91 civic question

[Gasoline Fumes]

The 4-speed '88-'91 Civic is the STD model. Should be a D15B1 engine instead of the DX D15B2. Different camshaft and ECU, and slight TBI difference. I've seen them with a close-coupled catalytic converter, but I've heard that all years might not have it. It has about 20 HP less than a DX.

First through fourth gears are the same as the CRX HF, but it has the DX final drive. So it'll rev slightly higher than a DX in top gear, but there will be slightly less friction with only four gears in the transmission.

STD:
Compare Old and New MPG Estimates

DX:
Compare Old and New MPG Estimates

[sneak7377]

let me end the confusion here:

the 88-91 civic hatch came in 3 trims:

STD:

• no rear emblem
  engine: D15b1
  4 speed tranny
  no rear wiper
  no power steering

DX:

• 'DX' rear emblem
  rear cargo shelf
  rear wiper
  engine: d15b2
  4 speed or 5 speed tranny, this depended on the year, it did for a fact come with either.
  optional power steering

SI:

• 'SI' rear emblem
  rear wiper
  rear cargo shelf
  engine: d16a6
  5 speed tranny
  optional power steering

i can kind of relate to the confusion, my civic hatch is a STD model, but the PO swapped in a d15b2 sometime in it's life, aswell as converted it to automatic, and adding power steering. running the vin says its a 4 speed STD model though.

[ratherbehiking]

thanks for all the replies everyone. Sneak it must be a the standard model I have that has a DX rear hatch on it because I have a DX emblem and a rear wiper, but no controls for it.

[wagonef8]

The STD civic has smaller spline on outer Cvs axle like the HF CR-X

Plether interior
No rear security screen
no clock
No foot rest by the clutch