Questions tagged [air-intake]

The point at which air enters the intake tract of a motor vehicle or stationary engine

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1answer
45 views

How to know to what extent, if any, an engine has been damaged by dirt?

Today I realised that my engine air filter had been improperly installed. One of the clips of the covering was not closed properly. I think its because I didn’t unscrew the intake pipe while ...
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0answers
33 views

What is this connection on the air intake right before the turbo?

This is the engine bay of a Citroën C5. I would like to know what the connection indicated by the red square is for. I removed the air duct once to check the EGR valve and there was a little oil ...
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31 views

Mazda Demio 2002 75HP 1.5 high engine RPM on idle

I am the owner of Mazda Demio '02 1.5 75HP (engine code B5E). The car has an issue of high RPMs (more than 1000 and hestitating) on idle. What is interesting here is whenever I press and hold the ...
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2answers
28 views

1986 Dodge B van, 5.2L, heated air intake, replace, leave, or remove?

There is an ugly part in my old Dodge b250 campervan somebody has helpfully held in place with an coathanger. It consists of a duct (with torn sections) from the manifold up to the intake of the air ...
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1answer
42 views

2006 Honda Civic hybrid low idle

I changed my air intake and everything seems fine except I noticed my idle is below zero rpm now the car feels fine. Is the car not use to the normal amount of air it's getting now? It seems to be ...
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1answer
154 views

Difference between banks for AFR & O2 sensor values

This is a well maintained 2007 Subaru with 140k km on the 3.0 litre six cylinder EZ30R engine. She's running a little scratchy most noticeable when cruising although no codes or anything. I decided ...
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1answer
37 views

Could broken air filter seal/gasket impair intake?

I am getting a P0101: Mass or Air flow Circuit and noticed that my air filter gasket is getting dangly in places, which might be causing it not to seal well. Could that be causing impaired air intake, ...
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1answer
32 views

P0022 after fixing P0348, camshaft related

Vehicle: Toyota Tacoma 2006 V6, 155K mi Problem: I had OBDII Code P0348: Camshaft Position Sensor A and fixed it by replacing the broken camshaft position sensor. However, the check engine light didn'...
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8 views

2000 Toyota Echo with manual transmission has air intake box rattle

On startup and when I run the air when the engine shakes a little we hear a rattling sound. If I hold onto the air (where the air filter is located) I don't get the rattling sound. I removed and ...
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1answer
20 views

Where is air inlet to draw air when AC is in re-circulation mode?

When we put the AC in re-circulation mode. It is supposed to draw the air from cabin, send it to AC for cooling and then throw it out of Vents. But where is in air-intake in this mode to draw air from ...
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0answers
42 views

Could a vacuum leak cause a drop in manifold absolute pressure?

I've been doing some reading and speaking to a mechanic trying to diagnose a hesitation and rough idling issue. I think I've ruled out a vacuum leak by spraying flammable gas around the seals and not ...
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1answer
51 views

Mass Flow Sensor missing

I've recently purchased a Volvo V70 I 2.4 (106kW, 1998, manual) and wanted to check the mass flow sensor for issues. But it appears that my car has none, even though I've seen them in all pictures and ...
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2answers
823 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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61 views

Diesel intake heater DIY

I am the owner of an older 3.0 liter diesel car and winter mornings are quite painful for both me and the car. Even though thermostat is fine, heating takes forever. I know diesel only heats up while ...
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1answer
129 views

How does Ken Block's Hoonicorn V2 filter air from the turbos?

Ken Block's 1965 Ford Mustang dubbed the "Hoonicorn V2" features a pair of turbos that stick out of the hood. If you look at the picture of the engine bay there appears to be no air filtering ...
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3answers
459 views

Would restricting air intake reduce fuel consumption?

I own a Yamaha YS125 which is fuel-injected, and a lot of times I am flogging the bike on full throttle, which increases fuel consumption. I was thinking of restricting the air flow intake of the ...
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1answer
43 views

Does the air intake system in a VW CC 2010 go around the engine?

I am trying to visualize what the air intake system in my car looks like. It's a turbocharged 2.0L VW engine. As I understand it, the air intake is on the front right near the radiator and headlight....
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1answer
44 views

Focus 2003 1.8 TDCI starts, but struggles to start in the morning

I have a question, well two. Basically I have bought 2003 Focus TDCI but it is struggling to start in the morning? It's not exactly cold, so I don't understand why it would struggle. It has been about ...
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0answers
168 views

Driving through a puddle

I have already asked a question on this board but I have another question. Sorry I am not good with cars so I don't know the lingo.I have a 2017 Chevy cruze. I drove through a deep puddle at about 40 ...
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1answer
70 views

High rpm on neutral but flatting the gas pedal on D doesn't increase the rpm

I am making this question as an update to my previous question . I am not sure if updating that question will draw attention to it or keep it buried in the sea of questions here, if it gets updated ...
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1answer
345 views

Can removing temporarily disconnecting filter damage car or not?

I bought a civic vti and when running the car the vtec didnt sound as loud as the test drive. the seller told me that was because he removed the 'whales penis' modification which I had agreed to. He ...
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3answers
55 views

Why wont my Toyota dual cab 2004 3.0lt turbo diesel wont go over 100km/hour

I have just bought a new Hilux, its had work done too it aswell as been RWC approved and registered. But i notice yesterday coming back home that it was struggling to get up to 100 or over. I am ...
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1answer
175 views

Audi TT Turbo and Dump Valve Issue

I've picked up a 1.8 TT Turbo Quattro which has been fitted with a K&N filter and dump valve by the previous owner. My (basic) understanding of how this works is that it should release the air ...
2
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1answer
82 views

What are the possible causes for the car to increase power by itself?

I have a 1993 Fiat Panda 1.0 i.e. (gasoline) with single injector. Last year it started to present a very specific issue: from time to time (but basically now it happens every time I drive the car) it ...
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2answers
3k views

Would it make sense to put a cold air intake in the 'stock' air filter box?

I have an Audi A6 C6 4F2 - 2.4L V6 and I'm wondering if I should put in a cold air intake. As seen on the picture right here (left side), there isn't much space.. I was thinking to put the ...
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4answers
747 views

Does cooler air improve turbo performance?

When modifying NA cars I've always been advised to try and protect the intake from heat soak from the engine bay because the engine performs better with cooler air. This makes sense. I now have a ...
2
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1answer
1k views

2010 Nissan Sentra - Idling rough in reverse, occasionally stalls when stopping

Been having an issue with my 2010 Sentra where the idle in reverse is very rough and has very little power. As well when making abrupt stops in drive the car will occasionally stall, but start back ...
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1answer
78 views

Seafoam Spray in 2008 Accent

Good day, My GLS Accent has a 1.6 MPI automatic engine that I bought new in 2008 has about 150,000 Kilometers on it. With basic service (not from dealers), petro 91 octane fuel and synthetic amsoil ...
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1answer
347 views

What to use to seal airbox gaps

Bike is a 2006 ZX-10R. I've taken out the screws in the air box to split it into two halves for cleaning (not just taking the lid off). Putting it back together, I'm noticing some gaps that were ...
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1answer
107 views

Precautions before changing air filter [closed]

I am using Chevrolet Sail-Uva Diesel 2013 model(India). I am about to change my air filter. Is there any cleaning process before changing air filter in cars? Anybody have great tips can improve this ...
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5answers
15k views

What do hood scoops do to prevent water being ingested in to the air intake system?

I'm planning a modification to my 1998 Toyota Corolla, replacing the stock air intake with something along the lines of forced air induction via a cone air filter. Air will be drawn in to the car with ...
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1answer
108 views

IAT reporting below zero temp on MB w168

I have a first version MB w168. This car has the MAFs/IATs soldered to the ECU. You can't replace those without replacing the whole ECU. Anyway I have an obd scanner which works with this car and I ...
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1answer
759 views

Help me diagnose the cause of this intake valve burn

I would like some help diagnosing the probably cause of this intake valve burn as seen in the picture. 167fmm engine. 229cc OHV push rod type. Now here is the rub. this is engine originally 9:1 CR, ...
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3answers
1k views

Could taking coolant through the intake filter realistically cause permanent inability to start?

Diagnosing failure to start on a 2001 Honda Prelude SH, still in brainstorming phase. Leaving out list of other thoughts because this question is specifically about this possibility, rather than ...
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1answer
560 views

What would happen if i took the throttle plate off my 5.3L V8 engine?

The throttle body helps regulate air right? Can't it also restrict air as well. For example put your hand over your mouth and try to breath in. If I took it off wouldn't I be able to get more air in ...
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1answer
812 views

Effect of smoke ingestion on fuel injected car engine?

My father asks, can smoke in the air from wild fires cause a fuel injected engine to choke? (He seems to think this was once true for carbureted engines - was it?) My personal guess is that we can ...
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1answer
872 views

Planning to fit an oil catch can into my car. Any problems with this setup?

I own a 2007 Ford Fiesta ST150, I have modified it a little, one of the mods is a cold air intake. I want to install an oil catch can setup, but as the PCV vent is behind the intake manifold and ...
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2answers
104 views

2012 Mitsubishi Galant SE

So I have a 2012 Mitsubishi Galant 2.4l and I'm looking for a cold air intake system but there isn't one for my car. I've been looking at a lot of websites but there's nothing. I searched and I found ...
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0answers
726 views

Calculate Intake Manifold Absolute Pressure from MAF Engine using OBD Data

I need to calculate Intake Manifold Absolute Pressure from OBD Data. I have Toyota Corolla GLI 2010 Model. This car has MAF engine which does not return Intake Manifold Absolute Pressure. Where'as I ...
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2answers
216 views

How much oversize should you target when choosing a throttlebody?

This is in addition to my previous question about throttle bodies. I know it may sound a bit subjective, but I think it has a clear technical aspect, and I have done a considerable amount of homework. ...
7
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1answer
506 views

What does a wet intake port (direct injection) mean?

Car: Audi S5 4.2L V8 FSI I have my intake manifold out to clean carbon of the intake ports. When I was removing the port separators, I noticed some were really dry (light grey carbon), others were ...
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1answer
766 views

Is this a right MAF signal?

I've just bought this MAF sensor for the injection setup I'm going to build, and first I was struggling to figure out how to connect it. It's used for several BMW cars.(E38,E39,Z3) On the connector it ...
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1answer
69 views

10/89 (1990) Subaru Legacy EJ22 - OBDI Code 45

10/89 Subaru Legacy EJ22. NA. Multiport Fuel Injection. Throwing... Code 45: Pressure duty solenoid (turbo)/atmospheric pressure sensor circuit (non-turbo) Where is this thing located? I ...
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2answers
2k views

ITBs with a charged engine

Are there any benefits of running independent throttle bodies with a super/turbocharged engine, as opposed to running a single throttle body on the same engine? If so, what are the benefits (and how ...
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1answer
987 views

What is this U shaped tube sticking off the intake hose?

On the intake hose for a 2001 Honda Prelude SH there is this U shaped tube with one closed end (sorry about blurry shot): (The tiny thing sticking up on the top left isn't a tube it's just a solid ...
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1answer
983 views

What else should I inspect after repairing hole in intake hose?

I discovered a hole in my intake hose (2001 Honda Prelude SH, ~190k miles), downstream from the filter: I've got a new hose coming and just patched it up with some duct tape in the mean time. I have ...
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0answers
280 views

China yy50cc qt-6 scooter fires up but when throttled it will choke out and stall

I can't get it to fully open wide and run. 2013 model, any help would be great. P.S. had a 80 cc modification done and also the jets were upgraded as needed. I'm thinking all my air hoses are out of ...
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1answer
46 views

what the torque should be on my 2000 gmc 4.3 intake maanifold

I need to know the torque on intake manifold bolts on 2000 gmc Sonoma with a 4.3 motor
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6answers
27k views

Cold Air Intake and Engine Wear

I'm contemplating whether or not to retrofit my car with a cold-air intake and performance air filter. Will doing so lower the lifespan of my engine? That is to say, increase likelihood of engine ...
3
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1answer
65 views

after replacing icv,intake boot,valve cover gasket and return to stock air box from CAI,car will not hold idle 325i 1994

Car will not idle after re-installing stock air box from previous cold air intake. I replaced idle control valve also replaced intake boot as well as valve cover gasket along with spark plugs, BMW ...