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Questions tagged [gasoline-direct-injection]

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0answers
124 views

Analysis of spark plugs [PHOTO] and fuel trims

Again, this is a 2002 Nissan direct injected engine (QR20DD). By judging spark plugs, I assume that the air / fuel mixture is not rich. May be some kind of a lean condition? But the issue is fuel ...
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3answers
497 views

Will dislodging carbon deposits harm the catalytic converter?

If I use an intake valve cleaner that dislodges chunks of carbon from the intake valves or piston head, and they flow through to the exhaust, could they harm the catalytic converter? I'm interested ...
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1answer
68 views

Tailpipe tip color analysis [PHOTO] What is the good tailpipe tip color?

My Nissan Sylphy with a 2L Neo Direction Injection engine was running rich due to 2 faulty injectors (leaking) and I replaced all 4 injectors three months ago. I have put 2000Km during this three ...
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1answer
800 views

Any stable alternatives for Z22YH (GM Ecotec GDI engine) high pressure fuel pump?

the main problem with these pumps (part number 815049) are: 1. Expensive: about 400€ for a new one, very hard to find a working old one. 2. Membranes: the membranes used in these pumps get broken ...
3
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0answers
352 views

What is the normal voltage of 5-wire oxygen sensor (lambda probe)?

I have got a 2007 Opel Vectra GTS 2.2 Direct car (which still has a high pressure fuel pump problem, yet to be solved). Petrol, 114 kW, engine Z22YH. After getting an P0130-52 (No Plausibility ...
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10answers
19k views

Is Tom Ogle's 100+mpg engine actually feasible? [closed]

I've just read about Tom Ogle, an inventor who claims to have built an fuel injection system that can achieve 100+ mpg and has apparently proven it, before dying in suspicious circumstances. From a ...
3
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1answer
718 views

What sort of maintenance do GDI injectors need?

The 2014 Lexus IS350 reminds the driver that "injector maintenance" is required every 10,000 km. Besides this advisory annoyance, as far I can tell there is no difference in drivability. I don't ...
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1answer
1k views

GDI intake cleaning before or after oil change?

I drive a 2014 Kia Rio 1.6l engine with direct injection. I am at 22000km and considering using this intake cleaning product that gets sprayed into the intake. http://crcindustries.com/auto/intake-...
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1answer
8k views

Differences between Homogenous and Stratified-Charge operation

Gasoline Direct Injection (GDI) is becoming increasingly common in road-going production vehicles. From what I've read, GDI enables both stratified-charge and homogeneous modes of operation, which ...