Aspire motor in festiva?

[crazyrog17]

Oh, 90+ FI. Sticky VAF? Vac leak?

[zoom zoom]

Does it bog down while your trying to accelerate? Does it idle rough and try to stall(occasionally stalling) at stoplights? Could also be clogged egr or clogged cat, run some seafoam thru the intake via the pcv valve hose, i did and it made a world of difference, my car wants to do 25 in 2nd whereas before i had to shift to third before 15 mph.. it's almost like day and night. 170k mi. On my engine/tranny/clutch (clutch will be replaced soon tho.)

[stainless1911]

Does it bog down while your trying to accelerate? Does it idle rough and try to stall(occasionally stalling) at stoplights? Could also be clogged egr or clogged cat, run some seafoam thru the intake via the pcv valve hose, i did and it made a world of difference, my car wants to do 25 in 2nd whereas before i had to shift to third before 15 mph.. it's almost like day and night. 170k mi. On my engine/tranny/clutch (clutch will be replaced soon tho.)

Sometimes trying to accelerate. Last time, was on the highway, mid 70s up hill flat out, trying to keep a steady speed, and keep up with traffic, acted like it was going to quit. Dropped the clutch to the floor, kept it floored, but the rpm wouldnt go up. Stayed around 3,000 or so, full throttle. Thought it was going to quit. I put it back in 4th, kept on it, and it eventually picked back up. PCV is new. Will check hoses.

[crazyrog17]

That does sound like a sticky VAF, especially if you're going uphill, it might have messed with it.

Take apart the air box and check to make sure the vane air flow sensor moves freely by pushing it with the eraser end of a pencil. You can spray a little white lithium grease in there on the shaft if you want, too.

[stainless1911]

Whats the VAF?

Do you have a picture of one? I do have some spare parts from one of the other cars.

[crazyrog17]

Vane Air Flow sensor. If you're looking at the engine, it's on the left in front of the passenger's side shock tower.

It's the top half of the air box and inside is a vane that moves in relation to the volume of air flowing in. It's to help the computer sense how much fuel the engine should consume.

When it's not working right, you'll feel a lack of power, a bog down and it may be running lean or rich depending on the RPM. The computer couldn't put together the right afm.

[stainless1911]

Aah, thanks, I'll look to see if I still have an extra one. I thought that would have been called a Mass Airflow Sensor, I just had that go on the camaro. Any way to clean it? I did with the Z, and it saved me from replacing it.

[zoom zoom]

They actually make a "mass air flow sensor cleaner" i seen it at walmart and autozone... I used electric parts cleaner, but i can't recommend it..i'm just cheap and didnt want to add another can to the milk crate i have full now.

I would highly recommend the seafoam tho, it gets sucked in the intake using the pcv valve hose. It will clean your cylinders and all, I think it makes the cat run alot hotter than normal and cleans it out a bit. Don't add it to your oil tho, it could mess with your bearings if they're old.

The car might be bogging down because a clog in the exhaust, when you step on the petal it doesn't have anywhere to go...causing too much backpressure and ..bogging down..

[stainless1911]

No cat. It was gone when I got it, I did the exhaust from the engine back myself, so I know its clear.

Where do you put the sea foam? I added some to the gas tank a few months ago.

[blkfordsedan]

Pull your intake tube off and check for oil in the VAF meter. If you have a lot of miles and the engine has a lot of blow-by, it can blow excessive amounts of oil into the air intake tube and screw up the VAF meter. If it fills up with enough oil it will actually run back through the throttle body and into the engine when you go up a big hill, causing the issues you describe.

[zoom zoom]

Use 1/3 of a can, pour it in a container (i cut a pop bottle in half) then take the pcv valve out, take the pcv valve off and stick it back in its hole, hold the pcv valve hose in one hand and put your thumb on the end, have someone start the car..if you let off the pcv hose the car will stall, and thats the tricky part, while the engine is running stick the hose in the container and barely open the hose up, so the seafoam gets sucked up in, but you'll have to do short burst increments to keep the engine running..as soon as the last drop of seafoam is sucked in, let the car stall, or shut it off. It really helps to have an assistant at the wheel, if its your first time the cars probably gonna stall a couple times during the process. No big deal tho. Let it sit for 5-10 minutes so the seafoam can sit and soak in and break up the gunk on top of your pistons and all over in there. It might be hard to start the first time, but after you drive for a couple miles and shut it down it will fire better every time. I'd do it at night, and don't drive thru town right after doing it, the car is gonna smoke like a freight train till the seafoam burns out..i whited out my house and my neighbors when i did it..it was dark tho, around 10pm..

[stainless1911]

Thanks for the instructions, and the heads up on the smoke, that woulda scared the crap out of me.

[FB71]

don't use the pcv line, that feeds WAY too much fluid into the intake too quickly. Use the small vac line connected to the fuel pressure regulator.

[zoom zoom]

Toemaetoes toemaatoes, all goes to the same place right? Ive never heard of using the fpr line, but i'm sure it would work about the same, ive only ever heard of people using the pcv valve intake port.

[FB71]

Toemaetoes toemaatoes, all goes to the same place right? Ive never heard of using the fpr line, but i'm sure it would work about the same, ive only ever heard of people using the pcv valve intake port.

Nope, apples and oranges...

Feel free to use the PCV line if you want to hydro-lock the engine and bend a connecting rod...

Use the FPR line if you want to safely meter the volume of liquid into the intake.