The engine prototype was first unveiled on 6 October 2000 at the Lotus factory in UK before it debuted in the 2004 Proton Gen•2.

[1] All CamPro engines incorporate drive-by-wire technology (specifically electronic throttle control) for better response,[2] eliminating the need for friction-generating mechanical linkages and cables.

Even though the S4PH engine had contemporary maximum power and torque outputs, its performance was reportedly sluggish in real world driving.

Proton cars use a longer intake manifold to achieve slower air flow; as it was found that promotes better mixing with fuel.

Applications: The CamPro IAFM (Intake Air-Fuel Module) is essentially an original CamPro engine equipped with a variable-length intake manifold, developed under a joint fast track programme that began in April 2005 by EPMB, Bosch and Proton.

However, the IAFM differs from the VIM (Variable Inlet Manifold) for the CamPro CPS engine as follows:[citation needed] The Intake Air-Fuel Module for Proton's CamPro engine debuted in the second-generation Proton Saga, which was launched on 18 January 2008.

[citation needed] With the IAFM, the 1.3L engine used in the Proton Saga now produces 98 bhp (73 kW) @ 6,500rpm.

[11][12] The combination of the new Campro IAFM+ engine with the CVT gearbox results 4% and 10% reduction on fuel consumption for urban and highway driving respectively.

Unlike the IMA (Integrated Motor Assist) technology in the Civic Hybrid that uses a bulky Ni-MH battery pack, the EVE Hybrid system will use a Li-ion battery pack inside the engine bay.

[14] The idea of the production was first revealed by Proton Managing Director Datuk Syed Zainal Abidin on 13 December 2008, due to the new market trend of having small displacement engine but forced-aspirated to produce the power output equivalent to a larger motor, a similar concept as the Volkswagen TSI twincharger technology and the Ford EcoBoost engine.

[17] In 2016, a public recall affecting more than 90,000 CamPro CFE equipped vehicles took place for the oil cooler hose.

[18] Together with the recall, service intervals for oil cooler hose replacement were lowered to every 40,000 kilometres.

[21] However, older models like the Exora, Prevé and Suprima S will continue to use the old 'CamPro' name until it is eventually retired in favour of the upcoming GDi engines.

The system assesses the driver's throttle input, and a green indicator on the instrument cluster will light up when the car is being driven in an economical manner.