 - and this ain't its first rodeo (oh I'm laughing at my little joke there....)

http://fiatspider.com/f08/viewtopic.php ... 21#p226421

Bucking at 1700 - 2100 RPM

Bucking at 1700 - 2100 RPM

Re: Bucking at 1700 - 2100 RPM

Re: Bucking at 1700 - 2100 RPM

Re: Bucking at 1700 - 2100 RPM

Re: Bucking at 1700 - 2100 RPM

Re: Bucking at 1700 - 2100 RPM

Re: Bucking at 1700 - 2100 RPM