Wife bought a 91 sedan a while back with a dohc zc just replaced timing belt idles good drives good except for there's a slight jerk in 1st around 1500 happens for a split second. If you ease into the gas slowly doesn't seem to be there any ideas?

 

is it an auto or stick?

 

Could be the IACV or FITV. Could also be a dirty fuel filter. One last suggestion, could just be because its first gear which tends to be jerky at low speed.

 

It's 5 speed someone had said maybe it's a tooth off but it idles and drives better with new belt

 

Sorry what's the fitv

 

I would look at the distributor cap see if any moisture in there

 

The FITV is the fast idle thermo valve. It should be located on the underside of the throttle body. Does your car have any weird idling problems?

Did you check the fuel filter?

 

No weird idle problems at all seems to idle better now then before I have not checked the fuel filter yet

 

Still same issue changed fuel filter cleaned fitv still jerk around 1500 rpms

 

Could be a timing issue then.

 

As in to advanced or retarded?

 

It would be retarded. You could also inspect your spark plugs. Is your cap and rotor in good shape?

 

Just replaced plugs cause I thought that was issue cap and rotor look good as well

 

I'll double check timing again line up first notch on pulley with the little v correct?