over40driv

I use name brand 93 octane gas in my 95 SC4, and have a new fuel filter. I have used Lucas fuel injector cleaner numerous times, but when I dont use it I get a little stumble at no load 1600 RPMs. I put a $ 5.00 bottle in and it runs like new. I also have new plugs and wires and no CEL.

92sc3forme

BUMP

i get the same exact problem.....as well i use the same injector cleaner as its reputable but not very often at all.

sometimes coming to a stop itll seem like its boggin out for a second every once in a great while not a big deal but it seems to be similar to your problem

KC95SC400

iTrader: (3)

I don't know about FI cleaner but, too much octane boost will kill a set of plugs. Worth a check.

KC

chargedsc

man the stuff i use is from toyota it comes in a kit called eco-right it has top engine cleaner,throttle body cleaner and fuel injector cleaner you can get it for about 25 dollors.I had a bad problem with mine and that took the sputter out but tell you one thing.the top engine cleaner you suck it in through vac. hose and it cleans the valves and the fuel injector cleaner you put in the tank just dont get it on the paint it will eat the paint.

over40driv

I can run a tank with the cleaner and it runs great, then bad with no cleaner, then good again, and yes with no cleaner when I pull up to a stop then take off ill often get a sputter.

chargedsc

man the stuff i am talking about you dont have to do but once a year and belive me you can tell after you run it

over40driv

Ill call the Toy. dealer tommorow.

AD_SC3

iTrader: (1)

Sounds like a job for.....Sea foam FTW!

SCoupe

fwiw, Far from the least expensive solution, but certianly the best. Remove the injectors, have them professionally cleaned, essentially rebuilt and reinstall them. This is far superior to fuel additive style cleaners.

The injectors are typically flow balanced to less than a 1% variance. When returned, the injectors look new, anything that can be replaced has been replaced, ei. filter baskets, o-rings, pintle caps. The injectors have been tested for leaks, spray pattern, flow rates and subjected to three ultrasonic cleanings and high pressure back-flush to remove particles.

Cost $18 each Witchhunter Performance, who I highly recommend. Worth a read: http://www.witchhunter.com/methods1.php4

There is a before and after photo there and it seriously represents what you can expect.

btw, Witchhunter suggests Techron twice a year for injector maintenance.

over40driv

I agree 100%, I pulled the injectors on my MR2 and Grand National and had them done, well worth the time and money. Thought Id save it for when the starter goes out on my SC4.

over40driv

Back to my orig. question, why does it run so much better with a bottle of cleaner in it, then when that tanks gone its back to its old tricks?