Last week some time I decided that in order to fight global cooling I was going to take off the emissions stuff off my car. I have started with the cat, I had a straight pipe made for about $15 at a muffler shop where a guy I knows works. I’ve ordered the belt to bypass the smog pump, three of them as a matter of fact. Found them on ebay for .50 each. Soon as they come ill put one on. I did this hoping for some better performance and it did improve, gas mileage is better as well.

Anyway I did all this because the car started acting just a bit to sluggishly I thought it was the cold. As long as I started it up and let it warm up it ran ok just kind of rough that’s all. It’s always had an idle fewer than 1000 rpm but I noticed that it was getting higher and higher.

So I decided to try the seafom stuff. I’ve been reading about it here. Had my trusty neighbor at the pedal got the car up to its max temp and told him to take it up to 4000 rpm and hold it there. Sprayed the seafoam down the carb and initially it didn’t seem to do anything. The rpms backed down but the neighbor gave it more gas. I kept spraying then all the sudden there was a thick cloud of smoke coming out of the tailpipe. The smoke turned blacker and blacker I used the whole can (it didn’t come in a spray can it came in just a can so I used an old cleaned out Windex bottle) then it began to go from black back to a white smoke. I ran out of seafoam and had him just sit there until all the smoke went away, and had him run it for a minute longer.

The result? Well now I got my idle down to 500 rpm. Before when it was cold I had to wait for it to heat up or every time I went to stop it would die. It doesn’t do that anymore. Also it no longer runs as rough as it did before it seemed before I could feel the engine rotate I don’t feel that anymore and it’s a lot quieter. And I am sure my acceleration is vastly improved.

Seaform really seems to work. I’ve been running the car now for three days since I used it and it’s almost like a rebuilt engine.

 

Spraying it down the throat of the carb i've heard doesn't do as well as just dumping it in the gas tank itself. That's what i usually do to break up carbon in the engine but that's some good info for future reference. =]

Be aware though when you put it into the gas tank it will break up varnish in the tank, thus MAYBE sending some debris into the fuel filter causing leaning out.

 

Sounds like you had a lot of carbon build-up in your engine from all that black smoke... I love Seafoam! works everytime!

 

Seafoam is awesome... In my first 7 the engine was from an auto.... so it had a bit more carbon in it...so I used it for about 3-4 months... once i was low on gas i would put some in the gastank, and the rest that didnt come out i poured right down the carb... and it cleaned it out and after a while i could just turn the key with out any pumping of the gas. it was nice

 

and i liked putting them in the secondaries and then open it up while driving and that helps to

 

I cleaned my EGI throttle bodies/Dyanmic Chamber with Seafoam Deep Creep Yesterday then re-adjusted my TPS. My car was heaps smoother and the idle was spot on.

 

I hate Seafoam. I used it and then my motor blew up!



Just kidding... I've used the stuff regularly for years now. I recommend adding a full can to about 1/8 - 1/4 tank of gas, then going for a drive. Less hassle than dumping it down the carb, and the results seem to be the same or even better.

In my opinion, the more miles you have on the motor the more often you should use it. It is my belief that with lower compression, you get more carbon buildup. My motor had over 200k miles on it, and I used it monthly and always saw a huge difference in power output afterwards...

 

I've used the stuff a few times, but I have not actually noticed any results, good or bad. I think part of that is due to the fact that I beat the hell out of my car, and redline constantly. Also because the car is fairly low mileage. But I do believe that a bit in the gas tank is a good preventative measure every now and then.

 

Putting it through a PCV/vacuum line cleans the actual intake tract where carbon can build up, just putting it through the fuel tank doesn't actually do anything for the intake itself. It does help with the injectors or carb jet in that case though.

I also pour some in the engine oil when I'm about 100 miles from an scheduled change.

 

I'm not sure I understand what you mean here. If the Seafoam goes into the carb along with the gas, then it will clean everything from the carb, through the intake, and the motor. The only thing it won't be getting to would be the air filter.

Putting it in through any vacuum port on the intake would only result in missing the carb itself. What am I missing here?

 

The reason I put it right down the carb is because I know my tank is full of crap. The car was parked for 7 years with allmost a full tank of gas. When I went to take it out of storage I used the fuel pump and disconected a line at the carb to pump out the old gas. I had to replace the fuel fileter TWICE before I was done. And the gas had evaporated down to less than a 1/4 of a tank, and thats in a closed system. I just know there is a solid layer of glaze at the bottom of the tank and I did'nt want to break it up. As it sits every time I change my oil I allways change the filter.

Also I did not want to have to carry yet another spare part. I allready carry fuses tools brake and clutch fluid ect.

Another thing that i did that I think improved my performance is I led an extra lead off the battery to ground and ran a wire right of the nut post on the alternator to the positive on the battery. No more dead battery and my volt meter went up 1.5 volts under idle.

 

^ He's talking about EFI. He has a SE.

 

On an FI system, I guess I shouldn't have said carb. On an FI system there is a difference between putting it through the PCV/vacuum as opposed to the fuel tank.

 

So.....what is seafoam and can I get in it Canada and where?

Yup, I'm still a newbie.

 

^^About $10 a can at the westend NAPA location. Last I got some it was on sale for about $8.88 a can.
And yes it works great.

 

Last year I bought a case of it for $5/can, I can't seem to find that deal again. At VatoZone and Advance you can also buy it by the gallon.

 

Thanks Waysrx7!

 

i did it to my car, full can to 1/8 tank or less, and didnt notice anything but a spiking oil pressure gauge, but i suppose you can blame that on me just spraying the engine down at the car wash.

 

I got about 30 cans of seafoam for free!! It is pretty much my lifetime supply, not really, to clean my fuel system every other time I fill up.

 

if you premix can you still put it in?

 

Sure.. You can use Seafoam in any 2-cycle engine or premixed RX.

 

I use to work at Carquest, and I sold tons of this stuff. People swear by it. I have tried it on several occasions and it did a great job.

 

We should make up a little jingle just for us RX7 owners.

Something like: When your rotor is put puttin, grab a can of seafoam!

XD I don't know it was a shot in the dark. lol

 

Still absoultely no problems.

Cold as hell yesterday when I started it up. Let it run for under a minute and took off no stalls anymore and still have the low rpm idle.

All that black crap that flew out my exaust must have been carbon, I have learned one thing though and must warn you about it.

DO NOT USE THE RIGHT DOWN THE CARB METHOD IF YOU HAVE A CAT CONVERTER ON THE CAR! IT WILL SHORTEN ITS LIFE!

Learned this from a guy at napa, putting it in the tank its used at such a low level over time that it doesnt really hurt the cat. However putting it right down the carb while the fastest method for instant results really puts a crapload of crap through the exaust and can clog the cat.

 

Straight Pipe FTW