Description
Factory Ferrari 400i Workshop Manual (1979-1985)
The definitive factory-level service reference for US-market and worldwide Ferrari 400i grand tourers, covering every production variant built between 1979 and 1985 with step-by-step procedures and full electrical diagrams.
Powertrain & Drive Coverage
| Component | Variants Covered |
|---|---|
| Petrol | 4.8L F101 V12 with Bosch K-Jetronic fuel injection (~310 hp) |
| Diesel | N/A |
| Transmissions | 5-speed manual; GM Turbo-Hydramatic 400 3-speed automatic |
| Drive | RWD |
| Model Years | 1979-1985 |
| Badge Twins | Ferrari 400 GT i, Ferrari 400 automatic i |
Common 400i Repairs Covered
| System | Procedures |
|---|---|
| Bosch K-Jetronic Fuel Injection | Fuel distributor calibration, warm-up regulator replacement, injector flow testing and cleaning |
| Cooling System | Thermostat replacement, radiator flush, coolant hose inspection and renewal on F101 V12 |
| GM Turbo-Hydramatic 400 Automatic | Fluid and filter service, shift linkage adjustment, valve body removal and overhaul |
| Electrical System | Ignition system diagnosis, wiring harness inspection, dashboard instrumentation and power window circuit tracing |
Format & Delivery
PDF. Instant download; lifetime re-downloads.
Frequently Asked Questions
Why does my 400i suffer from rough idle and poor fuel delivery?
The Bosch K-Jetronic continuous-injection system on the F101 V12 is sensitive to a worn fuel distributor and a failing warm-up regulator. Over time, the control pressure drops, causing uneven fuel distribution across all 12 injectors. This manual covers complete K-Jetronic diagnostics, control pressure testing, and injector replacement procedures to restore smooth idle and throttle response.
How does the 400i relate to the Ferrari 400 GT and the later 412?
The 400i is the fuel-injected evolution of the carbureted 400 GT. Ferrari introduced Bosch K-Jetronic injection in 1979 to meet tightening emissions standards, renaming the car 400i. The same Pininfarina-designed platform continued into the 412 (1985-1989), which gained a larger 4.9L engine. This manual covers the 400i production run from 1979 through 1985, encompassing all F101-engined 400i variants.
Are wiring diagrams included for US-specification cars?
Yes. The manual contains detailed circuit diagrams for the ignition system, K-Jetronic fuel injection electronics, lighting, climate control, dashboard instrumentation, and power windows. Wire colors, connector locations, and component identifiers are clearly shown. Coverage includes both European and US-specification electrical configurations where differences exist.
What format is the manual?
This manual is a fully searchable PDF file. After purchase, the download link is available immediately. You can open it on any Windows, Mac, Linux, iOS, or Android device with a standard PDF reader, and print individual pages or entire sections as needed for shop use.
Reviews
There are no reviews yet.