Hilux 4x4 Forum

Ek is opsoek na 4 injectors vir ‘n 2.7 3RZ IFS Hilux. Waarmee vervang mens hulle? Gaan Bosch vandag bel, enige ander opsies. Die agente is bietjie duur.

I also had to replace no3 on my 3rz hilux, tried all over and the agents was the only option.

Everyone looked as me as if I was mad looking for those things "cause they never break". but turned out when cold the injector would go open circuit hence miss firing and not reading the signal from the ECU.

Thanks Ismail

If anyone wondered, R1437.50 per injector at Gemini parts and its OEM injectors.

Thanks for the info, good to know

I have had my 2700i 10years and now having injector issues for the third time. The same symptoms each time misfire on a hot start(engine off for +/- 15 minutes), it doesn’t do it cold or say a few minutes after switching off like filling up with petrol.

2010 177000km No 2 took a while to figure out it was an injector, I had them cleaned first but misfire was still there but once I checked resistance no 2 was way out of spec and readings were very unstable. Should be 12 - 16 ohms at 20C


2014 243000km No 3

2018 330000km No 1 this one was tricky same symptoms but cleared after a few seconds of starting and ohms was okay cold and warm but 15 minutes after shutting off a hot engine the resistance is out.

Gemini quoted me R 1100 excl VAT each for all 4 for that price I think I will replace them all, especially seeing no 4 has also done 330000km! on it and probably also pack up soon and no 2 150000km on it.

I remember reading that 2 & 3(on 4 cylinder) are more likely to go first because of heat soak when engine after engine is shut off(less cooling the centre than outter cylinders) as the fuel evaporates it leaves deposits on the injector.
The build up of deposits causes the coil to malfunction.

I going to start using Chevron Techron concentrate every 5000km or so to clean deposits, these seems to be very highly rated in the US.

Thanks for the info Stephen. Diesel injectors I can understand giving problems due to the high pressures that they run at, but petrol injectors in my experience very seldom give hassles, so it's interesting to hear and also the cause (evaporative fuel deposits on the coils).

Here is the description of the heat soak:

"When the engine is shut off, the injectors undergo heat soak. Fuel residue evaporates in the injector nozzles, leaving the waxy olefins behind. Because the engine is off, there is no cooling airflow moving through the ports and no fuel flowing through the injectors to wash it away, so heat bakes the olefins into hard varnish deposits. Over time, these deposits can build up and clog the injectors. A vehicle may have low mileage, but short drive cycles and increased heat soaks can clog the injector.

Since the formation of these deposits is a normal consequence of engine operation, detergents are added to gasoline to help keep the injectors clean. But if a vehicle is used primarily for short-trip driving, the deposits may build up faster than the detergents can wash them away. On four-cylinder engines, the No. 2 and No. 3 injectors are in the hottest location and tend to clog up faster than the end injectors on cylinders No. 1 and No. 4. The same applies to the injectors in the middle cylinders in six- and eight-cylinder engines. The hotter the location, the more vulnerable the injector is to clogging from heat soak. Throttle body injectors are less vulnerable to heat soak because of their location high above the intake manifold plenum."

Thanks! You live and learn. Just yesterday I was telling someone with misfire issues on a petrol motor that the injectors are unlikely culprits - I'll have to tell them about this.