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Questions tagged [fuel-injectors]

A device that meters the proper amount of fuel into an engine cylinder. It is controller by the engine control computer.

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Question about aircraft engine injector system

i was recently working alongside an aircraft mechanic on a turbocharged 6 cylinder fuel injected engine (a Lycoming TIO-540 if your curious) and the complaint from the customer was that it would ...
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1answer
30 views

Where is the injector circuit on a 2007 Toyota Yaris?

I have the PO201 error code which appears randomly every 30Km to 50 Km. The issue sounds possible as the car ran 2000Km with a damaged spark in cylinder 1 before repair. However, they are no circuits ...
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54 views

Rebuilding EV1 Injectors

I recently bought the parts to rebuild EV1 (34.6# @ 43.5psi) injectors. The parts include the microfilter, flat support disk (for the injector end), and the supporting top cover (for the fuel rail end)...
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My honda cbr600f4i does not rev smoothly in cold start

I have a honda cbr600f4i that does not rev in cold start, is that normal
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53 views

1999 Chevy Suburban 5.7 - What is “Valid Reference Pulse”

Searching google for that exact text in quotes (what the scanner shows) yields basically no results. What does it refer to? For some context that lead to this question, I'm not getting my injectors ...
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1answer
174 views

Calculating fuel flow rate through obd || sensor not supporting 015E and 0110 commands

I have been working on a project where i want to calulate fuel flow rate using data from the obd2 sensor. The car on which i was testing didn't support the pid 015E which is for fuel flow rate. Then i ...
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Diesel engine struggling to start when cold

I have a 2.7D Ford AJD-V6/PSA DT17 diesel engine, on which I recently replaced 3 fuel injectors (all 3 of them were leaking). After the injectors were replaced, I now encounter the following problem: ...
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38 views

Replacing diesel injectors

Two weeks ago, I purchased a 9 year old, second hand Ford Fiesta from a UK used car dealership. It's done 58,000 miles, has a full service history and has had a recent MOT. After the first week, one ...
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1answer
310 views

Injector leaking/seeping clean diesel over nut/body

I've got a 2005 Mazda 3 (ford inside), engine DLD-416/DV6/MZ-CD 1.6 Diesel, 109 PS. When I was blanking the EGR valve I saw some diesel surrounding the injector bases on all the four injectors. The ...
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1answer
155 views

Volvo V50 felt like it was stalling while accelerating then engine stopped

So I bought a Volvo V50 about half a year ago and have been having some issues with it lately. The one problem that has been recurring is that often the engine has very little power. By little power ...
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1answer
199 views

Are these fuel injectors leaking? How to fix?

please advise me if these 2 fuel injectors are leaking? If so, how to fix it? My car is Toyota Matrix 2010 (103,000km). (photos below) Thanks.
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Leaking injectors

How long would it take to damage a diesel motor where oil is diluted heavily with diesel,due to leaking injectors,engine made clunking sound and masses of black smoke poured from exhaust, service ...
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68 views

Diesel Injector Well full of Carbon

While looking over my friend's 08 Kia Carnival J3 2.9L Turbo Diesel, I noticed a strange huffing noise. After removing the decorative engine cover I discovered this: This injector well is filled ...
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40 views

Car Jump Started in wrong way

We switched the jumper cables when trying to jump start my Altezza 4 cylinder. Main fuse and other fuses were blown. I replaced all the damaged fuses and battery. When we eventually got the car to ...
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Diesel van not starting in hot weather

I have a self-built motorhome, Renault Master, 2003, with about 100k and a G9U engine, which does not start when I park it in the sun in the hot weather. Part of this is due to the immobiliser ring ...
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Help maintenance & repair

06 Pontiac g6 will not start! I recently changed fuel pump. I am getting fuel to the fuel rail with pressure but fuel injectors are not opening. I can pour gas in the breather and it will start until ...
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1answer
60 views

Running fuel injector outside the engine

I want to use an arduino I have lying around to make a fuel injectors tester/cleaner. It looks pretty simple, just connect the injector to a battery and the pin that goes to the ECU to a pulse ...
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63 views

Number of diesel injections per revolution

A modern TDI using a piezoelectric injector may have up to as much as five injections per power stroke as far as I've read. Given a four stroke, four cylinder TDI engine using injectors of that type, ...
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32 views

How can I clean out bad fuel from my diesel engined VW Transporter?

How do I clean out bad fuel from my VW transporter TDI, and also clean the injectors. Can I do this myself? Edit: Dirty/water fuel not incorrect fuel. It’s dirty...
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USA vs Europe fuel injector differences?

This question is out of curiosity as I didn't find any specs or datasheets after plenty searching. What would the differences in the fuel injector be for Europe vs USA markets? I've compared ...
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1answer
151 views

Can fuel trim (LTFT) be too high or too low? Not using stock injectors

Application is a '97 Jeep Cherokee 4.0L straight-six I installed EV6 fuel injectors to replace the outdated EV1 injectors. The new ones are slightly higher flowing I think. old: 23.2 lb/hr @ 49 psi ...
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142 views

High concentration fuel detergent effects on oil

I just did an oil change. I was planning on putting some fuel detergent in the tank and run in through before the oil change but forgot. Can I still put it in now without having negative effects on ...
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50 views

Car keeps breaking fuel injectors?

Ok so i'm having quiet a strange issues with one of my cars (08 X5 E70 4.8L V8) that may be worth discussing. It seems to keep "blowing" through injectors on only one bank. Suddenly i noticed CEL and ...
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5k views

Leaking fuel injector

If the body of a fuel injector is leaking (allegedly) and flooding a spark plug, there is any chance of fixing it cleaning the injectors or do I have to replace it 100%? How can I determine which ...
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fuel injectors in a 2003 Cadillac Deville

What determines when your fuel injectors need cleaning? My car is emitting white smoke when pressing on the gas petal after stopping at a traffic light.
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alternative and compatibale injectors

A ford focus MK2 owner has been advised to replace the fuel injectors but the brand new OEM injectors are rare and expensive, so we are looking for compatible injectors that are used for another brand ...
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2answers
52 views

Is common-rail unreliable by nature?

After having a common-rail diesel car with low mileage who broke 4th injector, and one year after the 1st injector, I tend to be suspicious about the system. It features a deposit where fuel is at ...
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3k views

No voltage on injector lines following engine rebuild

I have a 2012 Ford Fiesta 1.4 L TDCi. It was starting normally but the engine had major mechanical problems so I have rebuilt it and put it back in without touching any electrical part. Now I'm ...
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Bad fuel efficiency and suspected sticky / dirty injectors

The fuel efficiency on my 99 Nissan Almera 1.6L MTX has always been a bit below what I would expect, and the idle has gotten a bit rough lately, so I started poking around with a scope to see what I ...
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2answers
2k views

Best practice for replacing fuel injector o-ring?

Never worked on fuel side o a car so have a few concerns: What's best way to relieve fuel pressure? After swapping o-rings, does a lubricant need to be added to the o-ring to prevent damage when ...
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2answers
2k views

Wiring harness splicing - Soldering or Crimping Method

I need to rebuild the injector harness on an old vehicle using Y-splices on the wire to reduce cable usage/lengths (V12 engine). My question now is how to to the Y-splice on the wires. Soldering ...
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07 Camry Engine slow RPM and excessive fuel consumption reading

I have 2007 Camry manual made in Australia for Arabic gulf. The engine sometimes go to 500 rpm and suddenly stops. Or it also goes to 1500 rpm and doesn't return to 1000 rpm (which is the normal as ...
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430 views

Mixing sea foam and gumout

I have clogged fuel injectors. I used gumout in my gas tank and it's not working. Can I mix sea foam in with it?
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Looking for Fuel Injectors for a Renault Clio Expression 1.5 cdi 2006 plate

I am looking at buying a set of fuel injectors for my car but not sure of what part number I can use. Equally can you buy a manual for car parts? Any help would be appreciated. Thanks in advance.
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62 views

Why have to concentrate on exhaust gas instead of inlet mixture in Indian Bikes for emission control [closed]

I am having Apache RTR 180 (carburetor version) . Having a question towards Bharat Stage (BS) (Emission Norms) against bikes. Recently went through BS specification. To achieve this, we are going ...
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1answer
80 views

How Carburetor/FI will handle fuel supply in high inclination angle

Lets consider, we are going in inclination. (ex:some where > x Degrees). At this time, how carburetor will pump the fuel into the cylinder. Since of high inclination, it is very difficult for the ...
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1answer
688 views

Volvo 2.0D engine “self-oscillates” after changing timing belt and adjusting fuel-injectors

I recently had the timing belt and water pump changed on my Volvo s40 (2006 2.0D diesel). The mechanic also cleaned and adjusted the injectors. After the service I noticed that att some rpms the ...
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Do I have a fuel pressure or injector problem Part 2

This is a continuation of my previous fuel pressure / injector question. So the missing part for my fuel pressure gauge came in and I was able to do a few more tests. The first thing I think is that ...
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2k views

Why is my car hard to start only after a few hours?

Car: Audi S5 V8 FSI, Direct Injection I posted a question related to this but might not be the correct issue: Do injectors leak or injector seals leak? Background 2 months ago (1200 km) I performed ...
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1answer
859 views

Do injectors leak or injector seals leak?

Car: Audi S5 2008 I have a problem in my car where sometimes my car will be hard to start after driven for a while. Normally if I floor it close to where I stop the car, it's harder to start. When I ...
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2answers
653 views

Why are my injectors different colors when they all have the same flow rate?

As can clearly be seen in the picture, the injectors on my 98 Mazda 626 2L GF are different colors: This is even mentioned in the official Workshop Service Manual: However, both according to the ...
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1answer
377 views

What does a good injector spray pattern look like for a four hole injector?

I have four hole injectors like this on my 98 Mazda 626 2L GF: What does the proper spray pattern for this type of injector look like?
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1992 Ford F-250 4x4 5.8l 408ci stroker tuning questions

I have a 1992 Ford F-250 4x4 w/a 5.8l blocked 408ci stroker attached to a ZF 5 speed tranny running 3.55 gears. On the engine sits a set of 64cc chambered, 190cc intake runner, 70cc exhaust runner, 2....
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211 views

Do I have a fuel pressure or injector problem, or am I just chasing ghosts?

I just did a fuel volume test on my 98 Mazda 626 2L GF. According Tim Giles book Automotive Service: Each injector is energized for 15 seconds... Variations of more than 5 ml calls for replacement ...
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1answer
93 views

How Long to Power the Injectors for a Fuel Pump Volume Test?

I want to do a fuel pump volume test on my 98 Mazda 62 2L GF, but the WSM doesn't say how long to energize the injectors: I'll probably activate the injector by back probing the injector ground wire ...
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1answer
175 views

Why Ride by wire when the fuel injector is there

I feel confused on understanding this system on 1. The difference between FI and Ride by Wire 2. how it improves the fuel efficiency when compared to the ride by wire system and conventional ...
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1answer
246 views

Is 12 volts safe for testing injectors?

I'd like to do a volume test on my injectors, and was thinking that I would activate each one by jumpering it to the battery ( about 15 seconds per injector. ) The thing is that if I understand ...
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1answer
4k views

Do you need to replace injector seals if they are removed from the intake?

Car is a Audi S5 2008, direct injection, 8 cyl. I will be removing the intake manifold to clean the intake ports of carbon. In the process, the fuel rail needs to be removed. The injectors aren't ...
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4answers
300 views

Why isn't injection managed to use the entire intake stroke?

As far as i know, electronic fuel injectors only know two discrete states, on or off. Under light load (ie. low rpm and throttle) the injector doesn't have to deliver much fuel. So naturally the ...
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1answer
129 views

Why do injector prices vary so vastly?

I'm gathering components for my setup, and at the moment I'm looking for injectors. Those things go from $8 at AliExpress to $150+ per piece at the "genuine stealership". One thing really ...