Any number of things could cause your vehicle to surge. You need to take your vehicle to a tune-up shop and have it diagnosed.
If its computer controlled engine, it more than likely a dirty or bad Idle Air Control Valve.
Bad EGR valve
That year don't have a fuel module. You need to check the EGR Valve. that is the most common problem with a surgeing problem. Is the check engine light on ? if it is ,then you need to have the engine scaned with a scanner and go from there.
Clean the MAF sensor with CRC MAF cleaner, do not touch the sensor wires, you'll damage the unit and freah is ~ $175.00
yes
1988-1989 against lakers and 1989-1990 against blazers
Home Again with Bob Vila - 1990 Surge Protection Plumbing Bamboo Blinds and Garden was released on: USA: 10 December 2005
Unfortunately, a 1997 Toyota Supra engine and trans would not fit into a 1990 Mazda Miata. The Supra engine and transmission are unable to be mounted correctly within a Miata to make them fit.
Vacuum leak
It is probably possible, but why would you want to? The B22 is a good engine but no better than a Honda engine. This would require major modifications.
The spark plug gap for a 1990 Ford Taurus 3.0L engine should be set at .044 inches. A 4.2 liter engine would have a gap between .052 and .056 inches.
no. 1986 to 1990 sorry