Is it possible to replace your carburatot with electronic fuel injector? Same engine

**therp2paz** · February 1st, 2012 11:00 PM

sa toyota corolla 12 valve carburator engine, pede bang palitan ang carburator at isalpak ang fuel injector ng gli? its still the same engine,tatanggalin lng ung carburator at papalitang ng electronic fuel injector..may naka gawa na po ba nun? possible ba? tnx 4 the time.

**uls** · February 1st, 2012 11:08 PM

di lang injector yan

it's not that simple

paano mga sensor? airflow, throttle position etc

and naturally you'll need an ECU

**GTi** · February 1st, 2012 11:39 PM

Hmm~ Mahirap na gawain yan. Tell you what, it'll be simpler to just do a 4EFE/4EFTE or 4AFE/4AGE engine swap.

**vinj** · February 2nd, 2012 09:16 AM

It's easier to switch an EFI system to a carb system than vice versa. And what's the use? A properly tuned 2E engine will already give decent fuel efficiency (10km/L city driving at the least AFAIR).

**airolynx** · February 2nd, 2012 09:26 AM

you will need

an ECU
Throttle Position Sensor
Mass Airflow Sensor
Fuel pump installed in the tank
a set of injectors
a new throttle body with a servo motor

it will be very complicated...

**niky** · February 2nd, 2012 11:16 AM

The easiest way to convert is to install a throttle body injector run via MAP instead of MAF. This way, you don't have to muck around with injector timing or anything. There are commercial kits like this sold for classic cars overseas, but you'd be hard pressed to find such a kit here.

Here's an example:

Generic Throttle body conversion kits for 4 cylinder engines.

But since that's from the UK, it's hella expensive (about 130-150k pesos)... part of that expense is because it goes the full-bore route, using individual throttle bodies.

EDIT: I was going to write a long spiel here with the parts you'd need to convert your engine using a Megasquirt, a Nissan throttle-body injection system from the GA14, a new electric fuel pump and a custom crank trigger attached to the distributor, but then I realized the Toyota 4AF series also came in throttle-body injection form, and it'd probably be easier to convert to that.

But given how expensive and time consuming it would be, you might as well buy a whole 4AFE and convert engines completely.

**cripple_rooster** · February 2nd, 2012 11:22 AM

It's not impossible to adapt an EFI into the engine, and actually even an older one could be retrofitted with an aftermarket EFI setup. It's not so uncommon in other countries such as Brazil (some Brazilian-made aftermarket ECM's already have an interface that eliminates the need for a computer to be plugged to set the tuning) and South Africa. But I'm favorable to the carburettor.

workaround ideas to discuss between friends: Ancient cars: a real threat to the environment?

A carburettor also has a smaller impact in the environment when disposed than a complete EFI setup with all its wiring and electronic modules, being easier to recycle with low technical resources.

And even repairs or preventive maintenance are simpler, cheaper and can even be performed at home with simple tools. No wonder the Toyota Corolla still relied on carburettors for its entry-level versions in the Philippines until late 90's, for example...

**uls** · February 2nd, 2012 11:55 AM

Originally Posted by cripple_rooster

It's not impossible to adapt an EFI into the engine, and actually even an older one could be retrofitted with an aftermarket EFI setup. It's not so uncommon in other countries such as Brazil (some Brazilian-made aftermarket ECM's already have an interface that eliminates the need for a computer to be plugged to set the tuning) and South Africa. But I'm favorable to the carburettor.

nobody said it was impossible

not easy lang

easy to say not easy to do

easier to buy an efi engine do a transplant than convert carb to efi

**cripple_rooster** · February 2nd, 2012 12:17 PM

Originally Posted by uls

nobody said it was impossible

not easy lang

Okay. But I didn't say it was an easy deal.

easier to buy an efi engine do a transplant than convert carb to efi

That would be the easiest way to do it, but I still don't believe it would really worth if the carburettor-fed engine is still in a good shape.

**GTi** · February 2nd, 2012 05:45 PM

Just replace the whole engine with a donor EFI engine made for Corolla's (para wala nang further modifucation sa mga mountings), get rid of the carb 2E and jam in the EFI engine para wala nang hirap.

But then... Are you after the power and efficiency of having an EFI or are you just in it for the challenge of converting a carb engine to EFI?