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Questions tagged [gasoline-direct-injection]

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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 ...
Zaid's user avatar
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4 votes
1 answer
1k 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 ...
Zaid's user avatar
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3 votes
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683 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 ...
Thesubhuman's user avatar
3 votes
10 answers
29k 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 ...
André Borie's user avatar
2 votes
2 answers
523 views

Why are two stroke direct injection engines uncommon?

Traditionally, there have been two kinds of engines: two stroke and four stroke, and diesels exclusively were four stroke (apart from maybe very large marine diesels). The two stroke engine has some ...
juhist's user avatar
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2 votes
3 answers
4k 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 ...
Craig Younkins's user avatar
2 votes
0 answers
127 views

Is port injection better for short trips?

My wife and I are considering to buy a car, but most of our trips will probably be around 2-4 miles long (drive a kid to school and back, stop by a supermarket). And, maybe, one longer trip once a ...
Andriy Makukha's user avatar
1 vote
1 answer
5k 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-...
Scorb's user avatar
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1 vote
1 answer
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Wrong injectors in 2 ports

I have a 2015 Cadillac Escalade luxury 4wd with 6.2 regular gas. I changed 2 injectors but by mistake the 2 i installed are high flow and the correct one should be low flow what is the worst that csn ...
Daniel Ramos's user avatar
1 vote
0 answers
35 views

Is it safe to use lubricant or antiseize on DI injectors?

I'm working on a 2010 Range Rover with the 5.0 which has direct injection, but my question is about direct injection engines in general; not necessarily just this model. I'm going to be putting new ...
atraudes's user avatar
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1 vote
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Do you still need to tune transient throttle in a direct injection engine?

Transient throttle or acceleration enrichment is a way to model the fuel bubble that's stuck on the intake / valves and doesn't make it into cylinder. So when throttle opened sharply, extra fuel will ...
Ruslan's user avatar
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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 ...
madhushankarox's user avatar
1 vote
0 answers
2k 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 ...
Thesubhuman's user avatar
0 votes
0 answers
54 views

Recommended gasoline types for BMW i3 --- store gasolines to extend the range

What are the recommended gasoline types for BMW i3 2014 or BMW i3 2015? I search online for a while, but I am not sure what are the types of gasoline we can use for BMW i3 2014 or BMW i3 2015? Is it ...
wonderich's user avatar
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2 answers
297 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 ...
madhushankarox's user avatar