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7

tl dr - To directly answer the question, SeaFoam is a pure petroleum product. If an alternative product is made up the same as Seafoam, then I'd think it would work just fine. If its makeup is not similar, you probably won't see the same results. Below is what you are looking for and a recipe for making your own substitute. I found this answer for a SeaFoam ...


5

Direct Injection has a lot of advantages over the MPFI or port injection and its the way of the future. It improves mileage through a stratified charge engine process(basically staying as close to the stochiometric ratio as possible this achieving better burn. Lower emissions. Prevents engine knocking/detonation. Better control of the engine since before ...


5

The injector has a plunger/pintle which is controlled by an electromagnet. The humming you heard is from that. The plunger/pintle has a spring which pushes back against the electromagnet so when the power is shut off, the plunger will close and stop the flow of fuel. This causes the hum. Here is an example of how an injector is built: When the power is ...


4

Yes, it will probably be necessary to fix the problem in order to pass emissions requirements. The secondary air injection pump on the Beetle is apparently used to accelerate the transition from cold start to hot catalytic converter operation. Without this system, it will take longer for the catalytic converter to reach operating temperature. The ...


4

If "injector cleaning" products helped but only lasted for one tank, I would try spraying Seafoam directly in at the throttle plate rather than putting an additive in your fuel. This should be a lot more effective at cleaning the injectors. If that doesn't help, my best guess would be that the vibration is from unequal power from one or more of the ...


3

Sounds like the Idle Air Control Valve and the Intake Manifold must be removed and cleaned. The vibration is worse when in gear than in neutral In gear there is a much greater load on the engine. Power is being transfered to the transmission and then to the wheels. This is going to cause the idle to drop a bit and this is where you'd feel the most ...


2

Just replace the injector plug. I believe it should look like this: You can order it from RockAuto.com for ~$6 (I'm sure you can get it from many other places as well. I would soldier this in place using heat shrink to seal them up. As far as the gaskets go, your vehicle uses the gaskets with the rubber-ish sealing portion (don't know what they are made ...


2

You replaced the engine mounts? I would guess that since you had to change the engine mounts that there is a good chance that the tranny mounts may need to be changed as well...what is the drivetrain assembly like in that car since it is fwd, sometimes if the driveshaft in a rwd car is unbalanced it will cause the car to shake


1

If your driving is consistent, you could test it out by measuring your gas mileage, with shutting your vehicle off at lights, and not shutting it off. You would want to average at least 3 tanks of each to make sure there aren't any weird outliers (stuck in traffic, muggy weather). If you want an exact answer for your vehicle, you would need some way to ...


1

This is line for Fuel evaporation regeneration system.


1

When you reset the lights, it takes a few miles (and certain conditions) for it to get back to a ready state. When it gets there, if it isn't fixed, the lights will pop again. I'm wondering if you have a leak in your intake tract somewhere. Seems you were thinking that way when you replaced the intake gaskets. I'd look at the intake tube between your MAF and ...


1

Based on your information, it appears your transmission is on it's way out. If your mounts were bad and the car was driven for a lengthy period of time, you were putting more stress on the tranny than usual. Being a FWD car with the tranny on the side, Horizontally opposed to the engine, it's verifiable when you say the car "shifts" when turning it off. This ...



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